Microparticles GmbH, Volmerstr. 9A, UTZ, Geb.3.5.1, D-12489 Berlin, Phone: +49 30-6392 2565 Fax: +49 30-6392 2555

Product Palette

SEM image of MF- particles
 
Scanning Electron Micrograph of 3D assembled 1,5µm silica beads
 

Monodisperse Particles for Research Purposes

microParticles GmbH offers monodisperse spherical research particles based on various organic and inorganic polymers. The matrix chemistry of the particles ranges from melamine resins (MF), polystyrene (PS), polydivinylbenzene (PDVB), polymethyl methacrylate (PMMA), through poly(styrene-co-divinylbenzene) and poly(styrene-co-methacrylic acid methylester) copolymers to silica (Si02). The product palette covers beads of mean diameters from 0.1 up to 1000 µm in more than 200 different sizes. Characterized by their outstanding quality (typical C.V. values ≤3 %), our research grade particles are the best choice at economic prices.
Due to the different polymer compositions, the physical and chemical properties of the various types of particles are distinct from each other, which makes them suited for a whole spectrum of purposes. The high quality of our research grade particles and their versatility are illustrated with numerous successful applications in research and industry. We therefore feel obliged to continuously extend our product palette.

Pack sizes:

  • aqueous dispersions PS, PMMA
    0,1-0,99 µm (50 mg/ml): 10 ml, 15 ml, 50 ml
    1 µm and larger (100 mg/ml): 10 ml, 15 ml, 50 ml
  • aqueous dispersion MF (100 mg/ml): 10 ml, 15 ml, 50 ml
  • aqueous dispersion SiO2 (50 mg/ml): 10 ml, 15 ml, 50 ml
  • powder (MF: 1-12 µm; PS, PMMA: 5-1000 µm): 1.5 g, 5 g, 10 g
  • powder (SiO2: 1-25 µm): 0.75 g, 2.5 g, 5 g
-> Ask for other particle diameters and pack sizes or for specifically adjusted polymer densities.

 

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
MF-R-0.45MF-R-S24250,4650,047,510Details
MF-R-1.0MF-R-AR9490,9500,044,110Details
MF-R-1.3MF-R-S11861,310,043,210Details
MF-R-1.6MF-R-S11871,600,042,610Details
MF-R-1.8MF-R-S14921,800,042,410Details
MF-R-2.0MF-R-S17062,050,042,110Details
MF-R-2.4MF-R-AR4372,350,052,210Details
MF-R-2.6MF-R-AR7072,640,051,810Details
MF-R-2.8MF-R-AR4512,810,062,210Details
MF-R-2.8MF-R-AR7592,830,072,410Details
MF-R-3.3MF-R-AR4523,280,072,310Details
MF-R-3.4MF-R-B10553,380,072,210Details
MF-R-3.5MF-R-B6223,550,082,210Details
MF-R-3.6MF-R-B6203,600,082,110Details
MF-R-3.6MF-R-18953,630,061,710Details
MF-R-3.8MF-R-10853,810,092,410Details
MF-R-3.9MF-R-B617-13,890,082,110Details
MF-R-4.0MF-R-B7364,040,081,910Details
MF-R-4.1MF-R-13654,080,082,010Details
MF-R-4.1MF-R-36504,090,082,310Details
MF-R-4.1MF-R-80504,120,092,210Details
MF-R-4.4MF-R-11154,410,081,910Details
MF-R-4.6MF-R-18154,570,081,810Details
MF-R-5.2MF-R-S26165,170,091,710Details
MF-R-5.3MF-R-S1446-15,290,091,610Details
MF-R-5.5MF-R-23505,510,122,210Details
MF-R-5.6MF-R-2260-15,620,091,310Details
MF-R-5.7MF-R-81605,730,091,610Details
MF-R-6.2MF-R-94506,210,091,410Details
MF-R-6.3MF-R-9550-16,290,111,710Details
MF-R-6.3MF-R-32606,340,111,710Details
MF-R-6.7MF-R-A1906,750,111,610Details
MF-R-6.8MF-R-A188-16,780,121,710Details
MF-R-7.0MF-R-B13897,010,081,110Details
MF-R-7.1MF-R-8060-17,120,091,210Details
MF-R-7.2MF-R-41607,190,091,310Details
MF-R-7.3MF-R-2060-17,300,101,410Details
MF-R-7.4MF-R-1107-17,420,071,010Details
MF-R-7.4MF-R-2960-17,430,081,110Details
MF-R-7.4MF-R-2145-17,430,101,310Details
MF-R-7.6MF-R-0560-17,610,121,610Details
MF-R-7.7MF-R-12257,690,101,310Details
MF-R-7.7MF-R-0460-17,700,070,910Details
MF-R-7.9MF-R-L8177,850,081,110Details
MF-R-7.9MF-R-40607,930,121,510Details
MF-R-8.2MF-R-4560-18,200,091,010Details
MF-R-8.3MF-R-5260-18,280,091,110Details
MF-R-8.4MF-R-10878,390,091,110Details
MF-R-8.5MF-R-06608,500,111,310Details
MF-R-8.7MF-R-10358,660,111,310Details
MF-R-8.8MF-R-1097-28,830,090,910Details
MF-R-8.9MF-R-L8348,890,091,010Details
MF-R-9.3MF-R-10609,270,11,110Details
MF-R-9.3MF-R-4550-19,340,131,410Details
MF-R-9.5MF-R-B6309,460,11,110Details
MF-R-9.5MF-R-1265-19,490,131,310Details
MF-R-9.5MF-R-38609,510,151,610Details
MF-R-9.7MF-R-23609,650,111,110Details
MF-R-10.3MF-R-256010,300,111,110Details
MF-R-10.5MF-R-B62910,550,141,310Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-R-0.15PS-R-KM590,1470,0074,85Details
PS-R-0.15PS-R-KM090,1720,0063,55Details
PS-R-0.15PS-R-KM2490,1750,0052,85Details
PS-R-0.2PS-R-KM100,1960,0052,55Details
PS-R-0.2PS-R-L27150,2110,0083,55Details
PS-R-0.25PS-R-KM2390,2520,0062,55Details
PS-R-0.3PS-R-KM149-10,2870,0103,35Details
PS-R-0.3PS-R-KM3040,3040,0072,45Details
PS-R-0.35PS-R-KM3030,3400,0102,95Details
PS-R-0.4PS-R-KM305-30,4180,0112,75Details
PS-R-0.4PS-R-KM2990,4250,012,35Details
PS-R-0.5PS-R-KM377-10,4880,0142,85Details
PS-R-0.5PS-R-KM3680,5180,0152,85Details
PS-R-0.55PS-R-L26540,5520,0132,45Details
PS-R-0.55PS-R-KM1400,5570,0132,35Details
PS-R-0.6PS-R-L26570,6070,0152,55Details
PS-R-0.6PS-R-L21200,6080,0183,05Details
PS-R-0.6PS-R-B11550,6170,0203,25Details
PS-R-0.65PS-R-B11540,6280,0182,85Details
PS-R-0.65PS-R-L26560,6580,0152,35Details
PS-R-0.7PS-R-KM1520,6840,0192,75Details
PS-R-0.7PS-R-KM1250,7190,0273,75Details
PS-R-0.7PS-R-B11590,7210,0202,85Details
PS-R-0.8PS-R-KM2080,7570,0192,55Details
PS-R-0.8PS-R-KM297-20,7820,0182,35Details
PS-R-0.85PS-R-L11570,8360,0242,95Details
PS-R-0.9PS-R-L2910-10,9190,0262,85Details
PS-R-0.95PS-R-KM2820,9700,0293,05Details
PS-R-1.0PS-R-KM3901,020,032,710Details
PS-R-1.0PS-R-KM2711,050,032,910Details
PS-R-1.3PS-R-L25371,280,042,910Details
PS-R-1.4PS-R-L26141,370,042,610Details
PS-R-1.5PS-R-KM4031,500,042,310Details
PS-R-1.6PS-R-KM1781,590,052,910Details
PS-R-2.0PS-R-KM3321,980,031,510Details
PS-R-2.2PS-R-KM3732,230,041,810Details
PS-R-2.4PS-R-KM1482,390,052,210Details
PS-R-2.4PS-R-B12692,390,041,910Details
PS-R-2.5PS-R-B14492,480,051,910Details
PS-R-2.5PS-R-KM2112,560,041,410Details
PS-R-2.7PS-R-B12672,740,051,810Details
PS-R-3.0PS/Q-R-KM4183,030,092,910Details
PS-R-3.2PS/Q-R-B12293,200,134,210Details
PS-R-3.6PS/Q-R-L8493,630,163,310Details
PS-R-4.0PS/Q-R-B12034,060,112,610Details
PS-R-4.2PS/Q-R-B12014,180,112,610Details
PS-R-4.2PS/Q-R-B11984,240,102,310Details
PS-R-4.3PS/Q-R-KM4164,270,102,410Details
PS-R-4.4PS/Q-R-L12374,370,071,610Details
PS-R-4.5PS/Q-R-L27614,500,143,010Details
PS-R-5.0PS/Q-R-KM3834,970,061,210Details
PS-R-5.3PS/Q-R-L25805,310,101,910Details
PS-R-5.4PS/Q-R-L27315,350,091,610Details
PS-R-5.5PS/Q-R-B8885,460,122,110Details
PS-R-6.2PS/Q-R-A1526,240,122,010Details
PS-R-6.3PS/Q-R-L12466,320,111,710Details
PS-R-6.7PS/Q-R-KM2016,690,111,710Details
PS-R-6.7PS/Q-R-L25536,730,081,210Details
PS-R-6.8PS/Q-R-L28916,770,101,610Details
PS-R-6.8PS/Q-R-L28856,820,081,210Details
PS-R-6.8PS/Q-R-01706,840,091,410Details
PS-R-7.0PS/Q-R-L28837,060,081,210Details
PS-R-7.2PS/Q-R-L7887,180,091,210Details
PS-R-7.2PS/Q-R-B14877,190,091,210Details
PS-R-7.3PS/Q-R-L12147,290,081,110Details
PS-R-7.5PS/Q-R-B11627,460,091,210Details
PS-R-7.5PS/Q-R-L24597,510,091,210Details
PS-R-7.6PS/Q-R-L7717,570,081,010Details
PS-R-7.8PS/Q-R-14707,790,111,410Details
PS-R-7.8PS/Q-R-B6607,840,111,510Details
PS-R-8.1PS/Q-R-B6488,130,121,410Details
PS-R-8.4PS/Q-R-B6468,390,091,110Details
PS-R-8.4PS/Q-R-B6478,440,091,110Details
PS-R-9.5PS/Q-R-KM1989,510,111,110Details
PS-R-9.7PS/Q-R-B15009,660,121,310Details
PS-R-9.9PS/Q-R-KM1979,870,131,310Details
PS-R-10.0PS/Q-R-SC0810,140,121,210Details
PS-R-10.3PS/Q-R-B150210,270,131,310Details
PS-R-10.3PS/Q-R-B149010,280,090,910Details
PS-R-10.4PS/Q-R-B127810,360,090,810Details
PS-R-10.4PS/Q-R-L217710,440,080,810Details
PS-R-10.4PS/Q-R-L217610,450,080,810Details
PS-R-10.5PS/Q-R-B83310,550,090,910Details
PS-R-11.5PS/Q-R-KM32911,520,181,610Details
PS-R-12.3PS/Q-R-B77112,300,151,210Details
PS-R-13.0PS/Q-R-KM32812,920,171,310Details
PS-R-13.9PS/Q-R-KM19113,900,241,810Details
PS-R-14.5PS/Q-R-L261914,450,241,710Details
PS-R-15.2PS/Q-R-KM19415,210,312,010Details
PS-R-15.6PS/Q-R-L261115,590,130,810Details
PS-R-16.0PS/Q-R-L107615,920,221,410Details
PS-R-18.5PS/Q-R-KM20918,460,251,410Details
PS-R-19.5PS/Q-R-KM22319,300,361,910Details
PS-R-20.0PS/Q-R-KM38920,040,111,710Details
PS-R-25.5PS/Q-R-KM27925,400,51,710Details
PS-R-26.2PS/Q-R-B95426,150,361,410Details
PS-R-30.0PS/Q-R-KM31529,320,250,910Details
PS-R-32.0PS/Q-R-B118332,320,311,010Details
PS-R-34.0PS/Q-R-B140133,750,641,910Details
PS-R-36.0PS/Q-R-B88136,030,290,810Details
PS-R-37.0PS/Q-R-B87837,280,340,910Details
PS-R-40.0PS/Q-R-L254739,630,721,810Details
PS-R-41.0PS/Q-R-L87041,040,491,210Details
PS-R-46.0PS/Q-R-B102046,300,370,810Details
PS-R-51.0PS/Q-R-B121550,70,71,410Details
PS-R-52.0PS/Q-R-B63352,20,91,810Details
PS-R-60.0PS/Q-R-B67561,61,11,810Details
PS-R-65.0PS /Q-R-L143664,91,82,810Details
PS-R-65.0PS/Q-R-L8365,10,81,210Details
PS-R-90.0PS/Q-R-B66189,31,11,210Details
PS-R-100.0PS/Q-R-L21621011,61,610Details
PS-R-120.0PS/Q-R-L11271232.01,610Details
PS-R-150.0PS/Q-R-B15111472,81,910Details
PS-R-170.0PS/Q-R-L11241713,92,310Details
PS-R-200.0PS/Q-R-L10611963,81,910Details
PS-R-214.0PS/Q-R-L10582146,83,210Details
PS-R-266.0PS/Q-R-L24432664,21,610Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PMMA-R-0.1PMMA-R-KM2150,1050,0043,85Details
PMMA-R-0.2PMMA-R-KM2550,1960,0042,35Details
PMMA-R-0.25PMMA-R-KM257-20,2610,0062,45Details
PMMA-R-0.3PMMA-R-KM2560,2860,0072,35Details
PMMA-R-0.35PMMA-R-KM312-10,3500,0082,35Details
PMMA-R-0.4PMMA-R-KM2900,4060,012,35Details
PMMA-R-0.45PMMA-R-KM2890,4480,012,15Details
PMMA-R-0.5PMMA-R-KM2960,4990,012,05Details
PMMA-R-0.5PMMA-R-KM2950,5200,0122,25Details
PMMA-R-0.55PMMA-R-KM2910,5500,0122,25Details
PMMA-R-0.6PMMA-R-KM2870,6000,0132,25Details
PMMA-R-0.65PMMA-R-L1055-20,6520,0182,75Details
PMMA-R-0.75PMMA-R-L27140,7630,0182,45Details
PMMA-R-0.8PMMA-R-L1057-20,8070,0192,45Details
PMMA-R-0.9PMMA-R-L13740,9150,022,25Details
PMMA-R-1.4PMMA-R-L29901,360,042,710Details
PMMA-R-1.8PMMA-R-L929-11,840,052,7710Details
PMMA-R-2.0PMMA-R-L2837-51,960,052,410Details
PMMA-R-2.0PMMA-R-L23072,080,052,610Details
PMMA-R-2.1PMMA-R-L28262,110,052,210Details
PMMA-R-2.3PMMA-R-L28332,330,062,410Details
PMMA-R-2.4PMMA-R-L28342,440,052,210Details
PMMA-R-2.5PMMA-R-L28352,500,062,410Details
PMMA-R-2.7PMMA-R-L9262,740,042,410Details
PMMA-R-2.8PMMA-R-L28422,750,052,010Details
PMMA-R-2.9PMMA-R-L905-12,890,093,110Details
PMMA-R-3.0PMMA-R-B12302,960,093,110Details
PMMA-R-3.7PMMA-R-B7523,690,082,310Details
PMMA-R-3.8PMMA-R-B11673,770,113,010Details
PMMA-R-4.3PMMA-R-B1574,330,122,810Details
PMMA-R-4.3PMMA-R-L6564,360,092,010Details
PMMA-R-5.2PMMA-R-L3274-25,200,142,610Details
PMMA-R-6.3PMMA-R-B12996,330,132,010Details
PMMA-R-7.5PMMA-R-L5747,420,101,410Details
PMMA-R-7.5PMMA-R-B11807,520,121,610Details
PMMA-R-9.0PMMA-R-L15479,080,171,910Details
PMMA-R-10.0PMMA-R-L36089,900,222,210Details
PMMA-R-12.4PMMA-R-L54312,420,211,710Details
PMMA-R-14.5PMMA-R-B135114,590,241,710Details
PMMA-R-17.0PMMA-R-B142317,230,241,410Details
PMMA-R-22.0PMMA-R-L62121,830,351,610Details
PMMA-R-24.0PMMA-R-L109123,500,361,510Details
PMMA-R-27.0PMMA-R-L142526,620,501,910Details
PMMA-R-30.0PMMA-R-B139729,980,481,610Details
PMMA-R-33.0PMMA-R-L51232,760,481,510Details
PMMA-R-33.0PMMA-R-L54733,020,652,010Details
PMMA-R-36.0PMMA-R-B37536,011,02,810Details
PMMA-R-36.0PMMA-R-B33936,171,02,910Details
PMMA-R-37.0PMMA-R-B37436,940,952,610Details
PMMA-R-37.0PMMA-R-B37336,940,932,510Details
PMMA-R-38.0PMMA-R-L63038,060,972,610Details
PMMA-R-38.0PMMA-R-L85438,240,992,610Details
PMMA-R-41.0PMMA-R-L62441,000,651,610Details
PMMA-R-42.0PMMA-R-B15242,530,671,610Details
PMMA-R-50.0PMMA-R-L148250,30,851,710Details
PMMA-R-67.0PMMA-R-L61367,31,3210Details
PMMA-R-68.0PMMA-R-L62068,11,01,410Details
PMMA-R-74.0PMMA-R-B44573,82,12,810Details
PMMA-R-74.0PMMA-R-L62874,11,41,910Details
PMMA-R-87.0PMMA-R-L84286,71,82,110Details
PMMA-R-88.0PMMA-R-B44687,51,61,810Details
PMMA-R-100PMMA-R-B9341011,81,810Details
PMMA-R-116PMMA-R-L6261162,01,710Details
PMMA-R-119PMMA-R-L6271192,11,810Details
PMMA-R-122PMMA-R-B1641223,52,910Details
PMMA-R-124PMMA-R-G0081242,21,810Details
PMMA-R-127PMMA-R-L6141272,82,210Details
PMMA-R-148PMMA-R-Fi61482,71,810Details

 

 

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
SiO2-R-0.15SiO2-R-L3205-230,1430,0043,15Details
SiO2-R-0.25SiO2-R-L32350,2590,0072,75Details
SiO2-R-0.3SiO2-R-L32390,3040,0072,35Details
SiO2-R-0.35SiO2-R-L22310,3530,024,35Details
SiO2-R-0.35SiO2-R-L20280,3650,024,45Details
SiO2-R-0.4SiO2-R-L30320,3870,013,05Details
SiO2-R-0.55SiO2-R-L30590,5600,022,85Details
SiO2-R-0.7SiO2-R-L12620,6765Details
SiO2-R-0.75SiO2-R-L30460,7550,033,35Details
SiO2-R-0.8SiO2-R-L12940,7760,033,65Details
SiO2-R-0.8SiO2-R-630020,7980,033,45Details
SiO2-R-0.85SiO2-R-L12870,8320,033,75Details
SiO2-R-1.0SiO2-R-L3345-20,9770,0262,75Details
SiO2-R-1.0SiO2-R-L37051,150,032,85Details
SiO2-R-1.5SiO2-R-KM2641,700,042,45Details
SiO2-R-2.0SiO2-R-L15181,760,042,45Details
SiO2-R-2.0SiO2-R-B10721,930,052,75Details
SiO2-R-2.0SiO2-R-L15582,120,062,75Details
SiO2-R-2.5SiO2-R-SC20-22,400,041,45Details
SiO2-R-3.5SiO2-R-L36283,340,144,15Details
SiO2-R-4.0SiO2-R-115184,280,143,25Details
SiO2-R-4.5SiO2-R-KM2764,620,204,35Details
SiO2-R-4.5SiO2-R-KM2774,640,143,15Details
SiO2-R-5.0SiO2-R-KM3584,770,204,25Details
SiO2-R-6.0SiO2-R-SC23-16,120,203,35Details
SiO2-R-6.5SiO2-R-SC33-16,590,162,45Details
SiO2-R-7.0SiO2-R-SC31-47,000,152,15Details
SiO2-R-7.5SiO2-R-SC33-37,320,283,85Details
SiO2-R-7.5SiO2-R-SC31-57,560,192,65Details
SiO2-R-8.0SiO2-R-SC33-27,820,324,05Details
SiO2-R-8.0SiO2-R-SC31-67,870,232,95Details
SiO2-R-8.5SiO2-R-SC31-78,440,273,25Details
SiO2-R-9.0SiO2-R-SC31-89,100,232,55Details
SiO2-R-9.5SiO2-R-SC31-99,560,252,65Details
SiO2-R-14.0SiO2-R-L3519-113.790.594.35Details
SiO2-R-14.5SiO2-R-L3519-214,640,422,95Details
SiO2-R-15.0SiO2-R-L3519-315.290.493.25Details
SiO2-R-15.5SiO2-R-L3518-115.440.603.95Details
SiO2-R-16.0SiO2-R-L3518-216.040.553.45Details
SiO2-R-17.0SiO2-R-L3518-316.940.633.75Details
SiO2-R-18.0SiO2-R-L8580-218.120.764.25Details
SiO2-R-18.5SiO2-R-L3518-418.300.794.35Details
SiO2-R-18.5SiO2-R-SC30-118,430,563,15Details
SiO2-R-18.5SiO2-R-SC34-118,660,583,15Details
SiO2-R-19.0SiO2-R-SC30-318,990,492,65Details
SiO2-R-19.5SiO2-R-L3519-419.440.743.85Details
SiO2-R-19.5SiO2-R-SC30-419,480,442,25Details
SiO2-R-19.5SiO2-R-L3580-319.590.693,55Details
SiO2-R-19.5SiO2-R-SC34-319,700,623,15Details
SiO2-R-20.0SiO2-R-SC30-520,020,422,15Details
SiO2-R-20.0SiO2-R-SC34-420,150,572,85Details
SiO2-R-20.5SiO2-R-SC30-620,560,522,55Details
SiO2-R-21.0SiO2-R-SC34-521,030,693,35Details
SiO2-R-22.0SiO2-R-L3519-521.820.874.05Details
SiO2-R-22.5SiO2-R-SC1322,620,763,35Details
SiO2-R-23.0SiO2-R-L3650-223,140,803,55Details
SiO2-R-25.0SiO2-R-L3650-124,830,933,85Details

SEM image of 1,5 µm Certified Particle Size Standard beads
 
Sets of Certified Particle Size Standards with nominal diameters of 2 µm, 2.5 µm, 3 µm and 5.5 µm, 6.5 µm, and 7.5 µm as characterized by Electrical Sensing Zone Method (COULTER™ MULTISIZER)
 

 NIST-traceable Particle Size Standards

Particle size standards are being used in industrial, pharmaceutical, clinical, and scientific laboratories for many purposes. Among others is the calibration of various measuring instruments such as flow cytometers, laser diffraction devices, analytical disc centrifuges, or cell and particle counters. Moreover, they allow for the traceability of measurement results, the development and validation of measuring techniques, and for the assessment of measurement uncertainties. Also, they are applied in the field of quality control and for the calibration and testing of filter materials.

For these applications, microParticles GmbH offers its customers particle size standards of highest quality over a wide diameter range from 100 nm through approximately 1000 µm. They consist of polystyrene or poly(styrene-co-divinylbenzene) and are characterized by combining different methods like transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential sedimentation (high resolution disc centrifuge DC 24000), optical microscopy, and electrical sensing zone method (Coulter Multisizer™ 3 and 4).

Thereby, the certified particle size standards of microParticles GmbH are among the best characterized ones currently available in the market. Other product characteristics are:

  • Traceable to primary reference materials of the National Institute of Standards and Technology (NIST/USA) and European Institute for Reference Materials and Measurements (IRMM/Belgium).
  • Highly monodisperse size distribution.g
  • CV < 2 % for the majority of the products.
  • Absolutely spherical particle shape.

In order to guarantee high colloidal stability, the aqueous particle suspensions contain surfactants and antimicrobial agents. Every particle size comes with a certificate that documents important information like certified mean diameter, standard deviation, CV-value, size distribution graph, solids content of the suspension, particle number per ml, material density, refractive index, and other.

Pack size:

  • aqueous dispersions (20 mg/ml): 10 ml, 15 ml
  • powder (160 µm and larger): 1 g
-> Ask for other particle diameters and pack sizes or for specifically adjusted polymer densities.

 

Product
Name
Batch
No.
Certified
Diameter
(nm)
Standard
Deviation
(nm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-ST-0.15PS-ST-KM08158 ± 253,32Details
PS-ST-KM56-1197 ± 652,52Details
PS-ST-0.25PS-ST-B1049253 ± 752,12Details
PS-ST-0.35PS-ST-B1051336 ± 872,12Details
PS-ST-0.45PS-ST-L2087448 ± 7132,82Details
PS-ST-0.5PS-ST-L2866497 ± 7132,62Details
PS-ST-0.55PS-ST-B1032542 ± 8112,12Details
PS-ST-0.6PS-ST-B1156618 ± 13172,72Details
PS-ST-0.65PS-ST-L1248662 ± 12131,92Details
PS-ST-0.7PS-ST-B1047697 ± 12131,92Details
PS-ST-0.75PS-ST-B974742 ± 11152,02Details
PS-ST-0.8PS-ST-B1272787 ± 12222,82Details
PS-ST-0.9PS-ST-L265892 ± 12202,22Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-ST-1.0PS-ST-L2659-11,046 ± 0,0160,0353,42Details
PS-ST-1.0PS-ST-L25221,270 ± 0,0190,0322,52Details
PS-ST-1.5PS-ST-L26551,537 ± 0,0230,0291,92Details
PS-ST-2.0PS-ST-KM2161,923 ± 0,0290,0372,02Details
PS-ST-2.0PS-ST-L11861,998 ± 0,0310,0422,12Details
PS-ST-2.5PS-ST-KM1442,366 ± 0,0360,0351,52Details
PS-ST-2.5PS-ST-KM1732,586 ± 0,0390,0461,82Details
PS-ST-3.0PS/Q-ST-L28603,034 ± 0,0450,0762,52Details
PS-ST-3.5PS-ST-L27473,530 ± 0,0530,0701,92Details
PS-ST-4.0PS/Q-ST-KM1954,051 ± 0,0610,0761,92Details
PS-ST-5.0PS/Q-ST-B10245,045 ± 0,0650,0781,62Details
PS-ST-5.5PS/Q-ST-L7825,479 ± 0,0650,0691,32Details
PS-ST-6.0PS/Q-ST-KM210-26,093 ± 0,0910,0941,52Details
PS-ST-6.0PS/Q-ST-L775-26,110 ± 0,0750,0631,02Details
PS-ST-6.5PS/Q-ST-L7796,668 ± 0,0800,0751,12Details
PS-ST-7.0PS/Q-ST-L7857,246 ± 0,0850,0791,12Details
PS-ST-8.0PS/Q-ST-L5688,020 ± 0,0930,0991,22Details
PS-ST-9.0PS/Q-ST-L13218,984 ± 0,1170,0961,12Details
PS-ST-10.0PS/Q-ST-L9359,727 ± 0,1080,1341,42Details
PS-ST-10.6PS/Q-ST-B83210,57 ± 0,100,111,02Details
PS-ST-15.0PS/Q-ST-B90114,94 ± 0,150,130,92Details
PS-ST-20.0PS/Q-ST-L110220,50 ± 0,250,221,22Details
PS-ST-25.0PS/Q-ST-L78725,18 ± 0,280,391,52Details
PS-ST-30.0PS/Q-ST-L78929,63 ± 0,380,351,22Details
PS-ST-40.0PS/Q-ST-B49339,79 ± 0,480,471,22Details
PS-ST-40.0PS/Q-ST-L108540,80 ± 0,440,391,02Details
PS-ST-50.0PS/Q-ST-L1053-148,9 ± 0,60,61,22Details
PS-ST-60.0PS/Q-ST-B73359,7 ± 0,70,81,32Details
PS-ST-70.0PS/Q-ST-B674-170,6 ± 1,11,21,62Details
PS-ST-80.0PS/Q-ST-B676-180,6 ± 1,21,21,52Details
PS-ST-90.0PS/Q-ST-B661-189,3 ± 1,31,11,22Details
PS-ST-100.0PS/Q-ST-L1017100 ± 1,41,61,62Details
PS-ST-150.0PS/Q-ST-B939155 ± 2,62,01,32Details
PS-ST-200.0PS/Q-ST-B644205 ± 3,52,51,22Details
PS-ST-250.0PS/Q-ST-B743244 ± 4,93,51,42Details

500 nm PS-FluoRed particles
 
10 µm PS-FluoRed particles
 
7,5 µm MF-FluoGreen particles
 
10 µm MF-FluoBlue particles Optical Fluorescence Micrographs (Olympus BX40-FLA)
 

Fluorescent Particles

Novel manufacturing techniques, developed and established at microParticles GmbH, allow the preparation of a wide variety of fluorescent nano- and microspheres ranging in size, matrix chemistry, type of fluorochrome, fluorescence intensity, and surface functional groups. The specifically chosen fluorescent dyes almost cover the complete spectral range from UV through near IR. Outstanding properties of our melamine resin (MF)- and Polystyrene-based (PS) fluorescent particles are:

  • narrow size distribution (C.V. values ≤3 %)
  • available in a wide diameter range
  • fluorochromes are internally incorporated with a homogeneous distribution
  • intensive color and bright fluorescence
  • chemical and biochemical functionalizations are possible

In comparison to PS-based particles, the fluorescently-labelled MF microspheres have the additional advantage that they are dispersible in common organic solvents and oils without any dye-leaching, swelling, or shrinking. The fluorescent particles of microParticles GmbH are used for flow measurements in gases and liquids like Laser Doppler Anemometry (LDA), Particle Dynamics Analysis (PDA), and Particle Image Velocimetry (PIV), filter testing, in the field of non-destructive testing of complex aircraft, railway, and automotive components, in medical research (phagocytosis testing, blood-flow measurements, imaging), or as tracers in environmental science. Recently, microParticles GmbH developed PS-based fluorescent particles for calibration purposes in flow cytometry as well as mulifluorescent particles, dyed with up to five different fluorochromes in one particle (MF- and PS-based).

Pack sizes:

  • aqueous dispersions (25 mg/ml): 5 ml, 10 ml, 15 ml
  • powders upon request
-> Inquiries for other dyes or special multicolor preparations are welcome.

 

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
MF-FluoBlue-1.0MF-FluoBlue-S8280,9300,055,32,5Details
MF-FluoBlue-2.0MF- FluoBlue-L9501,910,052,62,5Details
MF-FluoBlue-2.0MF-FluoBlue-L951-12,080,041,82,5Details
MF-FluoBlue 2.4MF-FluoBlue-L9522,440,042,02,5Details
MF-FluoBlue-4.7MF-FluoBlue-01704,710,081,72,5Details
MF-FluoBlue 6.5MF-FluoBlue-L9456,550,081,32,5Details
MF-FluoBlue 7.4MF-FluoBlue-L9467,370,121,72,5Details
MF-FluoBlue 7.4MF-FluoBlue-L9489,780,151,62,5Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
MF-FluoGreen-0.5MF-FluoGreen-S8760,5302,5Details
MF-FluoGreen-1.1MF-FluoGreen-S19401,110,054,22,5Details
MF-FluoGreen-1.3MF-FluoGreen-AR4561,260,043,12,5Details
MF-FluoGreen-1.4MF-FluoGreen-51501,440,053,52,5Details
MF-FluoGreen-1.5MF-FluoGreen-11501,450,053,82,5Details
MF-FluoGreen-1.7MF-FluoGreen-AR3871,740,052,82,5Details
MF-FluoGreen-1.9MF-FluoGreen-AR9751,900,052,82,5Details
MF-FluoGreen-2.2MF-FluoGreen-53502,210,062,92,5Details
MF-FluoGreen-2.2MF-FluoGreen-AR9862,220,073,12,5Details
MF-FluoGreen-2.8MF-FluoGreen-AR3882,770,072,52,5Details
MF-FluoGreen-3.2MF-FluoGreen-10503,160,082,62,5Details
MF-FluoGreen-3.2MF-FluoGreen-4950-23,210,144,22,5Details
MF-FluoGreen-3.4MF-FluoGreen-04503,360,082,32,5Details
MF-FluoGreen-3.6MF-FluoGreen-07503,580,082,32,5Details
MF-FluoGreen-3.7MF-FluoGreen-05503,690,112,92,5Details
MF-FluoGreen-3.9MF-FluoGreen-03703,910,092,22,5Details
MF-FluoGreen-4.3MF-FluoGreen-04704,250,092,22,5Details
MF-FluoGreen-4.5MF-FluoGreen-37504,540,112,52,5Details
MF-FluoGreen-4.9MF-FluoGreen-01704,910,081,62,5Details
MF-FluoGreen-5.4MF-FluoGreen-08505,410,122,22,5Details
MF-FluoGreen-5.5MF-FluoGreen-15505,510,122,22,5Details
MF-FluoGreen-5.9MF-FluoGreen-18505,710,091,62,5Details
MF-FluoGreen-6.2MF-FluoGreen-17506,170,121,92,5Details
MF-FluoGreen-6.5MF-FluoGreen-30506,470,142,22,5Details
MF-FluoGreen-6.7MF-FluoGreen-09506,700,182,72,5Details
MF-FluoGreen-7.0MF-FluoGreen-42507,090,162,22,5Details
MF-FluoGreen-7.6MF-FluoGreen-31507,620,172,22,5Details
MF-FluoGreen-8.0MF-FluoGreen-2750-17,890,141,82,5Details
MF-FluoGreen-8.6MF-FluoGreen-26508,590,131,52,5Details
MF-FluoGreen-9.6MF-FluoGreen-28509,580,181,92,5Details
MF-FluoGreen-10.6MF-FluoGreen-L84210,60,121,12,5Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
MF-FluoGreen-1.1MF-FluoGreen-06601,120,087,12,5Details
MF-FluoGreen-1.7MF-FluoGreen-10601,740,042,62,5Details
MF-FluoGreen-2.0MF-FluoGreen-03501,950,042,22,5Details
MF-FluoGreen-2.2MF-FluoGreen-08602,150,052,42,5Details
MF-FluoGreen-2.3MF-FluoGreen-07602,320,052,12,5Details
MF-FluoGreen-2.9MF-FluoGreen-40602,890,062,12,5Details
MF-FluoGreen-4.3MF-FluoGreen-04604,340,071,72,5Details
MF-FluoGreen-5.9MF-FluoGreen-0560-15,680,101,72,5Details
MF-FluoGreen-6.5MF-FluoGreen-0250-16,180,132,12,5Details
MF-FluoGreen-6.7MF-FluoGreen-0150-16,380,142,32,5Details
MF-FluoGreen-7.0MF-FluoGreen-18607,040,091,42,5Details
MF-FluoGreen-12.2MF-FluoGreen-L161212,190,171,42,5Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
MF-FluoOrange-0.4MF-FluoOrange-S886-10,3660,0410,02,5Details
MF-FluoOrange-0.4MF-FluoOrange-AR2660,3950,025,12,5Details
MF-FluoOrange-0.6MF-FluoOrange-AR2640,6200,034,82,5Details
MF-FluoOrange-0.8MF-FluoOrange-AR5750,8150,023,02,5Details
MF-FluoOrange-0.9MF-FluoOrange-AR6650,9340,055,32,5Details
MF-FluoOrange-1.0MF-FluoOrange-AR9910,9840,033,32,5Details
MF-FluoOrange-1.7MF-FluoOrange-25501,730,063,22,5Details
MF-FluoOrange-1.9MF-FluoOrange-01601,850,042,32,5Details
MF-FluoOrange-2.0MF-FluoOrange-12402.000,073,52,5Details
MF-FluoOrange-2.2MF-FluoOrange-30502,200,062,72,5Details
MF-FluoOrange-2.2MF-FluoOrange-26502,230,062,72,5Details
MF-FluoOrange-2.5MF-FluoOrange-27502,460,072,72,5Details
MF-FluoOrange-2.5MF-FluoOrange-L7242,510,051,92,5Details
MF-FluoOrange-2.6MF-FluoOrange-1950-12,640,114,02,5Details
MF-FluoOrange-2.6MF-FluoOrange-AR10042,650,052,12,5Details
MF-FluoOrange-3.3MF-FluoOrange-AR10003,340,082,52,5Details
MF-FluoOrange-3.9MF-FluoOrange-20603,870,082,02,5Details
MF-FluoOrange-4.0MF-FluoOrange-L7654,020,092,12,5Details
MF-FluoOrange-4.3MF-FluoOrange-23504,340,092,02,5Details
MF-FluoOrange-4.7MF-FluoOrange-L8014,670,081,62,5Details
MF-FluoOrange-4.7MF-FluoOrange-21604,700,091,92,5Details
MF-FluoOrange-4.8MF-FluoOrange-11504,810,112,32,5Details
MF-FluoOrange-4.8MF-FluoOrange-33504,830,112,22,5Details
MF-FluoOrange-5.0MF-FluoOrange-L8024,930,091,92,5Details
MF-FluoOrange-5.0MF-FluoOrange-L8035.000,122,42,5Details
MF-FluoOrange-5.5MF-FluoOrange-17505,450,112,02,5Details
MF-FluoOrange-5.5MF-FluoOrange-09505,480,081,42,5Details
MF-FluoOrange-6.0MF-FluoOrange-14506,040,121,92,5Details
MF-FluoOrange-6.4MF-FluoOrange-22506,380,152,32,5Details
MF-FluoOrange-6.8MF-FluoOrange-13506,800,172,62,5Details
MF-FluoOrange-7.1MF-FluoOrange-B432-17,120,071,02,5Details
MF-FluoOrange-7.1MF-FluoOrange-11607,120,152,12,5Details
MF-FluoOrange-7.2MF-FluoOrange-15507,190,131,72,5Details
MF-FluoOrange-7.5MF-FluoOrange-03607,470,121,62,5Details
MF-FluoOrange-7.7MF-FluoOrange-05507,680,192,52,5Details
MF-FluoOrange-8.0MF-FluoOrange-AR4807,920,182,22,5Details
MF-FluoOrange-8.4MF-FluoOrange-05608,420,111,32,5Details
MF-FluoOrange-9.4MF-FluoOrange-L8369,360,080,92,5Details
MF-FluoOrange-9.4MF-FluoOrange-07509,360,161,72,5Details
MF-FluoOrange-L839MF-FluoOrange-L8399,440,091,02,5Details
MF-FluoOrange-L837MF-FluoOrange-L8379,440,090,92,5Details
MF-FluoOrange-9.8MF-FluoOrange-03509,840,262,62,5Details
MF-FluoOrange-10.5MF-FluoOrange-L84310,460,090,92,5Details
MF-FluoOrange-11.0MF-FluoOrange-S275410,910,161,42,5Details
MF-FluoOrange-12.0MF-FluoOrange-B62611,950,252,02,5Details
MF-FluoOrange-12.0MF-FluoOrange-S275512,040,231,92,5Details
MF-FluoOrange-13.5MF-FluoOrange-S274713,350,191,42,5Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
MF-FluoRed-0.5MF-FluoRed-S8790,5032,5Details
MF-FluoRed-1.0MF-FluoRed-L7690,9400,055,82,5Details
MF-FluoRed-1.4MF-FluoRed-S8181,360,043,02,5Details
MF-FluoRed-2.3MF-FluoRed-B7512,260,041,62,5Details
MF-FluoRed-2.6MF-FluoRed-L8162,550,052,02,5Details
MF-FluoRed-2.7MF-FluoRed-L7972,650,062,32,5Details
MF-FluoRed-3.6MF-FluoRed-L7963,560,072,12,5Details
MF-FluoRed-3.6MF-FluoRed-04603,620,082,12,5Details
MF-FluoRed-3.6MF-FluoRed-L7953,640,082,12,5Details
MF-FluoRed-3.7MF-FluoRed-12603,720,071,92,5Details
MF-FluoRed-4.0MF-FluoRed-L7914,020,071,72,5Details
MF-FluoRed-4.4MF-FluoRed-L7944,410,092,02,5Details
MF-FluoRed-5.1MF-FluoRed-01605,060,091,72,5Details
MF-FluoRed-5.4MF-FluoRed-02605,380,081,52,5Details
MF-FluoRed-6.4MF-FluoRed-10606,370,071,12,5Details
MF-FluoRed-7.8MF-FluoRed-06607,820,081,12,5Details
MF-FluoRed-7.8MF-FluoRed-03607,840,091,12,5Details
MF-FluoRed-8.8MF-FluoRed-05608,820,131,52,5Details
MF-FluoRed-9.1MF-FluoRed-07609,100,101,12,5Details
MF-FluoRed-9.3MF-FluoRed-L8389,260,080,92,5Details
MF-FluoRed-10.8MF-FluoRed-L84010,760,111,02,5Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-FluoGreen-0.25PS-FluoGreen-Fi2890,2530,0072,92,5Details
PS-FluoGreen-0.3PS-FluoGreen-Fi255-10,2930,0082,72,5Details
PS-FluoGreen-0.3PS-FluoGreen-Fi920,2852,5Details
PS-FluoGreen-0.5PS-FluoGreen-Fi194-10,4500,0102,22,5Details
PS-FluoGreen-0.6PS-FluoGreen-Fi131-10,6000,0203,12,5Details
PS-FluoGreen-0.75PS-FluoGreen-Fi132-10,7100,0233,32,5Details
PS-FluoGreen-0.85PS-FluoGreen-Fi133-10,8100,00222,72,5Details
PS-FluoGreen-1.0PS-FluoGreen-Fi1821,080,043,52,5Details
PS-FluoGreen-1.5PS-FluoGreen-Fi1681,270,032,72,5Details
PS-FluoGreen-1.5PS-FluoGreen-Fi1931,520,032,12,5Details
PS-FluoGreen-1.5PS-FluoGreen-Fi1951,710,031,82,5Details
PS-FluoGreen-2.0PS-FluoGreen-Fi1832,070,031,62,5Details
PS-FluoGreen-2.5PS-FluoGreen-Fi2372,480,041,72,5Details
PS-FluoGreen-3.0PS-FluoGreen-Fi1352,800,041,42,5Details
PS-FluoGreen-3.5PS-FluoGreen-Fi2383,540,072,02,5Details
PS-FluoGreen-4.5PS-FluoGreen-Fi2414,490,143,02,5Details
PS-FluoGreen-5.0PS-FluoGreen-Fi1995,190,142,72,5Details
PS-FluoGreen-8.0PS-FluoGreen-Fi2207,810,111,42,5Details
PS-FluoGreen-9.5PS-FluoGreen-Fi1739,600,121,32,5Details
PS-FluoGreen-10.0PS-FluoGreen-Fi22610,230,131,32,5Details
PS-FluoGreen-12.5PS-FluoGreen-Fi21412,320,100,82,5Details
PS-FluoGreen-15.0PS-FluoGreen-Fi17415,080,120,82,5Details
PS-FluoGreen-20PS-FluoGreen-Fi16619,780,221,12,5Details
PS-FluoGreen-25PS-FluoGreen-Fi31925,230,592,42,5Details
PS-FluoGreen-40PS-FluoGreen-Fi17541,140,330,82,5Details
PS-FluoGreen-50PS-FluoGreen-Fi22848,10,61,32,5Details
PS-FluoGreen-60PS-FluoGreen-Fi16758,70,91,62,5Details
PS-FluoGreen-100PS-FluoGreen-Fi27598,12,42,42,5Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-FluoRed-0.5PS-FluoRed-Fi144-10,4700,012,02,5Details
PS-FluoRed-1.0PS-FluoRed-Fi2670,9800,043,82,5Details
PS-FluoRed-1.5PS-FluoRed-Fi2771,610,042,32,5Details
PS-FluoRed-2.0PS-FluoRed-Fi1802,080,031,62,5Details
PS-FluoRed-2.5PS-FluoRed-Fi2352,470,041,62,5Details
PS-FluoRed-3.0PS-FluoRed-Fi3062,990,072,42,5Details
PS-FluoRed-3.5PS-FluoRed-Fi2363,550,072,02,5Details
PS-FluoRed-4.0PS-FluoRed-Fi1914,010,102,42,5Details
PS-FluoRed-4.5PS-FluoRed-Fi2404,470,143,02,5Details
PS-FluoRed-5.0PS-FluoRed-Fi3005,030,071,42,5Details
PS-FluoRed-8.0PS-FluoRed-Fi2197,760,121,52,5Details
PS-FluoRed-10.0PS-FluoRed-Fi3179,890,101,02,5Details
PS-FluoRed-15.5PS-FluoRed-Fi26415,350,302,02,5Details
PS-FluoRed-19.0PS-FluoRed-Fi19619,020,160,82,5Details
PS-FluoRed-25PS-FluoRed-Fi25125,070,200,82,5Details
PS-FluoRed-35PS-FluoRed-Fi29033,030,621,92,5Details
PS-FluoRed-50PS-FluoRed-Fi22748,20,61,22,5Details
PS-FluoRed-100PS-FluoRed-Fi15395,71,51,62,5Details

Functionalized Particles

In medical diagnostics, pharmaceutical industry, biotechnology, molecular biology, analytics, etc. multifunctional polymer particles with tailored surface properties are required to a growing extent. In recent years, microParticles GmbH successfully accomplished the development of functionalized polystyrene-, PMMA-, silica-, and melamine resin particles. Innovative strategies and preparation techniques, such as

  • chemical derivatization of the polymer surfaces,
  • sol-gel processes,
  • use of functionalized monomers,
  • surface polymerization in organic and aqueous media,
  • modification of particle surfaces by self-assembly (SAMs),
  • nanostructured surface coatings

led to the linkage of a variety of functional groups to the surface of particles, made from different materials. The adjacent figure illustrates available functionalities. Particular emphasis is placed on carboxylated polymer beads, especially on melamine resin basis. With loadings of up to 1000 µmole COOH/g, these particles show excellent monodispersity, high mechanical strength and chemical resistance, low non-specific protein adsorption, and good colloidal stability over a wide range of pH values and electrolyte concentrations. Mercapto- and amino-functionalized particles also belong to our product spectrum. Upon request, modification with sulfonic acid, maleimid, epoxy, or hydroxyl groups is possible.

Pack sizes:

  • aqueous dispersions PS-, PMMA-COOH
    0,1-0,99 µm: 50 mg/ml; 5 ml, 10 ml, 15 ml
    1 µm and larger: 100 mg/ml; 5 ml, 10 ml, 15 ml
  • aqueous dispersions MF-COOH (100 mg/ml): 5 ml, 10 ml, 15 ml
  • aqueous dispersions MF-Fluo-COOH (25 mg/ml): 5 ml, 10 ml, 15 ml
  • aqueous dispersions SiO2-COOH, -NH2 (50 mg/ml): 5 ml, 10 ml, 15 ml
-> Inquiries for other materials and diameters, than listed in the product tables are welcome.

 

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
MF-COOH-AR5861,020,043,947510Details
MF-COOH-S10001,900,094,732010Details
MF-COOH-AR8112.820.062.230010Details
MF-COOH-AR9874,020,071,725010Details
MF-COOH-AR4235,290,091,740010Details
MF-COOH-S9866,100,122,022010Details
MF-COOH-S9898,240,202,420010Details
MF-COOH-S9909,750,252,516010Details
MF-COOH-AR98810,290,191,825010Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
PMMA-COOH-AR9790,1050,0043,8> 1005Details
PMMA-COOH-AR7530,1920,0042,1> 705Details
PMMA-COOH-AR1430,4110,012,5> 305Details
PMMA-COOH-AR8301,020,043,5> 7210Details
PMMA-COOH-AR1452,080,052,6> 3010Details
PMMA-COOH-AR9523,770,102,6> 2010Details
PMMA-COOH-AR8974,620,112,3> 3010Details
PMMA-COOH-AR4256,330,121,8> 2010Details
PMMA-COOH-AR1589,570,212,2> 2010Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
PS-COOH-L28670,5270,012,31005Details
PS-COOH-B14770,8160,022,8605Details
PS-COOH-B14821,200,054,215010Details
PS-COOH-B8742,350,041,94010Details
PS-COOH-B8732,690,051,93010Details
PS-COOH-L17073,900,112,72210Details
PS-COOH-KM854,400,232,22010Details
PS-COOH-L28524,640,122,63010Details
PS-COOH-KM844,880,112,32410Details
PS-COOH-KM835,050,102,02510Details
PS-COOH-KM285,380,132,31710Details
PS-COOH-KM335,760,132,2910Details
PS-COOH-B8956,390,11,61510Details
PS-COOH-KM82-B8,860,11,21210Details
PS-COOH-KM82-A8,910,11,21010Details
PS-COOH-B85912,550,171,31810Details
PS-COOH-B91013,520,10,8910Details
PS-COOH-B86015,470,191,3910Details

Product
Name
ColorMean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
MF-FITC-COOH-S1014Green0,4801202,5Details
MF-FITC-COOH-S1018Green0,9001302,5Details
MF-FITC-COOH-S2794Green1,260,0352,82652,5Details
MF-FITC-COOH-S1080Green4,330,081,72802,5Details
MF-RhB-COOH-S2252Red0,36610,06602,5Details
MF-RhB-COOH-IM42Red0,3955,16252,5Details
MF-RhB-COOH-AR582Red0,6200,034,83752,5Details
MF-RhB-COOH-S961Red1,090,076,02802,5Details
MF-RhB-COOH-IM44Red2,000,073,510502,5Details
MF-RhB-COOH-IM43Red2,810,144,79502,5Details
MF-RhB-COOH-S1079Red4,340,092,02302,5Details
MF-RhB-COOH-IM45Red4,930,091,913002,5Details
MF-RhB-COOH-IM47Red7,120,152,116002,5Details
MF-RhB-COOH-IM46Red9,840,262,66502,5Details
MF-NB-COOH-S2723Red0,4950,035,32002,5Details
MF-NB-COOH-S1058Red0,9200,055,72102,5Details
MF-NB-COOH-S2722Red4,000,061,54802,5Details
MF-NB-COOH-S1336Red5,360,091,86202,5Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
SiO2-COOH-AR10250,2340,014,8> 305Details
SiO2-COOH-AR10020,2370,014,9> 305Details
SiO2-COOH-AR10010,3650,024,4> 305Details
SiO2-COOH-AR8320,6760,033,9> 305Details
SiO2-COOH-AR7561,010,044,0> 305Details
SiO2-COOH-AR8332,120,062,7> 305Details
SiO2-COOH-AR10263,020,072,2> 305Details
SiO2-COOH-AR7893,920,143,6> 305Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
NH2

(µmol/g)
Solids
Content
(wt.-%)
Details
SiO2-NH2-AR9890,1430,014,0> 305Details
SiO2-NH2-AR10030,2340,014,8> 305Details
SiO2-NH2-AR9930,3650,024,4> 305Details
SiO2-NH2-AR1140,4620,024,8> 305Details
SiO2-NH2-AR8320,6760,033,9> 305Details
SiO2-NH2-AR7211,010,044,0> 305Details
SiO2-NH2-AR3462,120,062,7> 305Details
SiO2-NH2-AR3603,020,072,2> 305Details
SiO2-NH2-AR7893,920,143,6> 305Details

SEM image of Cu-coated MF particles
 
Optical microscopy image of 17 µm Au-coated PS particles
 
Optical microscopy image of 10 µm Au-coated MF particles
 

Metal-coated Polymer Particles

Monodisperse metal-coated microspheres have found wide applications in the fields of catalysis, anisotropically conductive adhesives (ACAs), microelectronics, Surface Enhanced Raman Scattering (SERS), Particle Image Velocimetry (PIV), and bioassays. During recent years, scientists at microParticles GmbH have successfully developed strategies to metallize chemically different microspheres like melamine resins, polystyrene, polystyrene-divinylbenzene copolymers, poly(methyl methacrylate) copolymers, or silica. The composite microspheres consist of a monodisperse polymer core whereas the shell either consists of metal nanoparticles or a thin metal film of e.g. gold, silver, copper, or others.

The use of the monodisperse melamine resin particles (MF) has a number of advantages:

  • the surface of the MF particles is well-defined, having a large number of reactive amino and imino groups for immobilization of different metal ions or metal nanoparticles
  • under acidic environments, the unmodified surface of MF particles is positively charged and shows a high binding capacity to complex anions like AuCl4-, PdCl42-, PtCl62-
  • in particular, the AuCl4- adsorbance on MF microparticles of about 500 nm diameter reaches a very high value of about 0,5 g/g.

Generally, for the preparation of our metal-coated microspheres three approaches have been used:

Self-assembly approach:
In the self-assembly approach, preformed colloidal nanoparticles are adsorbed on the specifically modified particle surface by electrostatic interactions, for instance. The extent of nanoparticle surface coverage can be controlled by varying the pH value of the solution, the immersion time, the metal colloid concentration in suspension, nanoparticle dimensions, and the chemical surface properties of the polymer particles. In this way, monodisperse microspheres with individually dispersed nanoparticles of gold, silver, platinum, or palladium can be prepared.

In-situ synthesis approach:                                                                                                                                                          In the in-situ approach AuCl4-, PdCl42-, PtCl62- precursor ions are bound on the surface of chemically modified monodisperse particles by complexation and/or electrostatic interactions, followed by their in situ reduction to nanosized metal particles. TEM images show the in situ synthesized metal nanoparticles being homogeneously distributed on the particle surface without aggregation. The average diameter is around 2-3 nm with a narrow size distribution.

Electroless deposition approach:                                                                                                                                                In the electroless deposition approach, the specifically surface-modified microspheres are immersed in an electroless plating bath, which consists of the metal ions and a reducing agent. Gold, silver, palladium, or platinum nanoparticles immobilized on the particle surface can be used as seeds for the auto-catalytic deposition of the metal. The result is a metal nanoshell with variable thickness of gold, silver, or copper on the particle surface. High-quality metal coatings can be achieved with particles in the size region above 1 µm. Research is underway to develop particles with gold nanoshells in the submicron range, too

 


Scanning Electron Microscopy images of PS-MAG-COOH particles (360 nm)
 
Nominal 1µm superparamagnetic silica particles (Scanning Electron Microscopy image, by courtesy of Dr. M. Wagener, Carl Zeiss NTS GmbH)
 
Fluorescence micrograph of magnetic polystyrene particles with streptavidin-coating, visualized by FITC-Biotin
 

Superparamagnetic Polymer Particles

MicroParticles GmbH offers its customers a series of newly developed magnetic spheres in the diameter range from 300 nm through 50 microns. The particle matrix consists of either polystyrene or silica with homogeneously incorporated nanometer-sized iron oxide. Special surface coatings encapsulate the particles towards surrounding media thus preventing the leaching of iron species. Outstanding properties of the new magnetic microspheres of microParticles GmbH are:

  • Narrow size distribution (CV <5%) and absolutely spherical shape.
  • Superparamagnetic.
  • The iron oxide content can be adjusted in a wide range up to 50 wt.-%.
  • The special surface coating minimizes aggregation in aqueous suspension and non-specific binding of proteins and nucleic acids.

In addition to plain magnetic particles (PS-MAG and SiO2-MAG) and magnetic particles with COOH-modification (PS-MAG-COOH and SiO2-MAG-COOH), we also supply magnetic beads with streptavidin coatings (PS-MAG-SA and SiO2-MAG-SA). Moreover, microParticles GmbH offers the custom made covalent coupling of other proteins (protein A, hIgG, trypsin, BSA, ...) to carboxylated superparamagnetic particles. Upon request, we also manufacture superparamagnetic particles with reduced autofluorescence which are suitable for flow-cytometry.

The currently available spectrum of monodisperse superparamagnetic particles is listed in the product tables as given below:

Pack sizes:

  • Aqueous dispersions
    (25 mg/ml): 5 ml, 10 ml, 15 ml (MAG, 0,3 - 0,99 µm)
    (50 mg/ml): 5 ml, 10 ml, 15 ml (MAG, 1 - 10 µm)
  • Aqueous dispersions
    (25 mg/ml): 5 ml, 10 ml, 15 ml (MAG-COOH, 0,3 - 0,99 µm)
    (50 mg/ml): 5 ml, 10 ml, 15 ml (MAG-COOH, 1 - 10 µm)
  • Aqueous dispersions
    (10 mg/ml): 1 ml, 5 ml, 10 ml (MAG-SA, 0,3 - 10 µm)
-> Other modifications (proteins, oligonucleotides) and particle diameters than listed in the tables upon request.
Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
Solids
Content
(wt.-%)
Details
PS-MAG-S18500,2700,0145,3>402,5Details
PS-MAG-S19830,3600,0113,0>402,5Details
PS-MAG-S1984-10,5360,0214,5>302,5Details
PS-MAG-S16451,330,075,2>305Details
PS-MAG-S21803,900,133,3>305Details
PS-MAG-AR10195,010,153,0>205Details
PS-MAG-S287410,430,212,0>205Details
PS-MAG-S198518,820,402,1>155Details
PS-MAG-S198641,130,761,8>255Details
PS-MAG-S230367,40,91,4>105Details
PS-MAG-AR11089,01,20,9> 105Details
PS-MAG-S23051351,41,6>7,55Details
PS-MAG-AR1112563,41,3> 305Details
PS-MAG-S23073757,11,9>55Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
PS-MAG-COOH-S20030,2700,0145,3>40>502,5Details
PS-MAG-COOH-S19780,3600,0113,0>40>502,5Details
PS-MAG-COOH-S1979-10,5360,0214,5>30>502,5Details
PS-MAG-COOH-S24721,430,074,9>30>505Details
PS-MAG-COOH-AR4884,540,184,0>20>505Details
PS-MAG-COOH-S246710,310,252,4>20>505Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
Binding Cap.
for FITC-Biotin
(pmol/mg)
Solids
Content
(wt.-%)
Details
PS-MAG-SA-S20030,2700,0145,3>40>40001Details
PS-MAG-SA-S19780,3600,0113,0>40>40001Details
PS-MAG-SA-S1979-10,5360,0214,5>30>30001Details
PS-MAG-SA- S24721,430,074,9>30>12001Details
PS-MAG-SA-AR4884,540,184,0>20>4001Details
PS-MAG-SA-S13196,240,182,9>20>20001Details
PS-MAG-SA-S246710,310,252,4>20>3001Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
Solids
Content
(wt.-%)
Details
SiO2-MAG-S25600,5100,035,5>302,5Details
SiO2-MAG-AR3590,9600,055,2>252,5Details
SiO2-MAG-S25451,510,053,3>255Details
SiO2-MAG-S23022,470,072,9>255Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
SiO2-MAG-COOH-S25482,610,124,6>20>505Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
Binding Cap.
for FITC-Biotin
(pmol/mg)
Solids
Content
(wt.-%)
Details
SiO2-MAG-SA-S25482,610,124,6>20>10001Details


PS-MAG-FluoYellow-COOH-S2467; diameter 10,31 µm. (top without; and bottom under the influence of an external magnetic field)
 

Superparamagnetic Fluorescent Polymer Particles

MicroParticles GmbH now offers a series of superparamagnetic polystyrene-based fluorescent particles. Currently, these newly developed monodisperse particles come in the nominal diameter range from 1 through 10 microns. The particle surfaces possess COOH-functionalities, thus providing the possibility to couple proteins, such as trypsin, streptavidin, or ssDNA. The particle core consists of a polystyrene matrix (PS) with incorporated nanosized iron oxide. The surface of the particles is sealed with a hydrophilic, COOH-containing polymer shell up to a thicknes of several 100 nm. This sealing prevents leaching of iron oxide into the surrounding medium. Moreover, the polymer coat contains the fluorophore with various colors available. More significant properties of the new magnetic microparticles are:

  • Narrow size distribution (C.V. < 5 %) and absolutely spherical shape.
  • Superparamagnetism.
  • Excellent dispersibility in aqueous systems (pH > 7).
  • High fluorescence intensity with various fluorophores.
  • High reactivity of the COOH groups at the particle surfaces.

Pack sizes:

  • PS-MAG-Fluo-COOH, PS-MAG-Fluo: aqueous dispersions (10 mg/ml); 1 ml, 5 ml, 10 ml
  • PS-MAG-Fluo-SA: aqueous dispersions (10 mg/ml); 1 ml, 5 ml, 10 ml
-> Surface modifications or other colors and particle diameters than listed in the table upon request.

 

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
COOH

(µmol/g)
Solids
Content
(wt.-%)
Details
PS-MAG-FluoRed-COOH-S24511,430,074,9> 30> 501Details
PS-MAG-FluoYellow-COOH-S24511,430,074,9> 30> 501Details
PS-MAG-FluoRed-COOH-AR4884,540,184,0> 20> 501Details
PS-MAG-FluoYellow-COOH-AR4884,540,184,0> 20> 501Details
PS-MAG-FluoRed-COOH-S246710,310,252,4> 20> 501Details
PS-MAG-FluoYellow-COOH-S246710,310,252,4> 20> 501Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
Binding Cap.
for FITC-Biotin
(pmol/mg)
Solids
Content
(wt.-%)
Details
PS-MAG-FluoRed-SA-S24511,430,074,9> 30> 12001Details
PS-MAG-FluoYellow-SA-S24511,430,074,9> 30> 12001Details
PS-MAG-FluoRed-SA-AR4884,540,184,0> 20> 3001Details
PS-MAG-FluoYellow-SA-AR4884,540,184,0> 20> 3001Details
PS-MAG-FluoRed-SA-S246710,310,252,4> 20> 3001Details
PS-MAG-FluoYellow-SA-S246710,310,252,4> 20> 3001Details

Product
Name
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Iron Oxide
Content
(wt.-%)
Solids
Content
(wt.-%)
Details
PS-MAG-RhB-S25401,290,054,2> 251Details
PS-MAG-RhB-S25384,690,204,3> 201Details
PS-MAG-RhB-S253910,600,212,0> 201Details

Optical micrograph (transmission) of colored polystyrene particles (diameter 26 µm, scale bar 50 µm)
 

 
Optical micrographs (reflection) of colored polystyrene particles (diameter 100 µm)
 

Colored Particles

Colored polymer particles is a new product line of microParticles GmbH. The intensely dyed monodisperse particles have been developed for use in applications like filter testing, flow tracing, medical diagnostics, and biotechnology. The particles, based on polystyrene and polystyrene copolymers, are produced with microParticles' own technology platform and come in a wide variety of sizes, dyes, and functionalities. Using specifically designed dyeing processes, intensely colored particles with complete dye retention are obtained. The new particles come as 5 wt.-% aqueous dispersions. With larger beads, also dry powders are available. The main product characteristics include:

  • Size range from 500 nm to 1000 µm.
  • Currently dark blue and dark red colors available
  • Narrow size distribution (CV < 3%).
  • High lot-to-lot reproducibility.
  • Spherical particles with smooth surface.
  • Surface functionalities (carboxyl, amino, and epoxy groups) available on request.

Pack sizes:

  • Aqueous dispersions (50 mg/ml):
    10 ml, 15 ml, 50 ml
  • Powders:
    500 mg, 750 mg, 2500 mg (>5 µm)
-> Surface modifications or other colors and particle diameters than listed in the table upon request.
Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-Blue-1.0PS-FB-Fi3071,040,033,35Details
PS-Blue-2.0PS-FB-B9511,940,042,05Details
PS-Blue-2.0PS-FB-L12552,170,041,95Details
PS-Blue-4.0PS-FB-L11344,210,112,65Details
PS-Blue-9.5PS-FB-B14079,550,080,95Details
PS-Blue-12.5PS-FB-Fi25012,450,110,95Details
PS-Blue-20.0PS-FB-L273719,980,180,95Details
PS-Blue-26.5PS-FB-Fi12626,370,291,95Details
PS-Blue-32.0PS-FB-L242832,200,601,95Details
PS-Blue-41.5PS-FB-L273841,680,521,05Details
PS-Blue-52.0PS-FB-Fi27652,220,561,15Details
PS-Blue-60.0PS-FB-L273959,70,151,55Details
PS-Blue-80.0PS-FB-Fi26879,11,41,85Details
PS-Blue-110.0PS-FB-SA431071,71,65Details

Product
Name
Batch
No.
Mean
Diameter
(µm)
Standard
Deviation
(µm)
CV

(%)
Solids
Content
(wt.-%)
Details
PS-Red-2.0PS-FR-Fi2562,210,031,35Details
PS-Red-5.0PS-FR-Fi2015,210,142,85Details
PS-Red-7.0PS-FR-Fi2527,140,070,95Details
PS-Red-7.5PS-FR-KM1477,500,091,25Details
PS-Red-10.0PS-FR-KM1219,780,121,25Details
PS-Red-10.5PS-FR-Fi23210,470,080,85Details
PS-Red-12.5PS-FR-Fi25312,480,110,95Details
PS-Red-20.0PS-FR-L285819,900,150,85Details
PS-Red-25.5PS-FR-Fi31025,590,210,85Details
PS-Red-31.0PS-FR-Fi25430,930,391,25Details
PS-Red-41.0PS-FR-Fi21741,110,51,25Details
PS-Red-80.0PS-FR-Fi26978,921,01,35Details
PS-Red-100.0PS-FR-B1190981,11,15Details
PS-Red-100.0PS-FR-Fi98991,11,25Details
PS-Red-110.0PS-FR-SA421061,91,85Details

Contract Research and Development

The team of microParticles GmbH consists of scientists, engineers, and technicians with more than 30 years experience in colloid and polymer chemistry, particle technology as well as in surface modification and characterization of nano- and microparticles. This expertise and the tight cooperation with leading research institutions make microParticles GmbH the qualified partner for challenging research and development tasks. In addition to the products from our wide portfolio, we also offer:

  • Contract research and development
  • Customized particle preparation
  • Design, development, and manufacture of novel particle types
  • Encapsulation of active agents/components
  • Technical support and assistance in all particle-related respects.