Melamine nanospheres and microspheres with carboxy functional surfaces
    The melamine nanospheres and microspheres have been modified to have a high density of carboxy functional groups.    Melamine nanospheres and microspheres with carboxy group terminated surfaces are used for various conjugation reactions in biomedical research, biotechnology in development of variety of assays, microarray technology etc.    Our melamine particles have the following properties:
     
    ○   COOH groups  :  1mM/g
    ○   Density  :  1.51 g/cm3
    ○   Refractive Index  :  1.68
    ○   Highly spherical with C.V.  <3 %
    ○   High temperature stability up to 250°C
    ○   Excellent mechanical strength
    ○   Compatible with majority of inorganic
    ○   and organic solvents
    ○   Low non-specific protein adsorption
    ○   Good colloidal stability over a wide range
    ○   of pH values and ionic strength .
    ○   Available sizes  :  500nm - 10µm
     
     

    Scanning Electron Microscopy image of 1.00um Melamine- microspheres with carboxy functional surfaces
 
Carboxy Functional Melamine Nanospheres : Size Range 50nm - 1000nm
Catalog # Size, [nm] Quantity Concentration Product ID
360511-10 500 10 ml 5 % C-MF-0.50COOH
360513-10 550 C-MF-0.55COOH
360511-10 600 C-MF-0.60COOH
360513-10 650 C-MF-0.65COOH
360515-10 700 C-MF-0.70COOH
360517-10 750 C-MF-0.75COOH
360519-10 800 C-MF-0.80COOH
360521-10 850 C-MF-0.85COOH
360523-10 900 C-MF-0.90COOH
360525-10 950 C-MF-0.95COOH
 
Carboxy Functional Melamine Microspheres : Size Range 1µm - 100µm
Catalog # Size, [µm] Quantity Concentration Product ID
360611-10 1.00 10 ml 5 % C-MF-1.00COOH
360613-10 1.25 C-MF-1.25COOH
360611-10 1.50 C-MF-1.50COOH
360613-10 1.75 C-MF-1.75COOH
360615-10 2.00 C-MF-2.00COOH
360617-10 2.25 C-MF-2.25COOH
360619-10 2.50 C-MF-2.50COOH
360621-10 3.00 C-MF-3.00COOH
360623-10 3.50 C-MF-3.50COOH
360625-10 4.00 C-MF-4.00COOH
360627-10 4.50 C-MF-4.50COOH
360629-10 5.00 C-MF-5.00COOH
360631-10 6.00 C-MF-6.00COOH
360635-10 7.00 C-MF-7.00COOH
360637-10 8.00 C-MF-8.00COOH
360639-10 9.00 C-MF-9.00COOH
360641-10 10.00 C-MF-10.00COOH
 
 

Useful data 1

Assumptions :
(a) all particles are perfect spheres,
(b) molecular level smooth surfaces and
(c) one functional group per nm2 surface  (from structural data)
Diameter, [nm] Mass of one particle, [g] Number of particles/g Number of NH groups/particle Number of NH groups/g NH groups, µmoles/g
500 9.8829E-14 1.01E+13 7.85E+05 7.95E+18 13.20
550 1.3154E-13 7.60E+12 9.50E+05 7.22E+18 12.00
600 1.7078E-13 5.86E+12 1.13E+06 6.62E+18 11.00
650 2.1713E-13 4.61E+12 1.33E+06 6.11E+18 10.15
700 2.7119E-13 3.69E+12 1.54E+06 5.68E+18 9.43
750 3.3355E-13 3.00E+12 1.77E+06 5.30E+18 8.80
800 4.0480E-13 2.47E+12 2.01E+06 4.97E+18 8.25
850 4.8555E-13 2.06E+12 2.27E+06 4.67E+18 7.77
900 5.7637E-13 1.73E+12 2.54E+06 4.42E+18 7.33
950 6.7787E-13 1.48E+12 2.84E+06 4.18E+18 6.95
1000 7.9063E-13 1.26E+12 3.14E+06 3.97E+18 6.60
1250 1.5442E-12 6.48E+11 4.91E+06 3.18E+18 5.28
1500 2.6684E-12 3.75E+11 7.07E+06 2.65E+18 4.40
1750 4.2373E-12 2.36E+11 9.62E+06 2.27E+18 3.77
2000 6.3251E-12 1.58E+11 1.26E+07 1.99E+18 3.30
2250 9.0058E-12 1.11E+11 1.59E+07 1.77E+18 2.93
2500 1.2354E-11 8.09E+10 1.96E+07 1.59E+18 2.64
3000 2.1347E-11 4.68E+10 2.83E+07 1.32E+18 2.20
3500 3.3898E-11 2.95E+10 3.85E+07 1.14E+18 1.89
4000 5.0601E-11 1.98E+10 5.03E+07 9.93E+17 1.65
4500 7.2047E-11 1.39E+10 6.36E+07 8.83E+17 1.47
5000 9.8829E-11 1.01E+10 7.85E+07 7.95E+17 1.32
6000 1.7078E-10 5.86E+09 1.13E+08 6.62E+17 1.10
7000 2.7119E-10 3.69E+09 1.54E+08 5.68E+17 0.94
8000 4.0480E-10 2.47E+09 2.01E+08 4.97E+17 0.83
9000 5.7637E-10 1.73E+09 2.54E+08 4.42E+17 0.73
10000 7.9063E-10 1.26E+09 3.14E+08 3.97E+17 0.66