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Silica Microspheres
Silica Microspheres
Polysciences offers uniform, non-porous silica (SiO₂) microspheres available in nominal diameters of ~150 nm - 8 µm. These particles typically have size CVs of 10-15%.
Inorganic supports such as silica microspheres have become increasingly important for a variety of applications, including isolation of nucleic acids, cell separation, and immuno- and DNA-based assays.
They offer the combined benefits of a broad platform and the unique properties of a silica substrate:
- Flexible silanization chemistries
- Unique refractive index and density
- Low autofluorescence
- Low nonspecific binding of many biomolecules
- Hydrophilicity
- Ease of handling
Characteristics
Compositions
Surface Groups
Refractive Index
Density
Glass Transition Temp
Characteristics
: SiO₂, nonporous
: SiOH (non-functionalized); NH₂ or COOK; streptavidin
: ~ 1.43 - 1.46 (589 nm)
: 2.0 g/㎤
: >> 1000 ℃ (Reported value for bulk silica.)
Product Name
Size(Nom.Dia.)
Note
0.01 - 0.10 µm
5% Solids dispersions of amorphous silica particles in water with NaOH as a stabilizer