Paramagnetic Particles

Paramagnetic Polymer and Silica Particles – For Biomedical Research

Paramagnetic Polymer and Silica Particles - For Biomedical Research microParticles GmbH offers its customers a series of magnetic spheres. The particle matrix consists of either polystyrene or silica with homogeneously incorporated nanometer-sized iron oxide. Matrix core with magnetic shell particles are also offered upon request. Special surface coatings encapsulate the particles towards surrounding media thus preventing the leaching of iron species.

Key Features:

Size Range:

From 300 nm to 375 µm

Monodispersity:

CV < 5 %, with absolutely spherical shape

Particle Stucture:

Magnetic Core/Polymer Shell Matrix Core/Magnetic Shell (upon request)

Iron Oxide Content:

Can be adjusted, up to 50 wt.-%.

Saturation Magnetization:

500 nm: ~30 Am²/kg 5 µm: ~15 Am²/kg

Surface Properties:

Hydrophilic

Functionalization:

Plain, COOH, Streptavidine (SA)

Moreover, microParticles GmbH offers the custom-made covalent coupling of other proteins (protein A, hIgG, trypsin, BSA, ...) to carboxylated paramagnetic particles.

Upon request, we also manufacture paramagnetic particles with reduced autofluorescence, which are suitable for flow-cytometry.

Particle material MAG/MAG-COOH	Mean diameter [µm]	Particle concentration [wt-%]	Package size [ml]
PS, PMMA, Melamine resin, Silica	0.3 - 0.99	2.5	5 , 10 , 15
PS, PMMA, Melamine resin, Silica	> 1.0	5
Silica-SA	0.3 - 10.0	1