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Home > FAQ and Resources > Frequently Asked Technical Questions - Microspheres and Nanospheres

Frequently Asked Technical Questions - Microspheres and Nanospheres

Q: How are microspheres and nanospheres shipped?

Most of our microsphere and nanosphere products are shipped in glass vials as a free-flowing dry powder. Density Marker Beads products are shipped in an aqueous solution.

Q: What are the shelf-life and storage requirements?

We recommend to store dry powder products in a cool dry place in a sealed container to minimize moisture and contamination.

Density Marker Beads should be refrigerated and used within 6 months of dated lot code for best results.

Q: Are any materials hazardous or require special shipping?

None of our products are hazardous or require special shipping.

Q: How many spheres per gram?

A table of calculated number of spheres per gram of material based on various microsphere diameters for glass and polymer microspheres can be found in Resources section under Spheres per Gram.

Q: Hydrophobicity of Microspheres (Wettability of spheres with water)

-Silica(SIO2MS)– Hydrophilic, no surfactant needed.

-FM Series - Fluorescent Powder (FM[X})– Hydrophilic, no surfactant needed.

-Soda Lime Glass (SLGMS)– Hydrophilic, no surfactant needed.

-Borosilicate Glass (BSGMS) – Hydrophilic, no surfactant needed.

-Barium Titanate Glass (BTGMS) – Hydrophilic, no surfactant needed.

-PMMA – Acyrlic – (PMPMS) – Hydrophilic, no or minimal surfactant needed.

-Hollow Glass (HGMS)– Hydrophilic, no surfactant needed.

-Silver Coated Spheres – Hydrophilic, no surfactant needed.

-Cellulose Acetate – Hydrophilic, no surfactant needed.

-Polyethylene (PE)-Hydrophobic, needs surfactant.

-Polypropylene (PP) -Hydrophobic, needs surfactant.

Q: Procedure for dispersing hydrophobic spheres in aqueous solution (suspension in water) for Particle Image Velocimetry (flow visualization) applications.

For non bio-sensitive industrial flow visualization applications:

Concentrated Simple Green all purpose cleaner can be used as a surfactant ( www.simplegreen.com)

Procedure: Cover dry spheres with concentrated simple green and let sit for approximately 5 min before dispersing in water.

For biocompatible aqueous dispersion applications:

Refer to Protocol for Preparing Tween Solutions of Hydrophobic Polyethylene Microspheres.

What are the typical applications of microspheres and nanospheres?

We regularly work with over a thousand customers from public and private organizations, national labs, universities all over the world. Most customers have unique applications targeted to their project and their industry. Here is a general overview of Microsphere Applications in Industry.

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About the Company:

Cospheric is a global leader in manufacturing and distribution of precision nanospheres, microspheres, and larger precision spherical particles. Scientists and engineers worldwide rely on us as a proven source to fulfill their needs for microparticles in narrow size ranges, wide selection of colors, densities, properties and formulations. We leverage our extensive technical expertise in micropowders to help each customer find an optimal microparticle solution for their needs. We ship worldwide daily out of our Santa Barbara, CA manufacturing facility.
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