Everything about Microspheres
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  • Use of Polyethylene Spheres for Analyzing Microplastic Transport in Correlation with Earthworm Presence

    Work by Matthias C. Rillig, Lisa Ziersch, and Stefan Hempel at Freie Universität and Brandenburg Institute of Advanced Biodiversity Research in Berlin has been published in an article titled Microplastic transport in soil by earthworms. This article investigates earthworms effect on microplastic movement into subsurface soil layers.

    Polyethylene Microplastic

    With the increase in plastic usage in recent decades the issue of how this discarded plastic will affect marine environments has been studied extensively. However, effects of microplastics on soil environments have not been tested to the same extent. Scientists have begun testing microplastic movement into lower soil layers by analyzing how differing sized polyethylene beads moved in a 21-day period with and without earthworm facilitation.

    The experiment was designed to confirm the assumption that earthworms would aid in particle movement. Results found earthworms to have a significant positive effect on transporting polyethylene particles from the soil surface. While particle size was also an important factor on the level of transportation into subsurface environments. With polyethylene spheres in the size range 710-850um being significantly more likely to move into the lowest layer when earthworms were present.

    With this experiment showing the ability of earthworms to transport microplastics into subsurface layers more research needs to be done to determine the effects this may have on the soil environment and the worms themselves. Including the multitude of other organisms that could also facilitate similar transportation. As well as the possibilities of microplastics reaching ground water where problems similar to those realized in marine systems could occur.

  • Large Polystyrene Spheres Available

    Large Polystyrne SpheresHigh Quality precision Large Polystyrene Spheres now available.

    Sizes of 2mm and 4.4mm.

    Having a density of 1.05g/cc size ranges as narrow as CV=0.2% these are excellent for research applications

  • Bichromal Janus Particles, Microspheres, Microbeads – Stock selection or Custom-made

    Bichromal (half-white half-black or any other color) Microspheres, Janus Particles

    Bichromal (half-white half-black or any other color) Microspheres, Janus Particles. In this picture - Paramagnetic black microspheres with partial white coating - Magnification 40x.

    Cospheric offers unique capability to manufacture Janus microspheres and microparticles with partial coatings and dual functionality. Currently half-shell or hemispherical coatings can be applied to any sphere (glass, polymer, ceramic) in sizes 45micron in diameter and higher. Coatings can be customized for any color and coverage of between 20% to 60% of the sphere. Each coating is custom formulated for color, charge, magnetic, electric, and surface properties, and solvent resistance per customers’ needs.

    Half-coated glass microspheres - Partial coating on glass particles

    Half-coated glass microspheres - Partial coating on glass particles. In this picture - Soda lime glass microspheres with partial red coating - Magnification 40x.

    Hemispherical coatings of less than 1 micron with tolerances as low as 0.25 micron have been routinely demonstrated.  Color combinations are truly unlimited. White, black, silver, blue, green, red, yellow, brown, purple as well as transparent microspheres have been made. Sphericity of greater than 90% and custom particle size ranges are offered.

    We have successfully coated solid and hollow glass microsphere, including soda-lime, borosilicate, and barium titanate glass microspheres. We have also coated on silver.

    Half-coated Microspheres

    Half-coated Microspheres

    Optically anisotropic spheres and janus particles with magnetic half-shells have been originally developed for applications in electronic displays, such as e-paper, but are now widely used in numerous applications in diagnostics, medical research, microscopy and biotechnology, as well as electronics, due to their ability to orient themselves in response to electromagnetic field and show a visual response. This is achieved by making spheres both bipolar and bichromal, with dipole precisely aligned with two differently colored hemispheres. As the spheres align themselves, the viewer will observe the color of one hemisphere, while the other hemisphere will be hidden from view, providing an obvious strong visible indication of the presence of the field or other stimuli.  In alternating electromagnetic field, these microspheres have been proven to spin at hundreds of times per second.

  • Market Research Report – Microspheres: Technologies and Global Markets – 2013


    In summer of 2013 BCC Research has issued an updated market research report on Microspheres: Technologies and Global Markets. According to the report, the global market for microspheres was estimated to total nearly $2.2 billion in 2012 and is projected to increase to $2.4 billion in 2013; the market should total $4.4 billion by 2018 and have a five-year compound annual growth rate (CAGR) for of 12.6%.

    This report provides:

    • An overview of the global market and technologies for microspheres, which are spherical microparticles used as components in many advanced materials and composites, in the healthcare and personal care industries, and in many specialty research and development applications.
    • Analyses of global market trends, with data from 2012, estimates for 2013, and projections of compound annual growth rates (CAGRs) through 2018.
    • Identification of a variety of types of microspheres available on the market, as well as relevant industries, technologies and applications.
    • Examination of demand for microspheres in six major industries: composites, paints and coatings, oil and gas, cosmetics and personal care, biotechnology and life sciences, and medicine and medical devices.
    • Descriptions of different types of microspheres with respect to their chemical composition, including glass, ceramic, and polymer microspheres, and unique material properties that make them suitable for specific industries and applications.

    ($ MILLIONS)
    To submit your query click here


    BCC analyzes the global market for microspheres from both the manufacturing and demand points of view. Since there are several types of microspheres that vary drastically in quality, chemical properties, functionality and price, each type of microsphere is discussed in detail, including materials, manufacturing processes, advantages, prices and primary applications. Similarly, due to these variations microsphere use in six major industries are discussed and analyzed in detail.

    Detailed analysis and market forecasts are provided per industry, type of microsphere and geographic region through 2018. The report describes major players in the industry and examines recent advances in technology, newly evolving markets and companies as well other factors influencing supply and demand.

    This report analyzes microspheres—homogeneous microparticles of 1 micron to 1,000 microns in diameter. Microspheres can be solid or hollow and made from a variety of raw materials.


    BEWARE of rip-off reports that have been published this year by Research and Markets, Transparency Market Research, and other non-USA-based research firms, they contain partially plagiarized (reworded) and some completely inaccurate information.

    This authentic and accurate report was published by BCC research – a leading market research company specializing in reporting on changes driven by science and technology.  The analyst for this report is an expert in the field of microspheres. Yelena Lipovetskaya, CTO of Cospheric LLC, has more than 15 years of experience taking new technologies from concept to production in a variety of industries, including rotating microspheres electronic paper, charged microparticles for printing toner, digital displays, optical fiber, and medical devices.

    Yelena is the author of numerous applications, patents and published articles on microspheres technology and its applications and has held technical and managerial positions at Xerox Corp, Corning Inc., Cardinal Health, Gyricon, and Cbrite Inc. Yelena has a Bachelor’s degree in Chemical Engineering from Polytechnic University and a Master’s degree in Materials Science and Engineering from Rochester Institute of Technology, both in New York.

  • PIV Seeding – Microparticle Recommendations

    Flow Visualization can best be accomplished with colored or fluorescent tracing particles of the same density as the fluid being studied.Particle image velocimetry (PIV) is the term used for imaging the fluid flow using colored tracer particles.  Through high speed particle imaging the velocity of the particles can be obtained and mapped.

    Photo Courtesy of Wiki-CommonsFor PIV experiments in water there are a wide variety of 1g/ml microspheres available as seeding particles, Cospheric offers polyethylene seeding particles in a variety of colors (fluorescent and non-fluorescent) and sizes from 10-20um, on up to 1mm.

    Particle size selection is important to ensure that observations can be accurately made.  For imaging systems without any magnification or unaided human observation it is recommended to use micro-spheres that are larger than 200um.   Human eyes can resolve features down to about 75um, at 200um+ the particles will be large enough to be discernible.

    Correctly seeding the system is also important.  For most applications loadings of 0.1-0.3% are sufficient.  This is the equivalent of about 1 gram of particles per gallon of fluid in systems of 10-50 gallons (40-200 liters) .  Exact loading levels will depend on the individual experiment requirements.

    For aqueous systems, polyethylene micro-particles will require a surfactant to wet properly.  For general flow studies pre-wetting the PE microspheres with Simple Green concentrated cleaner works well.  For biological systems a bio-compatable surfactant such as Tween 20 or Tween 80 is recommended.

    Seeding particle color selection is important to ensure that sufficient contrast is achieved during testing.  Very bright fluorescent micro-particles are available in densities of 1g/cc  these offer not only bright testing under daylight conditions, but also the option of illumination with lasers or uv lights for increased system contrast.

    The recommended PIV seeding particles are available from Cospheric.

    For green lasers (530nm)  we recommend UVPMS-BR
    For dark backgrounds: UVPMS-BY, UVPMS-BG, BLPMS, ORGPMS, BSPMS, or WPMS
    For light backgrounds: GRYPMS, VIOPMS, UVPMS-BR, UVPMS-BO