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Nanomaterials

Metal & Alloy Nanopowders

Metal and alloy nanopowders and micropowders with defined average particle size, from 18 nm to several microns, for catalysis and materials.
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At nanometre sizes, metals melt at lower temperatures, react faster and interact with light in new ways. This sub-category supplies metal and alloy nanopowders along with finer micropowders. Aluminium is offered across a wide size ladder, with nanopowders at APS 18 nm, 40 nm, 70 nm, 100 nm and 200 nm, a 1-3 µm grade and a 40-50 µm micropowder. Bismuth nanopowder at 40-60 nm is also listed.

Average particle size (APS) is the headline figure, but the size distribution, surface oxide layer and degree of agglomeration matter just as much. Metal nanoparticles form a thin oxide shell, which reduces the metallic content, so purity may be quoted on a metals basis. Applications include energetic materials research, conductive inks, catalysis and sintering aids.

  • Nanopowders for reactive and catalytic studies
  • Fine powders for conductive pastes and inks
  • Micron grades for comparison and scale-up

Reactive nanopowders are sealed under argon and shipped as flammable solids. Each lot ships with a COA and SDS.

Metal & Alloy Nanopowders: questions buyers ask

Why does a metal nanopowder have lower purity than its bulk form?
Every metal nanoparticle carries a thin native oxide layer, and at very small sizes this oxide makes up a meaningful share of the mass. Surface-adsorbed moisture and passivation agents add to it. Purity is therefore often quoted on a metals basis, with active metal content given separately where measured.
How should aluminium nanopowder be handled safely?
Aluminium nanopowder can ignite in air and forms explosive dust clouds. Open containers only in an argon glovebox or under controlled passivation conditions. Avoid static, sparks and water, and use a class D extinguisher for metal fires. Follow the SDS closely and keep quantities in use small.
How do I disperse metal nanopowders in a liquid?
Use ultrasonication in a compatible solvent with a suitable dispersant or capping agent, adding powder gradually. Water may react with some metals, so organic solvents are often preferred. Measure the result by dynamic light scattering, and expect some residual agglomerates that may need filtering or centrifugation.

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