A fine white powder composed of silicon oxide particles ranging from 10-30nm in diameter, this material is perhaps one of the most versatile and adjustable nanomaterials on the market. 

• Composite materials: the high versatility of silica nanoparticles in their many configurations make them a key ingredient in the production of many different composite materials. The list includes, but isn’t limited to concretes, glasses, ceramics, alloys, plastics, and rubbers.
• Paint: silica nanoparticles have been extensively used in various paints to improve opacity and help add a smooth, glossy finish to the completed product.

"Silicon Oxide Nanoparticles/Nanopowder (SiO2, 99.5%, 10-20 nm, porous)" -Retrieved 4/2/2021 from https://www.ssnano.com/inc/sdetail/silicon_oxide_nanoparticles__silicon_oxide_nanopowder___sio2__99_5___10_20nm_/2522

available online (see '6807NM Silicon Oxide Nanoparticles/Nanopowder MSDS for Download')