Gold coated silica nanoparticles

Gold coated silica nanoparticles, 1 wt. % in water, 200 nm (non-porous silica), 20 nm (gold nanoparticles)

Gold coated silica nanoparticles, 1 wt. % in water, 800 nm (non porous silica), 20 nm (gold nanoparticles)

Gold coated silica nanoparticles, 1 wt. % in water, 600 nm (non-porous silica), 20 nm (gold nanoparticles)

Gold coated silica nanoparticles, 1 wt. % in water, 400 nm (non-porous silica), 20 nm (gold nanoparticles)