Silver nanoparticles have been synthesized using glucose but the resulting colloid is dark gray. Are the particles composed of micrometer? Or due to the non-spherical colloids is it this color?
I get very transparent yellow colloids using other methods (for example polyol method or reduction with sodium borohydrate) but it is not possible to separate the nanoparticles from the yellow solution. The resulting powder is not in operation. I need to produce a product that is a powder of silver nanoparticles. Please guide.
Try sodium citrate in boiling aqueous solution of silver ion precursor, it might work somehow
Sodium citrate is a protecting agent, isnt it?
Also, I have used a lot of PVP for synthesis this nanoparticles. Is it still possible to agglomrate the particles are there?
The dark gray color of the colloid can be due to the formation of nano structures like dendrites etc comprised of spherical nano particles.
Parastoo Mouchani You cannot have a 'powder of silver nanoparticles'.
Period. 'Nanopowder' is an oxymoron. There are no free, independent, discrete particles < 100 nm in a powder. At best you'll have a collection of fused sub- and post-micron aggregates and agglomerates.
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