Hi....to my understanding.... nanoscale Au can be produced by
various techniques...to name a few VCLDI, EEW, Chemical route,
phyiscal methods etc.... all these techniques doesnt yield
nanoparticles of same size, shape, purity etc.... generally
depending on the applications the synthesizing techniques is
chosen...and each technique has its own temp requirements....
and finally one technique which most widely used for nano
colloid preparation is thru reduction of Au(CN)3.. and this
process is room temperature....on the other hand plasma process
will require higher end temperature.... do correct me if i am
wrong... sorry for the delayed reply... i was suffering from
chicken pox and was nt in the lab for couple of weeks... by the
way... as for as mechnical grinding is concern... we have nt
tried in the my lab..i mean gold mech. grinding.. bt then.. as
such there is no much important is given to temperature...
furthermore since gold is very very ductile metal...mech
grinding will and should be done in cryo conditi