1.
Materials (Basel)
; 6(1): 198-205, 2013 Jan 14.
Artigo
em Inglês
| MEDLINE
| ID: mdl-28809302
RESUMO
The chemical synthesis of gold nanoparticles (NP) by using gold (III) chloride trihydrate (HAuClâ3H2O) and sodium citrate as a reducing agent in aqueous conditions at 100 °C is presented here. Gold nanoparticles areformed by a galvanic replacement mechanism as described by Lee and Messiel. Morphology of gold-NP was analyzed by way of high-resolution transmission electron microscopy; results indicate a six-fold icosahedral symmetry with an average size distribution of 22 nm. In order to understand the mechanical behaviors, like hardness and elastic moduli, gold-NP were subjected to nanoindentation measurements-obtaining a hardness value of 1.72 GPa and elastic modulus of 100 GPa in a 3-5 nm of displacement at the nanoparticle's surface.