Artículos de revistas
Hardness and Elastic Modulus on Six-Fold Symmetry Gold Nanoparticles
Autor
ABEL HURTADO MACIAS
Institución
Resumen
The chemical synthesis of gold nanoparticles (NP) by using gold (III) chloride
trihydrate (HAuCl·3H2O) 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.