Crystallinity dynamics of gold nanoparticles during sintering or coalescence
Eirini Goudeli, Sotiris E Pratsinis
AICHE JOURNAL | WILEY-BLACKWELL | Published : 2016
The crystallinity of gold nanoparticles during coalescence or sintering is investigated by molecular dynamics. The method is validated by the attainment of the Au melting temperature that increases with increasing particle size approaching the Au melting point. The morphology and crystal dynamics of nanoparticles of (un)equal size during sintering are elucidated. The characteristic sintering time of particle pairs is determined by tracing their surface area evolution during coalescence. The crystallinity is quantified by the disorder variable indicating the system's degree of disorder. The atoms at the grain boundaries are amorphous, especially during particle adhesion and during sintering w..View full abstract
Awarded by Swiss National Science Foundation
Awarded by European Research Council under the European Union
The research leading to these results has received funding from the Swiss National Science Foundation (grant no. 200021_149144) and the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013, ERC grant agreement no. 247283). For this research, E. Goudeli received a best poster award from the Particle Technology Forum at the 2015 AIChE Annual Meeting in Salt Lake City, UT, Nov. 8-13.