Effect of Temperature on Coalescence Behavior of Unsupported Gold Nanoparticles
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The coalescing behavior of gold nanoparticles was studied by employing molecular dynamics simulations based on a semi-empirical embedded-atom method. Investigations on the coalescing process of the faceted nanoparticles revealed that at relatively low-temperatures, plastic deformation by slip motion was the main mechanism of coalescence, while near the melting point, coalescence was preceded by local fluid motion. Different initial configuration and coalescing temperature have a substantial influence on the coalescing behavior, making different final structures such as twinned face-centered cubic or amorphous nanoparticles.
KeywordsNanoparticle Coalescence Molecular dynamics simulations
This work was supported by Basic Science Research Program (2017R1A2B4012871), Leading Foreign Research Institute Recruitment Program (2013K1A4A3055679), and the Priority Research Centers Program (2009-0093814) through the National Research Foundation of Korea (NRF).
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