journal article·2020-04-02

Heating-Rate and Particle-Size Effects on Melting Process of Au Nanoparticles

Jixing Chen, Xiaofeng Fan, Jialin Liu, Changzhi Gu, Yunfeng Shi, David J. Singh, Weitao Zheng

The Journal of Physical Chemistry C· Volume 124· Issue 13
Publisher page

Abstract

The atomic mechanisms of the melting process of gold nanoparticles were investigated by molecular dynamics simulations. Melting under a high heating rate is found to be much different from the near equilibrium melting and is a typical overheating process. The melting begins with the formation of a premelting layer near the surface, and the interface of the solid and premelting layer drives the nucleation of the liquid into the interior of nanoparticles. The high heating rate causes solid–liquid coexistence in a large temperature interval. These imply that the melting process can be controlled effectively by different heating ways.
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Research context

OpenAlex topics: nanoparticles nucleation surface interactions · Advanced Thermodynamics and Statistical Mechanics · Material Dynamics and Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130012, China

Laboratory of Microfabrication, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Department of Material Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States

Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211-7010, United States

Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States

State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130012, China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China

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