Size Dependencies on Melting Dynamics of Gold Nanoparticle and Thin Film
Riser Fahdiran (a*), Iwan Sugihartono (a), Erfan Handoko (a), Setia Budi (b)

a) Department of Physics, State University of Jakarta, Jalan Rawamangun Muka, Jakarta Timur, 13220, Indonesia
* riser-fahdiran[at]unj.ac.id
b) Department of Chemistry, State University of Jakarta, Jalan Rawamangun Muka, Jakarta Timur, 13220, Indonesia

Abstract

We explore the size dependencies of melting dynamics of Gold in the form of nanoparticle and thin film. The sizes are 5 nm, 10 nm and 20 nm which is comparable between nanoparticle diameter and thin film thickness. The systems are treated by increasing temperature from 300 K to 1400 K. Molecular Dynamics (MD) scheme is employed to follow the trajectories of the systems up to 30 ps. Structure factor and pair distribution function analysis indicated that the melting is suppressed by the increasing size. Common Neighbor Analysis (CNA) confirmed the suppression from local crystal structure of every system.

Keywords: molecular dynamics; nanoparticle; thin film; metal; melting; size

Topic: Material Science