Affiliation:
1. College of Engineering Science and Technology, Shanghai Ocean University, Shanghai 201306, P. R. China
Abstract
Nanotechnology plays an important role in the development of modern science and technology. In this paper, the alloying process of Cu and Au nanoparticles with different diameters (Cu(100 Å) and Au(70 Å), Au(100 Å) and Cu(70 Å), Au(100 Å) and Cu(50 Å) Cu(100 Å) and Au(50 Å)) was investigated by molecular dynamics (MD) simulation. Cu and Au nanoparticles contact each other at 300 K. The melting temperature of the Cu and Au system is about 1160 K in which the nanoparticles of the studied systems fuse rapidly. At the same time, the lattice structure of nanoparticles is also changed from face-centered cubic (FCC) to amorphous. Furthermore, shrinkage ratio and gyration radius as well as potential energy changed dramatically when the temperature reached 1160 K. The potential energy shows that more energy is needed for Cu(100 Å)/Au(70 Å) system to reach the melting temperature. Besides, the change of relative gyration radius is related to the radius of nanoparticles.
Publisher
World Scientific Pub Co Pte Lt
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics