Program

P.44 -- Poster, NCTP-41

Date: Wednesday, 3 August 2016

Time: 08h30 - 10h00

Growth of graphene by vapor deposition method and size effects on its structure.

Nguyen Hoang Giang (1), Vo Van Hoang (1), Le Nhu Ngoc (2)

(1) Comp. Phys. Lab, HochiMinh City Univ. of Technology-Vietnam National Univ.-HCM (2) Department of Physics, College of Natural Sciences, Can Tho University

We report MD simulation of growth of graphene by vapor deposition on BN. The systems (containing carbon vapor and BN substrate) are relaxed at high temperature (1500 K) then it cooling down to room one (300 K. Surface atoms interact with substrate via Lennard-Jones potential while the interaction between carbon atoms is computed via Tersoff potential. Depending on the size, different crystalline honeycomb structures have been found. Structural properties of the graphene obtained at 300K are studies by analyzing radial distribution function (RDF), coordination number, ring statistics, interatomic distance, bond-angle distribution and 2D visualization of atomic configurations. We find that although two models containing various numbers of atoms have a honeycomb structure, differences in structural properties of graphene formed by vapor deposition on substrate and free standing one can be found. Moreover, size effects on structure are significant. Acknowledgements: This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant 103.01-2014.86.

Presenter: Nguyen Hoang Giang