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Formation Process Of Two-dimensional Crystalline Film Of Vacuum-evaporated N-alkane: A Molecular Dynamics Simulation

Hong-zhen Li, Zhao-xiang Wang, Dong-hua Jing, Xiang-he Kong, Ke-zhu Yan

Volume 2, Issue 5, Page 345-348, Year 2011 | DOI: 10.5185/amlett.2011.9101am2011

Keywords: n-alkane, two-dimensional film, substrate, molecular dynamics simulation, evaporation, single molecule,adsorption, conformation

Abstract: 

The formation of two-dimensional crystalline film of n-pentadecane (C15H32) on a flat substrate with attractive forces similar to that of the metals or graphite substrate is investigated with molecular dynamics simulation. By controlling the deposition rate of the molecules, we observed the behavior in adsorption and conformational change of single molecule and the growing process of the n-pentadecane film. Two distinct sub-processes are recognized in the formation of the crystalline film, the formation of the molecular clusters and the coalescence of the molecular clusters. It is found that the conformational changes are gentle when only or few molecules are deposited on the substrate. However, this change becomes drastic as more molecules are gathered together. The accelerated conformational variation is attributed to the no-bonding molecular interaction. Copyright © 2011 VBRI press.

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