Atomic scale imaging of monocrystalline Si (001) surface by molecular dynamic simulation
DouJianHua, LiangYingChun, BaiQingShun, GongNa, DongShen
Center for Precision Engineering, Harbin Institute of Technology, Harbin 150001, China
Abstract:
Non-contact atomic force microscopy(nc-AFM) atomic-scale imaging process of monocrystalline silicon surface using capped single-wall carbon nanotube tip is simulated by molecular dynamic method. The simulation results show that the nc-AFM imaging force mainly comes from the C-Si and C-C chemical covalent bonding forces, especially the former, the nonbonding Van der Waals force change is small during the range of stable imaging height. When the tip-surface distance is smaller than the stable imaging height, several neighboring carbon atoms at the tip apex are attracted, and some of them jump onto the sample surface. Finally the tip apex configuration is destroyed with the tip indenting further.
Key words: molecular dynamic simulation carbon nanotube imaging non-contact AFM
DOI：10.11916/j.issn.1005-9113.2009.06.026
Clc Number:TB302
Fund:
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Atomic scale imaging of monocrystalline Si (001) surface by molecular dynamic simulation
本站小编 哈尔滨工业大学/2019-10-23
相关话题/Atomic scale imaging monocrystalline Si
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