Computer simulations of atomic force microscopy: crystalline polymers and the effects of surface contaminants
作者:
Bobby G. Sumpter,
Coral Getino,
Donald W. Noid,
Bernhard Wunderlich,
期刊:
Macromolecular Theory and Simulations
(WILEY Available online 1993)
卷期:
Volume 2,
issue 1
页码: 55-76
ISSN:1022-1344
年代: 1993
DOI:10.1002/mats.1993.040020105
出版商: Hüthig&Wepf Verlag
数据来源: WILEY
摘要:
AbstractThe atomistic dynamics of the interaction of an atomic force microscopic (AFM) probe with a crystalline polyethylene surface was examined by using the molecular dynamics method. The results show that the internal dynamics of the polymer crystal is such that rapid relaxation occurs, providing for a large amount of structural reversibility and making it possible to perform nondestructive AFM experiments. However, surface and/or AFM tip defects or contaminants (such as those which can be induced by polar molecules adsorbed on the surface), can result in significant perturbations in the AFM images produced, causing large and sharp structures to appear on the surface topology. A rationale of the mechanisms responsible for the image distortions is presented, and a relationship to defects observed in AFM and STM experiments is given.
点击下载:
PDF
(1214KB)
返 回