文献类型：期刊文献

中文题名：Image Contrast Inversion of a Solvent Cast SEBS Film

英文题名：Image Contrast Inversion of a Solvent Cast SEBS Film

作者：韩霞[1];徐建[1];刘洪来[1];胡英[1]

机构：[1]Department of Chemistry and State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2006

卷号：24

期号：1

起止页码：149

中文期刊名：Chinese Journal of Chemistry

外文期刊名：中国化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

基金：Project supported by the National Natural Science Foundation of China （Nos. 20236010, 20476025 and 20490200） and the Shanghai Municipal Education Commission of China.

语种：中文

中文关键词：copolymer thin film;image contrast inversion;atomic force microscopy

外文关键词：copolymer thin film, image contrast inversion, atomic force microscopy

摘要：The image contrast inversion was investigated in detail when soft polymeric materials were imaged with tapping mode atomic force microscopy （TM-AFM）. Solvent cast film of polystyrene-block-poly（ethylene/butylene）block-polystyrene （SEBS） triblock copolymers was used as a model system in this study, which showed phase separation domains with a size of several tens of nanometers. AFM contrast reversal process, through positive image, to an intermediary and till negative image, could be clearly seen in height images of the soft block copolymer using different tapping force. The higher tapping force would lead to not only contrast inversion, but also the different size of the microdomains and different roughness of the images. Moreover, contrast inversion was explained on the basis of attractive and repulsive contributions to the tip-sample interaction and indentation of the soft domains.
The image contrast inversion was investigated in detail when soft polymeric materials were imaged with tapping mode atomic force microscopy （TM-AFM）. Solvent cast film of polystyrene-block-poly（ethylene/butylene）block-polystyrene （SEBS） triblock copolymers was used as a model system in this study, which showed phase separation domains with a size of several tens of nanometers. AFM contrast reversal process, through positive image, to an intermediary and till negative image, could be clearly seen in height images of the soft block copolymer using different tapping force. The higher tapping force would lead to not only contrast inversion, but also the different size of the microdomains and different roughness of the images. Moreover, contrast inversion was explained on the basis of attractive and repulsive contributions to the tip-sample interaction and indentation of the soft domains.