摘要
The Langmuir-Blodgett monolayers of 10,12-tricosadiynoic acid molecules were deposited onto the basal plane of highly oriented pyrolytic graphite(HOPG)by Schaefer’s method and then observed with the scanning tunnelling microscope(STM).With a view to achieving a parallel molecular arrangement on the graphite surface,the deposition was deliberately conducted at a relatively low surface pressure.As exhibited by the STM images,by this approach the 10,12-tricosadiynoic acid molecules could constitute an ordered structure with their molecular chains lying parallel to the substrate.The model of molecular dimer is put forward for the interpretation of the observed phenomena.
作者
张耿民
ZHANG Geng-Min(Department of Electronics,Peking University,Beijing 100871 and Osaka University,Osaka,Japan)
基金
Supported by the National Natural Science Foundation of China under Grant No.69701001
Monbusho of Japan.