Chin. Phys. Lett.  2001, Vol. 18 Issue (1): 137-139    DOI:
Original Articles |
Scanning Tunnelling Microscopy Observation on 10,12-Tricosadiynoic Acid Monolayers Deposited by Schaefer’s Method
ZHANG Geng-Min
Department of Electronics, Peking University, Beijing 100871 and Osaka University, Osaka, Japan
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ZHANG Geng-Min 2001 Chin. Phys. Lett. 18 137-139
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Abstract 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.



Keywords: 85.65.+h      07.79.Cz     
Published: 01 January 2001
PACS:  85.65.+h (Molecular electronic devices)  
  07.79.Cz (Scanning tunneling microscopes)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I1/0137
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