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Study on the Mophology Observation and Electrical Properties of Dipyridinium Organic Monolayer Using STM  

Lee Nam-Suk (동아대학 전기공학과)
Shin Hoon-Kyu (동아대학 전기공학과)
Kwon Young-Soo (동아대학 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.54, no.2, 2005 , pp. 51-54 More about this Journal
Abstract
In this work, the attempt has been made to investigate the morphology of self-assembled dipyridinium dithioacetate on Au(111) substrate by Scanning Tunneling Microscopy(STM). Also, we measured electrical properties(I-V) using Scanning Tunneling Spectroscopy(STS). Sample used in this experiment is dipyridinium dithioacetate, which contains thiol functional group, this structure that can be self-assembled easily to Au(111) substrate. The self-assembly procedure was used for two different concentrations, 0.5 mM/ml and 1 mM/ml. Dilute density of sample by 0.5 mM/ml, 1 mM/ml and observed dipyridinium dithioacetate's image by STM after self-assembled on Au(111) substrate. The structure of STM tip-SAMs-Au(111) substrate has been used measurement for electrical properties(I-V) using STS. The current-voltage(I-V) measurement result, observed negative differential resistance(NDR) properties.
Keywords
Scanning Tunneling Microscopy (STM); Self-Assembly(SA); Negative Differential Resistance(NDR);
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Times Cited By KSCI : 1  (Citation Analysis)
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