| Title |
Study on the Mophology Observation and Electrical Properties of Dipyridinium Organic Monolayer Using STM |
| Authors |
이남석(Lee Nam-Suk) ; 신훈규(Shin Hoon-Kyu) ; 권영수(Kwon Young-Soo) |
| Keywords |
Scanning Tunneling Microscopy (STM) ; Self-Assembly(SA) ; Negative Differential Resistance(NDR) |
| 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. |