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KIEE international transactions on electrophysics and applications v.5C no.3, 2005년, pp.111 - 114   피인용횟수: 1

A Study on the Negative Differential Resistance in Dipyridinium Self-Assembled Monolayers Using STM

Lee Nam-Suk    (Dept. of Electrical Engineering, Dong-A University   ); Shin Hoon-Kyu    (Dept. of Electrical Engineering, Dong-A University   ); Kwon Young-Soo    (Dept. of Electrical Engineering, Dong-A University  );
  • 초록

    Organic monolayers were fabricated onto Au(l l l) substrate by self-assembly method using dipyridinium. Also, organic single molecule in the organic monolayers was selected to measure the current-voltage (I-V) curves by using the ultrahigh vacuum scanning tunneling microscopy (UHV-STM). The organic molecule used in the experiment was dipyridinium dithioacetate, which contains thiol functional group and can be self-assembled easily onto Au(l l l) substrate. The concentration of dipyridinium dithioacetate for self-assembly procedure was I [mM/L]. To confirm the formation of self-assembled mono layers (SAMs), the differences of thickness of the self-assembled organic monolayers were observed by using an ellipsometer, and the morphology and I-V curves of the SAMs were investigated by using UHV-STM. The applied voltages were from -2 [V] to +2 [V], temperature was 300 [K]. The vacuum for measuring current of the organic single molecule was 6 $\times$ 10 $^{-8}$ [Torr]. As a result, properties of the negative differential resistance (NDR) in constant voltage were found.


  • 주제어

    negative differential resistance .   self-assembled monolayers .   UHV-STM.  

  • 참고문헌 (8)

    1. J. Chen, M. A. Reed, A. M. Rawlett, J. M. Tour, 'Large On-Off Ratios and Negative Differential Resistance in a Molecular Electronic Device', Science, vol. 286, pp. 1550-1552, Nov. 1999 
    2. S. M. Sze, Physics of Semiconductor Devices, John wiley & Sons, Inc., 1981, p. 279-292 
    3. Seung-Un Kim, Hoon-Kyu Shin, Young-Soo Kwon, 'Study on the negative differential resistance properties of self-assembled organic thin films by using STM', Colloids and Surfaces A, vol. 257-258, pp. 211-214, 2005 
    4. J. Chen, W. Wang, and M. A. Reed, A. M. Rawlett, D. W. Price, and J. M. Tour, 'Room-temperature negative differential resistance in nanoscale molecular junctions', App. Phys. Lett., vol. 77, no. 8, pp. 1224- 1226, Aug. 2000 
    5. Nam-Suk Lee, Hoon-Kyu Shin, Young-Soo Kwon, 'Study on the Morphology Observation and Electrical Properties of Dipyridinium Organic Monolayer Using STM', Trans. KIEE., vol. 54C, no. 2, pp. 51-54, 2005 
    6. Fu-Ren F. Fan, Jiping Yang, Shawn M. Dirk, David W. Price, Dimitry Kosynkin, James M. Tour, and Allen J. Bard. 'Determination of the Molecular Electrical Properties of Self-Assembled Monolayers of Compounds of Interest in Molecular Electronics', J. Am. Chem. Soc., vol. 123, no. 10, pp. 2454-2455, 2001 
    7. Jorge M. Seminario, Angelica G. Zacarias, and James M. Tour, 'Theoretical Study of a Molecular Resonant Tunneling Diode', J. Am. Chem. Soc., vol. 122, no. 13, pp. 3015-3020, 2000 
    8. Lintao Cai, Yuxing Yao, Jiping Yang, David W. Price, Jr., and James M. Tour, 'Chemical and Potential- Assisted Assembly of Thiolacetyl-Terminated Oligo (phenylene ethynylene)s on Gold Surfaces', Chem. Mater., vol. 14, no. 7, pp. 2905-2909, 2002 
  • 이 논문을 인용한 문헌 (1)

    1. Lee Nam-Suk ; Kwon Young-Soo 2006. "Study on Electrical Characteristic of Self-assembled Nitro Molecule Onto Au(111) Substrate by Using STM/STS" 전기학회논문지. The transactions of the Korean Institute of Electrical Engineers. C/ C, 전기물성·응용부문, 55(1): 16~19     

 저자의 다른 논문

  • Lee Nam-Suk (1)

    1. 2006 "Determination of the NDR and Electron Transport Properties of Self-Assembled Nitro-Benzene Monolayers Using UHV-STM" Journal of electrical engineering & technology 1 (3): 366~370    
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