Article
  • Studies on the Electrical Properties and Pattern Fabrication of Conjugated Self-Assembled Monolayer by Deep UV Light
  • Oh SY, Choi HS, Kim HJ, Park JK
  • 원자외선에 의한 공애액구조 자기조립 단분자막의 패턴 제작 및 전기적 특성
  • 오세용, 최형석, 김희정, 박제균
Abstract
In general, alkanethiolates having carboxylic acid in the tail group have been used as bioreceptors. In this study, we have immobilized a cytochrome c protein using conjugated aromaticthiolates in order to improve the electrical property and physical stability of alkanethilolates. The pattern formation of self-assembled aromaticthiolate monolayers was as follow. Aromatic thiolates bound on the gold surface by the adsorption of 4′-mercapto-biphenyl-4-carboxylic acid and 4-mercapto-[1,1′;4′,1″]terphenyl-4″-carboxylic acid were oxidized by the irradiation of deep UV light through a negative mask. The negative type pattern of the self-assembled monolayer (SAM) was obtained by developing with a deionized water. The pattern formation and electrical conductivity of aromaticthiolate SAMs was investigated by the measurements of STM and AFM. In addition, cytochrome c or ferrocene amide was immobilized onto the patterned substrate. We also studied on the effect of conjugated aromatic thiolates on the electrical activity of cytochrome c or ferrocene amide by cyclic voltammetry.

일반적으로 꼬리부분에 카복실산을 갖는 알칸티올레이트는 바이오 물질의 고성화 활성물질로 사용되고 있다. 본 연구에서는 알칸티올레이트의 전기적 성질과 물리적 안정성을 향상시키기 위해 공액구조를 갖는 방향족계 티올레이트를 사용하여 cytochrome c와 같은 단백질을 고정화시켰다. 방향족계 자기조립 단분자막의 패턴 형성은 다음과 같은 공정으로 행하였다. 4'-Mercapto-biphenyl-4-carboxylic acid와 4-mercapto-[1,1';4',1"]terphenyl-4"-carboxylic acid와 같은 방향족 티올레이트 분자를 금 기판에 흡착시킨 다음 네거티브 마스크를 가지고 원자외선 조사에 의해 산화반응을 시킨 후 deionized water로 현상하였다. 공액계 자기조립 단분자막의 패턴형성과 전기적 성질은 STM과 AFM 측정을 통해 조사하였다. 또한 cytochrome c 또는 ferrocene amide를 패턴이 형성된 금 기판에 고정화시킨 다음 cyclic voltammetry 측정을 통해 공액계 방향족 티올레이트의 전기적 활성을 검토하였다.

Keywords: aromatic thiolates; photopatterning; self-assembled monolayer; ferrocene amide; electrical conductivity and activity

References
  • 1. Huang S, Tour JM, J. Org. Chem., 64, 8898 (1999)
  •  
  • 2. Bumm LA, Arnold JJ, Cygan MT, Dunbar TD, Burgin TP, Jones L, Allara DL, Tour JM, Weiss PS, Science, 271(5256), 1705 (1996)
  •  
  • 3. Ellenbogen JC, Love JC, Proceed. IEEE, 88, 386 (2000)
  •  
  • 4. Creager S, Yu CJ, Bamdad C, O'Connor S, MacLean T, Lam E, Chong Y, Olsen GT, Luo JY, Gozin M, Kayyem JF, J. Am. Chem. Soc., 121(5), 1059 (1999)
  •  
  • 5. Price DW, Dirk SM, Maya F, Tour JM, Tetrahedron, 59, 2497 (2003)
  •  
  • 6. Cui XD, Primak A, Zarate X, Tomfohr J, Sankey OF, Moore AL, Moore TA, Gust D, Nagahara LA, Lindsay SM, J. Phys. Chem. B, 106(34), 8609 (2002)
  •  
  • 7. Tour JM, Accounts Chem. Res., 33, 791 (2000)
  •  
  • 8. Ulman AAn Introduction to Ultrathin Organic Films: From Langmuir Blodgett to Self-Assembly, San Diego, Academic, Press (1991)
  •  
  • 9. Ulman AThin Films : Self-Assembled Monolaers of Thiols, San Diego, Academic Press (1998)
  •  
  • 10. Ulman A, Chem. Rev., 96(4), 1533 (1996)
  •  
  • 11. Ulman A, Accounts Chem. Res., 34, 855 (2001)
  •  
  • 12. Oh SY, Park JK, Ko CB, Choi JW, Biosens. Bioelectron., 19, 103 (2003)
  •  
  • 13. Oh SY, Jie HS, Choi HS, Choi JW, Int. J. Nanosic., 1, 611 (2002)
  •  
  • 14. Oh SY, Choi HS, Jie HS, Park JK, Mater. Sci. Eng. C-Biomimetic Supramol. Syst., 24, 91 (2004)
  •  
  • 15. Brewer NJ, Rawsterne RE, Kothari S, Leggett GJ, J. Am. Chem. Soc., 123(17), 4089 (2001)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2005; 29(4): 331-337

    Published online Jul 25, 2005

  • Received on Jul 16, 2004
  • Accepted on Jun 7, 2005