Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Molecular Orientation and the Surface Mophology of polyimide precursor ultrathin film

폴리이미드 전구체 초박막의 분자배향과 표면상태에 관한 연구

  • Jeong, Soon-Wook (School of Advanced Materials & Systems Engineering, Kumoh National Institute of Technology)
  • 정순욱 (금오공과대학교 신소재시스템공학부)
  • Published : 2005.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Langmuir-Blodgett(LB) technique can speak the best candidate of the future molecular electronic devices. But, precursor as molecular ultrathin film devices require the bulk property that are influenced by the molecular orientation. So, this device is one of current interest in molecular electronic device development of new materials. In this study, quantitative evaluation of molecular orientation in LB films of polyamic acid alkylamine salt was performed analysis experiment comparing the absorption or transmission intensity of the FT-IR spectrometer and reflection or absorption spectra with UV-visible absorption spectra. It could find that the polar angle(${\theta}$) of the dipole moment appears in about $68^{\circ}$ and the tilting angle of the alkyl chain is about $11.5^{\circ}$.

Keywords

References

  1. E. Itoh, M. Iwamoto, Interfacial lectrostatic phenomena and capacitance-voltage characteristics of ultrathin polyimide Langmuir-Blodgett films, J. Appl. Phys., 85. 7239 (1999)
  2. S.W. Jeong, Fabrication of Organic Ultra Thin Films by Langmuir-Blodgett Technique and Molecular Electronics, J. Kor. Oil. Chem Soc., 7(1), 1 (1990)
  3. 福田構成,石井淑夫,加藤貞二, LB膜と エレクトロニクス, シ-エムシ-, 1(1986)
  4. E. Itoh, Y. Niwa, M. Iwamoto, Temperature dependence of electrostatic phenomena at the electrode-polyimide LB film interface before and after photoirradiation, Thin Solid Films 284-285, 545 (1996)
  5. S.W. Jeong, K.H. Hwang, and B.C. Sohn, Fabrication of Ultra Thin Films with (3-Docosyl Benzimidazolium)-TCNQ(1:1) Complex by Langmuir-Blodgett(LB) Technique(1), J. Kor. Oil. Chem Sac., 11(2), 89 (1994)
  6. S.W. Jeong, Y.K Lee and B.C. Sohn, Stability to the Spreading Solvent of (N-Docosyl Quinolinium)-TCNQ(1 :2) Complex by Langmuir-Blodgett Technique, J. Kor. Oil. Chem Soc., 11(2), 93 (1994)
  7. A. Ulman, 'An Introduction to Ultrathin Organic Films', p. 101, Academic Press, Boston (1991)
  8. S.W. Jeong, Deposition Condition and Confirmation of Organic Charge Transfer Complex Langmuir-Blodgett Film, J. or. Oil. Chem Soc., 14(1), 89 (1997)
  9. S.W. Jeong and H.S. Lim, A study on the preparation of aromatic polyimide Langmuir-Blodgett films, Synthetic Metals, 123, 183 (2001)
  10. H.L. Tyan, Y.C. Liu and K.H. Wei, Enhancement of imidization of poly(amic acid) through forming poly(amic acid)/ organoclay nanocomposites, Polymer, 40, 4877 (1999)
  11. T.Miwa, Y. Okabe and M. Ishida, Effects of precursor structure and imidization process on the thermal expansion coefficient of polyimide(BPDA/PDA), Polymer, 38(9), 4945 (1997)
  12. S.W. Jeong and H.S. Lim, Deposition Condition and Confirmation of Polyamic Acid Alkylamine Salt(PAAS) LangmuirBlodgett Film, MRS-K Fall Meeting, 191 (1999)
  13. M.P. Srinivasan and Kenneth K.S. Lau, Molecular orientation in mixed LB films containing photochromic molecules, Thin Solid Films, 307, 266 (1997)
  14. M. Yoneyama, M. Sugi, M. Saito, K. Ikegami, S. Kuroda, S. Iijima, Photoelectric Properties of Copper Phthalocyanine Langmuir-Blodgett Film, jpn. J. Appl. Phys., 25, 961 (1986)
  15. M.Suztiki, LANGMUIR-BLODGET法に よる ポリ イミド 超薄膜の作製に關する研究, Ph. D. Dissertation, Tokyo Institute of Technology, Tokyo, Japan (1986)
  16. S. Yokohama, M.A. Kakimoto, Y. Imai, T. Yamada and K. Kajikawa, Surface structure and orientation of polyamic acid alkylamine salt Langmuir-Blodgett films having an azobenzene pendant unit, Thin Solid Films, 273, 254 (1996)