DOI QR코드

DOI QR Code

Characteristics of Ultrathin Film Prepared through Nano-Sized Langmuir Blodgett Monolayer of Functionalized Polyimide

  • Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University) ;
  • Lee, Soo (Dept. of Chemical Engineering, Changwon National University)
  • Published : 2009.06.30

Abstract

Techniques measuring Maxwell displacement current (MDC) and LB films surface measuring technique have been applied to the study of monolayers of polyamic acid containing azobenzene. MDCs was generated from monolayers on the water surface by monolayer compression and expansion. It was generated when the area per molecule was about $103{\AA}^2\;and\;78{\AA}^2$ just before the initial rise of the surface pressure during the 1st and 2nd mixed monolayer compressions cycle, respectively. It was the maximum of MDCs appeared at the molecular area just before the initial rise of surface pressure in compression cycles, and we have found that the increase of aggregations causes the noticeable increase of the surface roughness.

Keywords

References

  1. K. H. Park and M. Iwamoto, Maxwell Displacement Current across Langmuir Phospholipid Monolayers mixed with Azobenzene by Photoisomerization, J. Colloid and Interface Sci., 193(1), 71 (1997) https://doi.org/10.1006/jcis.1997.5035
  2. X. B. Xu, Y. Majima, and M. Iwamoto, Molecular switching in phospholipidazobenzene mixed monolayers by photoisomerization, Thin Solid Films, 331(1), 239 (1998) https://doi.org/10.1016/S0040-6090(98)00925-0
  3. K. H. Park and T. G. Park, A Study on the Photoisomerization of Functional Polyimide Monolayers contammg Azobenzene. J. Kor. Ind. Eng., 11(1), 87 (2000)
  4. K. H. Park and T. G. Park, A Study on the Photoisomerization of Fatty Acid and Polyamic Acid Mixture, J. Kor. Inst. Elec. Mater. Eng., 15(8), 695 (2002) https://doi.org/10.4313/JKEM.2002.15.8.695
  5. T. C. Son, N. S. Kim, and K H. Park, The Electrochemical Characterization of Mixture LB Films of Fatty Acid and Phospholipids, J. Kor.. Oil Chern. Soc., 19(3), 75 (2003)
  6. S. H. Choi, T. C. Son, J. Y. Song, and K. H. Park, Electrochemical Properties of Organic Ultra Thin Films of Fatty Acid and Phospholipid Mixture, J. Kor. Oil Chern. Soc., 23(2), 137 (2006)
  7. D. W. Kang and K. H. Park, Photoisomerization LB Monolayer Films Mixed with Fatty Acid and Phospholipid at Difference Mixture Ratio. J. Kor. Oil CJzern. Soc., 17(3), 183 (2000)
  8. S. Yokoyama, M. Kakimoto, and Y. Imai, Preparation and in -plane anisotropic photobleaching properties of polyimide Langmuir-Blodgett films having a photoresponsive p-nitroazobenzene pendant group, Langmuir, 9, 1086 (1993) https://doi.org/10.1021/la00028a034
  9. P. Moraille and A. Badia, Nanoscale Stripe Patterns in Phospholipid Bilayers Formed by the Langmuir-Blodgett Technique, Langmuir, 19(19), 8041 (2003) https://doi.org/10.1021/la034727n
  10. K. H. Park and J. Y Song, A Study on the Oxidation-Reduction Reaction of Organic Thin Films, J. Kor. Inst. Elec. Mater. Eng. , 19(8), 724 (2006) https://doi.org/10.4313/JKEM.2006.19.8.724
  11. M. Iwamoto, Y. Majima, and H. Naruse, Generation of Maxwell displacement current from spread monolayers containing azobenzene, J. Appl., Phys., 72, 1631 (1992) https://doi.org/10.1063/1.351680
  12. K. S. Lee and M. Iwamoto, Maxwell Displacement Current across Phospholipid Monolayers at the AirlWater Interface, J. Colloid Inteiface Sci.., 177(2), 414 (1996) https://doi.org/10.1006/jcis.1996.0053
  13. M. Iwamoto and T. Kubota, Maxwell displacement current across phospholipid monolayers due to phase transition, J. Chern. Phys., 104(2), 736 (1996) https://doi.org/10.1063/1.470798
  14. Y. Majima, Y. Kanai, and M. Iwamoto, Maxwell displacement-current generation due to trans-cis photoisomerization in monolayer Langmuir-Blodgett film, J. Appl. Phys., 72(4), 1637 (1992)