Browse > Article
http://dx.doi.org/10.12925/jkocs.2015.32.3.522

A Study on the Maxwell Displacement Current in Monolayer of L-α-Dilauryl phosphatidylcholine on the Water Surface  

Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.32, no.3, 2015 , pp. 522-527 More about this Journal
Abstract
We applied a displacement current measurement technique for the study of L-${\alpha}$-dilauryl phosphatidylcholine (DLPC) monolayer. Displacement current was generated at the DLPC monolayer on the water surface, while induced by compression and expansion of the monolayer. Generation of Maxwell displacement current (MDC) was observed when surface areas per DLPC molecule were approximately $200{\AA}^2$ and $40{\AA}^2$. We investigated MDC for monolayer compression cycles, and found that MDC reached the maximum at the molecular area, which was measured right before surface pressure began to increase during compression cycles. The monolayer surface morphology of Langmuir-Blodgett (LB) films was characterized using atomic force microscope (AFM). As a result, we measured the result from the microscopic properties shown in the AFM images of LB films that molecules in the monolayer were in good orientations and the thickness of the monolayer ranged from 5 to 10 nm.
Keywords
DLPC; surface pressure; AFM; LB film; MDC;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
1 A. U. Ulmann, An Introduction to Ultrathin Organic Films From Langmuir-Blodgett to Self- Assembly, Academic press: San Diego, CA, 1991.
2 David J. Lestage, Min Yu, and Marek W. Urban, Stimuli-Responsive Surfactant/Phospholipid Stabilized Colloidal Dispersions and Their Film Formation, Biomacromolecules, 6, 1561 (2005).   DOI
3 S. Garcia-Manyes, G. Oncins, and F. Sanz, Effect of Ion-Binding and Chemical Phospholipid Structure on the Nanomechanics of Lipid Bilayers Studied by Force Spectroscopy, Biophysical Journal, 89, 1812 (2005).   DOI
4 A. Mangiarotti, B. Caruso, and N. Wilke, Phase coexistence in films composed of DLPC and DPPC: A comparison between different model membrane systems, Biochimica et Biophysica Acta, 1838, 1823 (2014).   DOI
5 D. W. Kang and K. H. Park, Photoisomerization LB Monolayer Films Mixed with Fatty Acid and Phospholipid at Difference Mixture Ratio. J. Kor. Oil Chem. Soc., 17(3), 183 (2000).
6 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).   DOI
7 K. H. Park and M. Iwamoto, Maxwell Displacement Current across Langmuir Phospholipid Monolayers mixed with Azobenzene by Photoisomerization. J. Collo. Inter. Sci., 193, 71 (1997).   DOI
8 Y. H. Chung and W. S. Lee, The Capacitance Properties of DLPC Liquid Membrance Fabricated by LB Method, J. KIEEME, 11(8), 628 (1998).
9 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).
10 S. Garcia-Manyes, G. Oncins, and F. Sanz, Effect of pH and ionic strength on phospholipid nanomechanics and on deposition process onto hydrophilic surfaces measured by AFM, Electrochimica Acta, 51, 5029 (2006).   DOI
11 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 Chem. Soc., 23(2), 137 (2006).
12 K. H. Park, A Study on the Langmuir-Blodgett Films of Polyamic Acid Monolayer Containing p-Nitroazobenzene, J. Kor. Oil Chem. Soc., 28(2), 213 (2011).
13 Y. Li, C. Zhu, J. Zhu, H. Liang, D. Chen, H. Zhao, and B. Liu, Nanomechanics of phospholipid LB film studied layer by layer with AFM, Chemistry Central J. 8, 71 (2014).   DOI
14 C. H. Min, T. C. Son, and K. H. Park, Electrochemical Properties of Ultrathin Film Prepared Functional Polyimide by Langmuir-Blodgett Method, J. Kor.. Oil Chem. Soc., 26(4), 400 (2009).
15 K. H. Park and S. Lee, Characteristics of Ultrathin Film Prepared through Nano-Sized Langmuir Blodgett Monolayer of Functionalized Polyimide, J. Kor.. Oil Chem. Soc., 26(2), 224 (2009).