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 Stability of Ultra-Thin Film Mixed with Stearic Acid and Phospholipid

스테아르산과 인지질 혼합물의 농도변화에 대한 유기초박막의 안정성에 관한 연구

  • Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University)
  • 박근호 (창원대학교 화공시스템공학과)
  • Received : 2015.11.13
  • Accepted : 2015.12.30
  • Published : 2015.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we investigated the stability with respect to the Langmuir-Blodgett(LB) monolayer films of stearic acid and phospholipid(L-${\alpha}$-dimyristoylphosphatidyl choline, DMPC) mixture. LB films of stearic acid and DMPC monolayer were deposited by the LB method on the indium tin oxide(ITO) glass. The electrochemical properties measured by cyclic voltammetry with three-electrode system in $0.05N\;NaClO_4$ solution, -0.3 V initial, 1650 mV switching potential and -1350 mV final potential. As a result, monolayer LB films of stearic acid and phospholipid mixture was appeared on irreversible process caused by the oxidation current from the cyclic voltammogram. Diffusion coefficient (D) of stearic acid and DMPC mixture(molar ratio 1:1, 1:2, 1:3) was calculated $1.4{\times}10^{-3}$, $1.7{\times}10^{-3}$ and $1.6{\times}10^{-3}(cm^2/s)$ in $0.05N\;NaClO_4$ solution, respectively.

스테아르산과 인지질혼합물의 농도변화에 띠르는 유기초박막에 대한 안정성을 조사하였다. 스테아르산과 인지질 혼합물 유기초박막은 ITO glass에 LB법을 사용하여 제막하였다. 전기화학적 특성은 $NaClO_4$ 용액에서 3 전극 시스템으로 순환전압전류법을 사용하여 초기 1650 mV에서 최종 퍼텐셜 -1350 mV 까지 측정하였다. 그 결과 스테아르산과 인지질의 혼합물 유기초막은 순환전압전류도표로부터 산화전류로 인한 비가역공정으로 나타났다. 스테아르산과 인지질혼합물 LB막(몰비 1:1, 1:2, 1:3)에서 확산계수(D)는 $0.01N\;NaClO_4$에서 각각 $1.4{\times}10^{-3}$, $1.7{\times}10^{-3}$ 및 $1.6{\times}10^{-3}(cm^2/s)$로 산출되었다.

Keywords

References

  1. J. M. Ouyang, Z. M. Zhang, C. X. Huang, X. Q. Yao, H, Y, Liu, and X. M. Hu, Properties of mixed monolayer and LB films of chiral amino acid porphyrin, Colloids and Surfaces, 175, 99 (2000). https://doi.org/10.1016/S0927-7757(00)00525-2
  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). https://doi.org/10.1021/bm049195j
  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). https://doi.org/10.1529/biophysj.105.064030
  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). https://doi.org/10.1016/j.bbamem.2014.02.012
  5. Rakesh K. Pandey, K. A. Suresh, and V. Lakshminarayanan, Electron transfer studies on cholesterol LB films assembled on thiophenol and 2-naphthalenethiol self-assembled monolayers, J. Coll. Inter. Sci. 315, 528 (2007). https://doi.org/10.1016/j.jcis.2007.07.044
  6. R. Li, Q. B. Chen, D. Z. Zhang, H. L. Liu, and Y. Hu, Mixed monolayers of Gemini surfactants and stearic acid at the air/water interface, J. Coll. Inter. Sci., 327, 162 (2008). https://doi.org/10.1016/j.jcis.2008.07.038
  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). https://doi.org/10.1006/jcis.1997.5035
  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, A Study on the Electrochemical Properties of Langmuir-Blodgett Nano-film Mixed with Polyimide and Phospholipid, J. Kor. Oil Chem. Soc., 29(3), 421 (2012).
  10. 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).
  11. J. M. Ko and H. C. Park, Principles and Applications of Cyclic Voltammetry, Poly. Sci. Tech., 10 519 (1999).
  12. D. S. Park, Study for Electrode Reaction Characteristics by Cyclic Voltammetry, Poly. Sci. Tech., 14, 356 (2003).
  13. K. H. Park, and J. Y. Song, "A Study on the Oxidation-reduction Reaction of Organic Thin Films, J. Kor. Electrical and Electronic Mat. Eng. 19(8), 724 (2006).
  14. A. J Jung and K. H. Park, A Study on the Electrochemical Characteristics of Langmuir-Blodgett Nano-Films of Phospholipid Compound, J. Kor. Oil Chem. Soc., 29(2), 311 (2012).
  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).
  16. 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). https://doi.org/10.1016/j.electacta.2006.03.062

Cited by

  1. 미리스트산과 스테아르산 혼합 LB막의 안정성에 관한 연구 vol.34, pp.2, 2015, https://doi.org/10.12925/jkocs.2017.34.2.376