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http://dx.doi.org/10.12925/jkocs.2011.28.2.11

A Study on the Langmuir-Blodgett Films of Polyamic Acid Monolayer Containing p-Nitroazobenzene  

Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.28, no.2, 2011 , pp. 213-218 More about this Journal
Abstract
Displacement current measuring technique has been applied on the study of polyamic acid monolayer containing p-nitroazobenzene. The displacement current was generated from monolayer on the water surface by monolayer compression and expansion. Maxwell displacement current(MDC) was generated when the area per molecule was about $200{\AA}^2$ and $70{\AA}^2$. Maxwell displacement currents were investigated in connection with monolayer compression cycles. It was found that the maximum of MDC appeared at the molecular area just before the initial rise of surface pressure in compression cycles. The monolayer surface morphology of the LB film have been measured by Atomic Force Microscope(AFM). As a result, we confirmed that the microscopic properties of LB film by AFM showed the good orientation of monolayer molecules and the thickness of monolayer was 3.5-4.1nm.
Keywords
LB film; surface pressure; AFM; polyamic acid; MDC;
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Times Cited By KSCI : 5  (Citation Analysis)
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