A. Study on the PAAS(Polyamic Acid Alkylamine Salts) Langmuir Films and Langmuir-Blodgett Films using BAM(Brewster angle microscopy)

BAM(Brewster angle microscopy)을 이용한 PAAS(Polyamic Acid Alkylamine Salts)의 Langmuir막과 Langmuir-Blodgett막의 특성 연구

Brewster angle microscopy(BAM) makes it possible to observe the monolayer states on the water subphase and the phase transitions from a gaseous phase via a expanded phase to a condensed phase. Also BAM can be used to observe the films on the solid substrate such as Langmuir-Blodgett(LB) films. In this Paper Polyamic Acid Alkylamine Salts(PAAS) was used for forming L films and LB films and $\pi$-A isotherm showed pressure of each phase. We obtained BAM images as surface pressure increased. Images of LB films were compared with data from ellipsometry which was used to measure the film thickness. Images of both L films and LB films were analyzed with computer in the point of brightness.