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아조벤젠이 기능화된 덴드리머 유기단분자막의 광학적 거동
신훈규,손정호,김병상,권영수 한국전기전자재료학회 2002 전기전자재료학회논문지 Vol.15 No.7
Many isolated featureless domains were explicitly observed even at the air-water interface. We measured the surface pressure shift originating from the photo-isomerization of azobenzene units on the periphery of dendrimers. The maximum surface pressure was gradual1y increased and saturated by cyclic compression and decompression. By irradiation of 365 [nm] light, the surface pressure was increased, which was originated by the photo-isomerization process of the azobenzene group on the periphery from trans to cia form. The increase of the dipole moment ($\mu$), which may increase the interaction among Azo dendrimer molecules, made an important role on surface pressure shift. From the absorbance spectrum by UV irradiation and heat treatment, we can see that the absorbance in the UV region decreases with the increase of the UV irradiation time, but the peak at 350 m, characteristic of dendrimers in the LB monolayers, was not shifted until four irradiation cycles. This suggests that optical behavior and morphological change are affected by the functional group and the symmetric chain.
공중합체 LB막의 누적상태 평가 및 유기 가스 반응 특성
신훈규,최용성,이범종,정귀상,장정수,권영수 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
In this paper, the monolayers of the polymers which were polyion-complexed with PAA at the air-water interface can be transferred onto solid substrates such as porous fluorocarbon membranes filter and quartz crystal microbalance. The properties of the monolayers and the LB films have been discussed by π-A isothemis, FT-IR, DSC, deposition ratio, QCM, SEM and UV absorbance. In addition, it was attempted to investigate response characteristics of polymer LB films to the organic gas by the use of QCM.
신훈규,최용성,장정수,권영수 한국전기전자재료학회 1996 電氣電子材料學會誌 Vol.9 No.2
The use of preformed copolymers and their cross-linking have been attempted in order to improve the intrinsic fragility of monolayers and Langmuir-Blodgett (LB) films and to make their technological applications. It has shown that an imidization followed a polyion-complexation can stabilize the LB films against heat and solvents. And, when the polymer structure was properly designed, concurrent removal of the alkyl tails together with imide formation could be accomplished. In this paper, the monolayers of the polymers which were polyion-complexed with PAA at the air-water interface can be transferred onto solid substrates such as porous fluorocarbon membranes filter and quartz crystal microbalance. The properties of the monolayers and the LB films will be discussed by .pi.-A isotherms, FT-IR, DSC, deposition ratio, QCM, and SEM. In addition, it was attempted to investigate the response characteristics of polymer LB films to the organic gases by the use of QCM.