폴리이미드 전구체 초박막의 분자배향과 표면상태에 관한 연구

A Study on the Molecular Orientation and the Surface Mophology of polyimide precursor ultrathin film

Langmuir-Blodgett(LB) technique can speak the best candidate of the future molecular electronic devices. But, precursor as molecular ultrathin film devices require the bulk property that are influenced by the molecular orientation. So, this device is one of current interest in molecular electronic device development of new materials. In this study, quantitative evaluation of molecular orientation in LB films of polyamic acid alkylamine salt was performed analysis experiment comparing the absorption or transmission intensity of the FT-IR spectrometer and reflection or absorption spectra with UV-visible absorption spectra. It could find that the polar angle({theta}) of the dipole moment appears in about 68^{circ} and the tilting angle of the alkyl chain is about 11.5^{circ}.