Study of Langmuir and Langmuir-Blodgett films of ferroelectric liquid crystals by Fourier transform infrared and polarization modulated infrared reflection absorption spectroscopies
Study of Langmuir and Langmuir-Blodgett films of ferroelectric liquid crystals by Fourier transform infrared and polarization modulated infrared reflection absorption spectroscopies
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用傅里叶变换红外和偏振调制红外反射吸收光谱研究铁电液晶的 Langmuir 和 Langmuir-Blodgett 薄膜
作者：
S. Payan;B. Desbat;C. Destrade;H. Nguyen
通过表面压力测量和偏振调制红外反射吸收光谱（PM-IRRAS）表征了通过朗缪尔-布洛杰特（L-B）技术在水亚相上获得的单层和多层铁电液晶（FLC）。水表面上的特定表面选择规则和PM-IRRAS方法的高灵敏度允许对Langmuir膜的微观分子组织进行估计。此外，五层FLC被成功地转移到CaF 2和金固体基板上，并通过常规的傅里叶变换红外光谱和PM-IRRAS方法进行了研究。最后讨论了温度对L-B薄膜结构排列的影响。
Monolayer and multilayers of ferroelectric liquid crystals (FLC) obtained by the Langmuir−Blodgett (L-B) technique on the water subphase were characterized by surface pressure measurements and by polarization modulated infrared reflection absorption spectroscopy (PM-IRRAS). The specific surface selection rules on the water surface and the high sensitivity of the PM-IRRAS method allow the estimation of the microscopic molecular organization of Langmuir films. Moreover, five layers of FLC were successfully transferred onto CaF2 and gold solid substrates and were studied by conventional Fourier transform infrared spectroscopy and by the PM-IRRAS method. Finally, the influence of the temperature on the structural arrangement of L-B films has been discussed.