聚丁二炔Langmuir-Blodgett薄膜的光声谱研究(Ⅰ)结构表征与光声吸收系数  

The Investigation of Photoacoustic Spectroscopy for Polydiacetylene Langmuir Blodgett Films (Ⅰ)Structure Characterization and Photoacoustic Absorption Coefficient Spectra

作　　者：江月松[1,2] 

机构地区：[1]北京理工大学光电工程系 [2]东南大学毫米波国家重点实验室

出　　处：《光谱学与光谱分析》1999年第2期154-157,共4页Spectroscopy and Spectral Analysis

摘　　要：本文在用Ｘ－射线小角衍射对聚合与转载先后次序不同的ＰＤＡＬＢ膜进行结构表征的基础上，不同厚度ＰＤＡＬＢ膜的光声斩波频率效应说明，随着ＰＤＡＬＢ膜厚度增加，ＬＢ膜的热学性质逐渐明显。此外，还探讨了如何从ＰＤＡＬＢ膜的光声谱求得光声吸收系数问题，本文的研究结果表明，光声谱技术是研究ＬＢ膜热学特性的有效手段。The polydiacetylene(PAD)Langmuir Blodgett(LB)films,which have potential applications in industry,were studied by using X ray low angle diffraction and photoacoustic chopping frequency effects and photoacoustic absorption coefficients obtained.The X ray low angle diffraction of PDA LB films prepared by different sequence of polymerization/transferring shows that the two kinds of PDA LB films have different array structures.The chopping frequency effects of PDA LB films of different thickness are consistent with Roscenwaig Gersho theory and show that the thermal property of PDA LB films gradually becomes obvious with the increase of thickness.A new method of acquiring photoacoustic absorption coefficient from photoacoustic spectroscopy was also developed.The achievement of this paper shows that the PAS technique is a valid means for studying LB films.

关 键 词：聚丁二炔 光声谱 薄膜 LB膜 

分 类 号：O649.5[理学—物理化学] O632.17[理学—化学]