کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10564457 | 970757 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman mapping of Polymer Dispersed Liquid Crystal
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The electro-optical properties of polymer dispersed liquid crystals (PDLC) materials make them interesting for display applications, especially as light modulators through a controllable scattering effect. Their electro-optical performances are strongly correlated with the distribution of the liquid crystal director inside the droplets. We showed that the Raman spectrometry mapping allows to evidence the director distribution of liquid crystal molecules in a confined geometry. In this study, we have focused our attention to the case of nematic liquid crystal (5CB) droplets dispersed in a polymer matrix (PMMA). Considering the characteristic CN polarized triple bond we have observed a change of the Raman spectrometry images by varying the orientation of the droplet axis versus to the pump beam polarization. To explain these changes, we purpose to use the classical bipolar droplet model. This ideal representation of the liquid crystal organisation inside the droplet enabled us to easily determine the general form of the Raman spectrometry maps.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 39, Issue 1, 15 September 2005, Pages 31-36
Journal: Vibrational Spectroscopy - Volume 39, Issue 1, 15 September 2005, Pages 31-36
نویسندگان
J.-F. Blach, A. Daoudi, J.-M. Buisine, D. Bormann,