Use of photoacoustic effect for the detection of phase transitions in liquid crystal mixtures

Nibu A. George, C. P.G. Vallabhan, V. P.N. Nampoori, A. K. George, P. Radhakrishnan

نتاج البحث: المساهمة في مجلةمراجعة النظراء

13 اقتباسات (Scopus)

ملخص

We report on a laser induced photoacoustic study of the nematic-to-isotropic transition in certain commercial nematic liquid crystal mixtures, namely BL001, BL002, BL032 and BL035. A simple analysis of the experimental data using the Rosencwaig-Gersho theory shows that the heat capacities of all these compounds exhibit a sharp peak as the temperature of the sample is varied across the transition region. Also, substantial differences in the photoacoustic signal amplitudes in nematic and isotropic phases have been noticed for all the mixtures. The increased light scattering property of the nematic phase may be the reason for the enhanced photoacoustic signal amplitude in this phase.

اللغة الأصليةEnglish
الصفحات (من إلى)3228-3232
عدد الصفحات5
دوريةJournal of Physics D: Applied Physics
مستوى الصوت33
رقم الإصدار24
المعرِّفات الرقمية للأشياء
حالة النشرPublished - ديسمبر 21 2000

ASJC Scopus subject areas

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  • ???subjectarea.asjc.3100.3104???
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بصمة

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