کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10638142 | 995352 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study of the wide ferroelectric phase in mixtures of chiral and non-chiral tilted smectic C-type liquid crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A new liquid crystal of a siloxane dimer with an achiral swallow-tail, C11Si2C11, D, was synthesized and mixed with a chiral material as a chiral dopant, 4â²-[11-(1,1,2,2,3,3,3-heptamethyltrisiloxanyl)undecyloxy]biphenyl-4-carboxylate, C11Si3, C, to prepare binary mixtures for this study. All mixtures possess the ferroelectric chiral smectic C phase over a broad temperature range. For respect compound C11Si3, the temperature range of the SmC* phase was only 72.6 °C, and was increased upon the addition of dimer C11Si2C11. The electro-optical properties of the SmC* phase, such as tilt angle, dielectric permittivity and switching behavior were also measured. It appeared that the mixtures had a similar viscosity, but the switching time was decreased due to the larger Ps, which was caused by an increased proportion of C11Si3. Therefore, the mixtures revealed a similar tilt angle at around 37.5° at temperatures within their respective mesophase temperature ranges. As a consequence, the correlation between the electro-optical properties and mixture proportion was determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 125, Issue 3, 15 February 2011, Pages 749-756
Journal: Materials Chemistry and Physics - Volume 125, Issue 3, 15 February 2011, Pages 749-756
نویسندگان
Chien-Tung Liao, Jiunn-Yih Lee, Chiu-Chun Lai,