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Title: Liquid crystal mesophases beyond commensurate four-layer periodicity

Abstract

For more than one decade, SMC* d4, SmC* d3, and SmC* A were the only three confirmed commensurate SmC* variant phases with periodicities less than or equal four layers. In 2006, employing ellipsometry and resonant X-ray diffraction (RXRD), our research team first discovered a new liquid crystal mesophase having a six-layer periodicity in one ternary mixture which includes one sulfur-containing compound. From our ellipsometric results, this phase showed antiferroelectric-like optical response. This novel discovery inspired renewed interest to search for liquid crystal mesophases with commensurate periodicities greater than four layers. Soon after, another mesophase having a six-layer structure and showing a ferrielectric-like dielectric response, instead, was uncovered by RXRD measurements on a different binary mixture which has one bromine-containing compound. Meanwhile mesophases having a 5-, 8-, 12- or 15-layer periodicity were reported. However, numerous questions remain to be addressed associated with these unusual reported phases. Theoretical models giving rise to mesophases with periodicities greater than four layers have been developed; but, to date, none of them have provided satisfactory explanations of all the physical phenomena related to the mesophases exhibiting a six-layer structure. Moreover, the question “what is the source of long-range interactions between liquid-like smectic layers, which are responsiblemore » for establishing mesophases with long periodicities and mean-field behavior of the smectic-A–smectic-C transition?” remains unanswered for more than three decades.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1354418
Report Number(s):
BNL-112935-2016-JA
Journal ID: ISSN 2168-0396
DOE Contract Number:
SC00112704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Liquid Crystals Reviews; Journal Volume: 3; Journal Issue: 1
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; SmC* variant phases; SmC*d6; resonant X-ray diffraction; null-transmission ellipsometry

Citation Formats

Huang, C. C., Wang, Shun, Pan, LiDong, Liu, Z. Q., McCoy, B. K., Sasaki, Yuji, Ema, Kenji, Barois, P., and Pindak, Ron. Liquid crystal mesophases beyond commensurate four-layer periodicity. United States: N. p., 2015. Web. doi:10.1080/21680396.2015.1030462.
Huang, C. C., Wang, Shun, Pan, LiDong, Liu, Z. Q., McCoy, B. K., Sasaki, Yuji, Ema, Kenji, Barois, P., & Pindak, Ron. Liquid crystal mesophases beyond commensurate four-layer periodicity. United States. doi:10.1080/21680396.2015.1030462.
Huang, C. C., Wang, Shun, Pan, LiDong, Liu, Z. Q., McCoy, B. K., Sasaki, Yuji, Ema, Kenji, Barois, P., and Pindak, Ron. Fri . "Liquid crystal mesophases beyond commensurate four-layer periodicity". United States. doi:10.1080/21680396.2015.1030462.
@article{osti_1354418,
title = {Liquid crystal mesophases beyond commensurate four-layer periodicity},
author = {Huang, C. C. and Wang, Shun and Pan, LiDong and Liu, Z. Q. and McCoy, B. K. and Sasaki, Yuji and Ema, Kenji and Barois, P. and Pindak, Ron},
abstractNote = {For more than one decade, SMC*d4, SmC*d3, and SmC*A were the only three confirmed commensurate SmC* variant phases with periodicities less than or equal four layers. In 2006, employing ellipsometry and resonant X-ray diffraction (RXRD), our research team first discovered a new liquid crystal mesophase having a six-layer periodicity in one ternary mixture which includes one sulfur-containing compound. From our ellipsometric results, this phase showed antiferroelectric-like optical response. This novel discovery inspired renewed interest to search for liquid crystal mesophases with commensurate periodicities greater than four layers. Soon after, another mesophase having a six-layer structure and showing a ferrielectric-like dielectric response, instead, was uncovered by RXRD measurements on a different binary mixture which has one bromine-containing compound. Meanwhile mesophases having a 5-, 8-, 12- or 15-layer periodicity were reported. However, numerous questions remain to be addressed associated with these unusual reported phases. Theoretical models giving rise to mesophases with periodicities greater than four layers have been developed; but, to date, none of them have provided satisfactory explanations of all the physical phenomena related to the mesophases exhibiting a six-layer structure. Moreover, the question “what is the source of long-range interactions between liquid-like smectic layers, which are responsible for establishing mesophases with long periodicities and mean-field behavior of the smectic-A–smectic-C transition?” remains unanswered for more than three decades.},
doi = {10.1080/21680396.2015.1030462},
journal = {Liquid Crystals Reviews},
number = 1,
volume = 3,
place = {United States},
year = {Fri Jan 02 00:00:00 EST 2015},
month = {Fri Jan 02 00:00:00 EST 2015}
}