Surface memory effect in nematics with smectic C short-range order and hydrogen bonded molecules

Abstract

To cite this article: Minko P. Petrov & Lyubomir V. Tsonev (1996) Surface memory effect in nematics with smectic C shortrange order and hydrogen bonded molecules, Liquid Crystals, 21:4, 543-555, A surface memory effect (SME) is found in the dimerized nematic with short range smectic C order of 4-n-octyloxybenzoic acid (OOBA) in a cell whose walls have been covered with an obliquely evaporated SiO or I T 0 layer. The recording and erasure processes are discus'sed and erasure in the nematic phase is realized. A mechanism for the surface memorization is presented which takes into account the specific character of dimerized nematics preceding cooling into a smectic C phase.

Influence of hydrogen bonding on phase abundance in ferroelectric liquid crystals

“…In recent times, hydrogen-bonded liquid crystal complexes (HBFLCs) have been reported [1][2][3][4][5][6][7][8][9][10][11][12][13], and are synthesized from key functional materials selected on the basis of their molecular recognition and self-assembly capability. Owing to the demand for a wide variety of electrooptic materials with properties suitable for the display applications [14][15][16][17], research activity has grown in this area of materials involving supramolecular aspects of chemistry.…”

Influence of ZnO nanostructures in liquid crystal interfaces for bistable switching applications

“…Dipole-dipole interaction has long been taken into consideration in the design of liquid-crystalline molecules. Due to the demand for a wide variety of electro-optic materials with properties suitable for the display applications [25][26][27][28], research activity has grown in this area. Although the first reports of HBLC date back to the 1960s [29, 30], much research have taken place in the last two decades [31][32][33][34].…”

Study of thermal and electrical properties exhibited by two ferroelectric self assembly systems

“…The chemical molecular structure [10,[18][19][20][21][22] of HBFLC is co-related to the physical properties exhibited by it. The reported literature suggests the formation of HBFLC through carboxylic acids as well as from mixtures of unlike molecules capable of interacting through Hbonding [13][14][15][16][17][18][19][20][21]. Usually in all these HBLC the rigid core is made up of covalent and non covalent hydrogen bonding.…”

“…In recent times hydrogen bonded ferroelectric liquid crystals [HBFLC] reported [2][3][4][5][6][7][8][9][10][11][12][13][14] in literature are designed and synthesized from materials selected on the basis of their molecular reorganization and self assembly capability. The applicational aspects [15][16][17][18], and commercial viabilities made many research groups to work on these hydrogen bonded ferroelectric liquid crystals.…”