Open AccessControl over Vertical Orientation of Liquid Crystal using Spin Coated Silica Nanoparticles Layer on Conductive Substrates
Author(s) -
Ankit Rai Dogra,
Vandna Sharma,
Partha Khanra,
Pankaj Kumar
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2070/1/012039
Subject(s) - materials science , indium tin oxide , polyimide , polarizer , nanoparticle , layer (electronics) , liquid crystal , spin coating , coating , deposition (geology) , electrical conductor , chemical engineering , nanotechnology , indium , optoelectronics , composite material , optics , paleontology , physics , birefringence , engineering , sediment , biology
Recently, various techniques such as self-assembly, chemical vapour deposition and capillary method etc. are used for nanoparticles (NPs) deposition on the conductive substrates for the vertical alignment (VA) of liquid crystals (LCs). The initial VA of LCs in display devices have the potential impact on industry and various electro-optic devices applications. In the present work, vertical orientation of LCs was controlled on silica (SiO 2 ) nanoparticles (NPs) layer deposited on indium tin oxide (ITO) glass substrates using spin coating method. The VA LC cell was also prepared for conventional polyimide coated ITO glass substrates. The morphological images showed the initial darker textures under crossed polarizers and conoscopic image with dark cross confirmed the VA of LC on SiO 2 NPs coated substrates analogous to the conventional VA LC cell. Further, electro-optic results revealed the reduction in applied voltage and better contrast ratio for SiO 2 NPs coated VA LC cell compared with polyimide coated VA LC cell.