Textural and electro-optical study of a room temperature nematic liquid crystal 4̍-pentyl-4-biphenylcarbonitrile doped with metal oxide nanowires in planar and in-plane switching cell configurations

Published on May 14, 2020in Liquid Crystals2.908
· DOI :10.1080/02678292.2020.1755467
Amit Kumar Sharma9
Estimated H-index: 9
(NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar),
Pankaj Kumar5
Estimated H-index: 5
(Chitkara University)
+ 0 AuthorsPraveen Malik17
Estimated H-index: 17
(NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)
Sources
Abstract
This work shows the doping effect of metal oxide nanowires (alumina nanowires) on the textural and electro-optical characteristics of nematic liquid crystal (5CB) in planar and in-plane switching (...
📖 Papers frequently viewed together
9 Citations
4 Citations
8 Citations
References63
Newest
#1Amit Kumar Sharma (NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)H-Index: 9
#2Praveen Malik (NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)H-Index: 17
Last. Pankaj Kumar (University Institute of Engineering and Technology, Panjab University)H-Index: 30
view all 3 authors...
AbstractIn present work, electro-optical and dielectric characteristics of ZnO nanoparticles (NPs) doped nematic liquid crystal mixture are studied in In-Plane Switching (IPS) mode. Effect of dopin...
4 CitationsSource
#1Amit Kumar Sharma (NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)H-Index: 9
#2Praveen Malik (NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)H-Index: 17
Last. Pankaj Kumar (University Institute of Engineering and Technology, Panjab University)H-Index: 30
view all 4 authors...
Reported herein is the effect of dispersion of a fixed amount of 0.5% (wt/wt) ZnO nanoparticles (NPs) in a nematic (E7) liquid crystal (LC) mixture. Dispersion of ZnO NPs results in a significant improvement in electro-optical and dielectric parameters of the nematic mixture. Comparative analysis of undoped and NP-dispersed samples shows a reduced threshold voltage with better transmittance without compromising dielectric permittivity characteristics. In addition, an increase in the contrast rat...
9 CitationsSource
#1Amit Kumar SharmaH-Index: 9
#2Pankaj KumarH-Index: 9
Last. Praveen MalikH-Index: 17
view all 3 authors...
In this work, phase transition and dielectric behavior of nematic liquid crystal (NLC), E7 and zinc oxide (ZnO) nanoparticles (NPs) doped nematic liquid crystals are investigated. Effect of nano-particles dispersion is analyzed and compared with the dielectric behavior of E7 and E7-ZnO. Frequency dependent dielectric permittivity at various temperatures in nematic phase for E7 and E7-ZnO sample is also studied.In this work, phase transition and dielectric behavior of nematic liquid crystal (NLC)...
3 CitationsSource
#1F. V. Podgornov (Technische Universität Darmstadt)H-Index: 11
#2M. Gavrilyak (SUSU: South Ural State University)H-Index: 1
Last. Wolfgang Haase (Technische Universität Darmstadt)H-Index: 63
view all 5 authors...
ABSTRACTIt is well established that incorporation of nanoparticles (NPs) in the structure of ferroelectric liquid crystals (FLCs) leads to a decrease in their electrooptic response time. Several approaches have been suggested to explain this effect (decrease in rotational viscosity of FLCs, ions enhanced localised electric field, dipole–dipole interaction among NPs and FLC molecules, FLC ordering). In this article, we will report the role of the voltage divider formed by the structural elements ...
23 CitationsSource
#1Pradeep Kumar (IITD: Indian Institute of Technology Delhi)H-Index: 4
#2Somen DebnathH-Index: 6
Last. Aloka SinhaH-Index: 15
view all 4 authors...
: We report the effect of dispersion of barium titanate (BaTiO3) nanoparticles (BNPs) in a four ring bent core nematic (BCN) liquid crystal. Polarizing optical microscopy reveals the presence of a single nematic phase in pure and doped states. Polar switching has been observed in the bent core system and the value of spontaneous polarization (P s) increases with increase in doping concentration of BNPs in BCN. Dielectric study shows a lower frequency mode, which can be ascribed to the formation ...
9 CitationsSource
#1Aradhana Roy (LU: University of Lucknow)H-Index: 5
#2Govind Pathak (LU: University of Lucknow)H-Index: 11
Last. Rajiv Manohar (LU: University of Lucknow)H-Index: 21
view all 6 authors...
The present study investigates the influence of InP/ZnS core/shell QDs on various parameters of Nematic LC sample 1832A, based on 4-(4-alkyl-cyclohexyl)benzene isothiocyanates and 4-(4-alkyl-cyclohexyl)biphenyl isothiocyanates. Observations recorded consist of distinguished functioning of birefringence phenomenon along with characteristic response time measurement. Further study of rotational viscosity and splay elastic constant portrays stupendous behavior strengthening the appositeness of the ...
12 CitationsSource
#1Divya Jayoti (NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)H-Index: 5
#2Praveen Malik (NITJ: Dr. B. R. Ambedkar National Institute of Technology Jalandhar)H-Index: 17
Last. S. Krishna PrasadH-Index: 32
view all 3 authors...
Abstract The influence of spherical zinc oxide nanoparticles (ZnO-NPs) incorporated in low concentrations (0.45, 0.7, 1.0 wt/wt%) into a polymer confined ferroelectric liquid crystal (FLC) has been investigated. Varying the concentration of ZnO-NPs is found to have a profound impact on the morphology of the polymer dispersed ferroelectric liquid crystal (PDFLC) composites. With increasing ZnO-NP content, the real and imaginary parts of the permittivity and the dielectric strength of a relevant r...
13 CitationsSource
#1Rajratan Basu (USNA: United States Naval Academy)H-Index: 19
#2Samuel Shalov (USNA: United States Naval Academy)H-Index: 2
: In a conventional liquid crystal (LC) cell, polyimide layers are used to align the LC homogeneously in the cell, and transmissive indium tin oxide (ITO) electrodes are used to apply the electric field to reorient the LC along the field. It is experimentally presented here that monolayer graphene films on the two glass substrates can function concurrently as the LC aligning layers and the transparent electrodes to fabricate an LC cell, without using the conventional polyimide and ITO substrates...
24 CitationsSource
#1Khushboo (Thapar University)H-Index: 6
#2Puneet Sharma (Thapar University)H-Index: 15
Last. K. K. Raina (DIT University)H-Index: 26
view all 4 authors...
ABSTRACTIn this work, the effect of Iron nanoparticles (Fe NPs) dispersion in 4′-(Hexyloxy)-4-biphenylcarbonitrile (6OCB) nematic liquid crystal properties has been studied. Inclusion of Fe NPs (0.25 wt. %) in 6OCB liquid crystal (LC) on textures, isotropic–nematic transition temperature (TI–N), electro-optical and dielectric properties have been investigated in planar aligned cell. The threshold voltage (Vth) and TI–N decrease after dispersion of Fe NPs. Dielectric spectroscopy in nematic phase...
15 CitationsSource
#1A. Maleki (Sharif University of Technology)H-Index: 1
#1Ali Maleki (Sharif University of Technology)H-Index: 57
Last. F. Saboohi (Sharif University of Technology)H-Index: 1
view all 3 authors...
ABSTRACTThe influence of Fe3O4 nanoparticles (NPs) on dielectric properties of planar and homeotropic oriented nematic liquid crystals (NLCs) were studied during the temperature interval of 298–322 °K. It was found that the dielectric permittivity was considerably increased by adding NPs mass percentages. The structural characterization of the synthesized NPs with the scale 14–18 nm has been analyzed by the X-ray diffraction and field-emission scanning electron microscopy results. The obtained d...
14 CitationsSource
Cited By1
Newest
A simple synthesis of carbon quantum dots (CQDs) from green sources has attracted increasing attention nowadays. Here we report the synthesis of water-soluble fluorescent carbon quantum dots from mandarin juice by hydrothermal method. When excited at 364 nm, CQDs give maximum fluorescence at 462 nm. As verified from Transmission Electron Microscopy, obtained CQDs were very small, with an average diameter of 2.37 ± 0.42 nm. These very small-sized nanoparticles were dispersed to nematic liquid cry...
4 CitationsSource