Photoluminescence and electrical conductivity measurement of liquid crystal doped with ZnO nanoparticles

We report the effect of dispersion of zinc oxide (ZnO) nanoparticles (NPs) on the conductivity, birefringence and fluorescence properties of commercially available room temperature nematic liquid crystal (LC) with the variation of dopant concentration. Significant changes have been observed in trans...

Full description

Saved in:
Bibliographic Details
Published in:Liquid crystals 2019-04, Vol.46 (5), p.666-673
Main Authors: Pushpavathi, N., Sandhya, K. L., Pratibha, R.
Format: Article
Language:English
Subjects:
Birefringence
Blue shift
Conductivity
electrical conductivity
Electrical resistivity
Enthalpy
Fluorescence
LC nanocomposite
Liquid crystal
Liquid crystals
Nanoparticles
Nematic crystals
Order parameters
Photoluminescence
Piezoelectricity
Threshold voltage
Zinc
Zinc oxide
Zinc oxides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the effect of dispersion of zinc oxide (ZnO) nanoparticles (NPs) on the conductivity, birefringence and fluorescence properties of commercially available room temperature nematic liquid crystal (LC) with the variation of dopant concentration. Significant changes have been observed in transition enthalpy, DC conductivity, photoluminescence and birefringence values of the LC material by the addition of ZnO NPs. While the inclusion of NPs enhances the electrical conductivity of the composite system, it results in a reduction in the birefringence value, which can be attributed to a decrease in the order parameter of the system due to the perturbed geometry of the LC. This also results in the increase in threshold voltage value, which has been speculated as due to the piezoelectric nature of the ZnO NPs. The analysis of the fluorescence spectrum indicates that ZnO NPs enhance the intensity in the LC phase along with a small blue shift.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678292.2018.1517421