InP/ZnS quantum-dot-dispersed nematic liquid crystal illustrating characteristic birefringence and enhanced electro-optical parameters
- 188 Downloads
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 composites for low-charge consumable devices. The addition of 0.2 ml of core/shell QDs producing more than two times faster response and enhanced birefringence at low-temperature range can be employed in development of thermostable photonic devices. In addition, dielectric properties comprising of relative permittivity and conductivity have been reported supporting the outcome of the investigation in applicative LC-based technologies.
Authors are grateful to the Department of Science and Technology, (DST) and UPCST for Indo-Polish Project. Author A. Roy is thankful to UGC, New Delhi, India for the grant of BSR fellowship. Author R. Manohar is grateful to UGC, New Delhi, India for MID CAREER AWARD 2017.
- 1.P.J. Collings, Liquid Crystals: Nature’s Delicate Phase of Matter (Princeton University Press, Princeton, 1990)Google Scholar
- 8.R. Dhar, A.S. Pandey, S. Kumar, R. Dabrowski, Optimization of the electrical parameters of nematic and discotic liquid crystalline materials due to the dispersion of nano particles, nano tubes and quantum dots for display and photovoltaic applications. in Nanotechnology: Advanced Materials, CNTs, Particles, Films and Composites, vol 1 (2013), pp. 542–545Google Scholar
- 16.S. Pandey, T. Vimal, D.P. Singh, S.K. Gupta, P. Tripathi, C. Phadnis, S. Mahamuni, A. Srivastava, R. Manohar, Cd1-xZnxS/ZnS core/shell quantum dot ferroelectric liquid crystal composite system: analysis of faster optical response and lower operating voltage. Liq. Cryst. 41, 1811–1820 (2014)CrossRefGoogle Scholar
- 23.R. Mazur, W. Piecek, Z. Raszewski, P. Morawiak, K. Garbat, O. Chojnowska, M.Mrukiewicz,M. Olifierczuk, J. Kedzierski, R. Dabrowski, D. Weglowska, Nematic liquid crystal mixtures for 3D active glasses application. Liq. Cryst. 44, 1–10 (2016)Google Scholar
- 24.G. Pathak, S. Pandey, R. Katiyar, A. Srivastava, R. Dabrowski, K. Garbat, R. Manohar, Analysis of photoluminescence, UV absorbance, optical band gap and threshold voltage of TiO2 nanoparticles dispersed in high birefringence nematic liquid crystal towards its application in display and photovoltaic devices. J. Lumin. 192, 33–39 (2017)CrossRefGoogle Scholar
- 27.H. Zhou, E.P. Choate, H. Wang, Optical Fredericks transition in a Nematic liquid crystal layer, in Liquid Crystalline Polymers as Tools for the Formation of Nanohybrids (2015), pp. 1–50Google Scholar