Influence of silver and gold nano particles on luminance properties of n-hexyloxy-cynobiphenyl liquid crystal through image analysis
https://doi.org/10.17586/2220-8054-2021-12-4-453-461
Abstract
In this work, gold and silver nanoparticles are separately dispersed in n-hexyloxy-cyanobiphenyl (6O.CB) liquid crystal in the ratio 1:100. The optical textures of pure and nano-dispersed compounds are recorded by using polarizing optical microscope. Differential scanning calorimeter (DSC) is used to compute enthalpy and transition temperature values. Due to the dispersion of nanoparticles, the clearing temperature of the compounds are slightly reduced but there is no significant change in the nematic phase exhibited by pure 6O.CB. Further characterization is done by various spectroscopic techniques like scanning electron microscopy (SEM) and X-ray diffraction (XRD). The optical textures have been analyzed using MATLAB software for the evaluation of display parameters viz., Luminance, Luminance coefficient, Luminance uniformity and Contrast ratio.
About the Authors
D. R. Roopa
Department of Physics, SJB Institute of Technology
India
India
Bengaluru, Karnataka
C. M. Subhan
Department of Physics, SV Degree and PG College
India
India
Anantapur, Andhra Pradesh.
K. Fakruddin
Department of Physics, Ghousia College of Engineering
India
India
Ramanagaram, Karnataka.
P. Pardhasaradhi
Department of ECE, Koneru Lakshmaiah Education Foundation
India
India
Vaddeswaram, Guntur.
B. T.P. Madhav
Department of ECE, Koneru Lakshmaiah Education Foundation
India
India
Vaddeswaram, Guntur.
G. Srilekha
Department of ECE, Koneru Lakshmaiah Education Foundation
India
India
Vaddeswaram, Guntur
References
1. Prasad M.M., Mohan M.M.L.N., Chalapathi P.V., Ashok Kumar A.V.N., Potukuchi D.M. Influence of spacer and flexible chain on polymorphismin complementary hydrogen bonded liquid crystaldimers, SA: nOBAs. J Mol Liq., 2015, 207, P. 294–308.
2. Sangameswari G., Prabu N.P.S., Mohan M. A detailed study of hydrogen bonded ferroelectric mesogens formed between alkyl and alkyloxy benzoic acids with carbanyl glutamic acid. Liq Cryst., 2018, 45, P. 431–449.
3. Ahmed H.A., Hagar M., Alaasar M., Naoum M. Wide nematicphases induced by hydrogen-bonding. Liq Cryst., 2019, 46(4), P. 550–559.
4. Martinez-Felipe A., Cook A.G., Wallage M.J., Imrie C.T. Hydrogen bonding and liquid crystallinity of low molar mass and polymeric mesogens containing benzoic acids: a variable temperature Fourier transform infrared spectroscopic study. Phase Transitions, 2014, 87(12), P. 1191– 1210.
5. Walker R., Pociecha D., Abberley J.P., Martinez-Felipe A., Paterson D.A., Forsyth E., Lawrence G.B., Henderson P.A., Storey J.M.D., Gorecka E., Imrie C.T. Spontaneous chirality through mixing achiral components: a twist-bend nematic phase driven by hydrogen-bonding between unlike components. Chem Comm., 2018, 54, P. 3383–3386.
6. Goodby J.W., Pikin S.A., Robert Blinc,Clark N.A., Lagerwall S.T., Osipov M.A., Tadayoshi Sakurai, Yoshino K., Zeks B. Ferro electric liquid crystal-principles properties and applications. Gorden and Breech Science, Philadelphia, 1991.
7. Percec V. Bioinspired supramolecular liquid crystals. Philos Trans R Soc A., 2006, 364, P. 2709–2719.
8. Yang D.K., Wu S.T. Liquid crystal materials in fundamentals of liquid crystal devices. JohnWiley and Sons, Ltd., Chichester(UK), 2006.
9. Sreehari Sastry S., Nageswara Rao C., Vishwam. T., Mallika K., Ha sie Tiong. Confirmational Studies of intermolecular hydrogen bonding through induced crystal G phase innBA:7HB. Liq Cryst., 2013, 40(7), P. 932–941.
10. Martinez-Felipe A., Imrie C.T. The role of hydrogen bonding in the phase behaviour of supra molecular liquid crystal dimers. J. Mol Struct., 2015, 1100, P. 429–437.
11. Paterson D.A., Martinez-Felipe A., Jansze S.M., Antonius T.M.M., Storey J.M.D., Imrie C.T. New insights into the liquid crystal behaviour of hydrogen-bonded mixtures provided by temperature-dependent FTIR spectroscopy. Liq Cryst., 2015, 42, P. 928–939.
12. Rohehrig H. Displays for medical imaging, Chapter 2: Physical characterization and image quality, dissertation. Arizona, The University of Arizona, 2018.
13. Castellano J.A. Handbook of display technology. Academic Press Inc, San Diego(US), 1992.
14. Vimal T., Dharmendra P.S., Agrahari K., Srivatsava A., Manohar R. Analysis ofoptical properties and mechanism of photoluminescence enhancement of a quantum dot – ferroelectric liquid crystal composite. Photonics Lett Poland, 2016, 8, P. 23–25.
15. Pathaka G., Agraharia K., Roya A., Srivatsavaa A., Strzezyszb O., Garbatb K., Manohara R. Dispersion of fluorescent dye in the nematic liquid crystal: enhanced photoluminescence and high birefringence. Opto-electron rev., 2018, 26, P. 317–324.
16. Chen J., Cranton W., Fihn M. Handbook of Visual Display Technology. Springer International Publishing, Switzerland, 2016.
17. Widdel H., Post D.L. Color in electronic displays. Plenum press, New York, 1992.
18. Sweet Khisa. Characterization and calibration of a LCD display based on a limited set of color samples (master Thesis). Saint-Etienne,´ University of Jean Monnet, 2010.
19. Gonzalez R.C., Woods R.E., Eddins S.L. Digital image processing using MATLAB. Knoxville(TN), Gatesmark Publishing, 2009.
20. toplightco.com (internet). London (UK), lighting blog (cited 2015 June 18). Available from: https://toplightco.com/blog/whats-the-differencebetweenluminance-and-illuminance.html
21. cs.stackexchange.com (internet). New York (US), Stackover flow (cited 2018 May 31). Available from: https://cs.stackexchange.com/questions/92569/what-is-the-difference-between-luma-and luminance.html
22. displayalliance.com (internet). Amesbury (Essex), Mass Integrated, Inc (cited 2011 July 8). Available from: http://www.displayalliance.com/glossary/luminanceuniformity.html
23. Casol M., Fiorentin P., Scroccaro A.16-th IMEKO TC4Symposium- Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements. Florence, Italy, 2008, Sept 22–24.
24. Ghanadzade A., Beevers M.S. Effect of surface and molecular structure on the dielectric behaviour in thick layers of cyanobiphenyl liquid crystals. Journal of Molecular Liquids, 2002, 100(1), P. 47–57.
Review
For citations:
Roopa D.R., Subhan C.M., Fakruddin K., Pardhasaradhi P., Madhav B.T., Srilekha G. Influence of silver and gold nano particles on luminance properties of n-hexyloxy-cynobiphenyl liquid crystal through image analysis. Nanosystems: Physics, Chemistry, Mathematics. 2021;12(4):453-461. https://doi.org/10.17586/2220-8054-2021-12-4-453-461
Views:
3
Email this article 