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Dissertation/Thesis Abstract

Experimental Investigation of Temperature Dependency in Transmission Characteristics of Liquid Crystals by Spectroscopy
by Haffner, Ikem, M.S., University of Louisiana at Lafayette, 2017, 48; 10683206
Abstract (Summary)

Liquid crystals (LC) doped with Bismuth Ferrite Nanoparticles (BiFeO3) exhibit interesting transmission photonics behaviors. Doped LC has many applications in photonics when it is subjected to time-varying electric fields.

In this thesis, the temperature dependency of transmission through blue phase liquid crystal 4'-Pentyl-4-biphenylcarbonitrile at different wavelengths using a spectrophotometer was investigated. Also, the process steps of doping of 0.05g of 4'-Pentyl-4-biphenylcarbonitrile with 0.0024g of Bismuth Ferrite Nanoparticles (BiFeO3) was developed. A few drops of the 4'-Pentyl-4-biphenylcarbonitrile liquid crystal was placed between two microscope glass slides and a spectrophotometer was used to obtain the spectrum of the liquid crystal under 5 various temperatures with an increment of 10 degrees. The initial and final temperatures were 25 and 65 degrees Celsius, respectively.

The spectrum of the doped liquid crystal obtained shows that at a temperature of 45 degrees Celsius, a maximum transmittance of 95% occurred. Further increase in temperature led to a drop in the transmittance of the doped liquid crystal.

Indexing (document details)
Advisor: Madani, Mohammad, Daniel, Herbert
Commitee: Pratt, Micheal
School: University of Louisiana at Lafayette
Department: Electrical Engineering
School Location: United States -- Louisiana
Source: MAI 57/05M(E), Masters Abstracts International
Subjects: Electrical engineering
Keywords: 4′-pentyl-4-biphenylcarbonitrile, Bismuth ferrite nanoparticles, Doping, Liquid crystals
Publication Number: 10683206
ISBN: 978-0-355-85441-1
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