Enhanced Electro-optical Properties of Low Viscous Nematic Liquid Crystal Doped with Mixed Phase Anatase/Rutile TiO2 Nanoparticles for Display Applications
Bhupendra Pratap Singh,
Samiksha Sikarwar,
Abhishek Kumar Misra,
Pankaj Kumar Tripathi,
Atul Kumar Srivastava,
Meeta Sah,
Rajiv Manohar,
Kamal Kumar Pandey
Issue:
Volume 6, Issue 3, September 2021
Pages:
25-35
Received:
13 June 2021
Accepted:
28 June 2021
Published:
6 July 2021
Abstract: Organic–inorganic composite based on liquid crystalline and TiO2 nanoparticles were obtained and investigated taking into account the crystallographic form of TiO2 i.e., anatase/rutile mixed phase. TiO2 is an important class of material having various dielectric and electro-optical properties. The existent research presents the electro-optical properties of nematic liquid crystal (NLC) E204 and TiO2 nanocomposites over an extensive range of frequencies. Various important display parameters such as response time, threshold voltage, pretilt angle and activation energy of pristine as well as TiO2 doped composites systems were measured and analyzed. In comparison with the pure, TiO2-doped composite systems has approximately 50% faster response time, owing to its remarkable decline in the relaxation time and activation energy of the LCs. The alteration in the optical intensity of the NLC composites as a function of the concentration of TiO2 nanoparticles (NPs) was also examined. It was established that the optical intensity in nano-nematic composites was decreasing with the concentration of TiO2 NPs. Also, it was observed that an escalation in the TiO2 NPs concentration in NLC composites indicates to an escalation in the birefringence. Probable mechanisms of the interactivity between NLC molecules and TiO2 NPs have been discussed. The current work shows that the TiO2 NPs doping has an encouraging application in the display devices, including other electro-optical as well as photonic applications.
Abstract: Organic–inorganic composite based on liquid crystalline and TiO2 nanoparticles were obtained and investigated taking into account the crystallographic form of TiO2 i.e., anatase/rutile mixed phase. TiO2 is an important class of material having various dielectric and electro-optical properties. The existent research presents the electro-optical prop...
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Mineral, Vitamin and Phytochemical Content of the Tigernut
Ani Abosede Oluwakemi,
Adelere Folake Irewunmi,
Sholotan Kazeem Joshua,
Nwaemeke David Iweunor
Issue:
Volume 6, Issue 3, September 2021
Pages:
36-40
Received:
21 May 2021
Accepted:
11 June 2021
Published:
11 August 2021
Abstract: Tigernut, or Cyperus esculentus L, is a tuber that grows and is frequently consumed in West Africa. Tigernut tuber is highly nutritive with high starch, glucose and proteins contents. It's high in minerals (including phosphorus and potassium), as well as vitamins C, D, and B1, which all assist to improve antioxidant activity. It can be consumed raw or dried and combined with roasted peanuts. The minerals, vitamins and phytochemical contents of tigernut were analyzed using accepted methods after the minerals value of the plant tubers were carefully pounded and grounded to paste. The presence of Tannin, Terpenes, Phenol, and Steroids were discovered as a result of phytochemical research in trace and in moderate concentration. Tigernut was found to contain 0.5305% phytochemicals. Phenol had a concentration of 0.236%, Saponin had a concentration of 0.167%, Glycosides had a concentration of 0.124%, Steroids had a concentration of 0.0028%, Tannin had a concentration of 0.0018%, and Terpenes had a concentration of 0.0017%. Also, the minerals assay revealed the presence of presence of calcium (Ca2+), potassium (K+), copper (Cu2+), iron (Fe2+), magnesium (Mg2+), manganese (Mn2+) and phosphorous (P+) in the tigernut tuber sample. Highest mineral element found was potassium (K+) and least was zinc with values of 4478.76 mg/kg and 0.589 mg/kg respectively. Tigernut tubers also contains high levels of vitamin C, B1, and D. Vitamin D was present in higher concentrations in (µg/100g) of (22.79 µg/100g) followed by vitamin C (5.76 mg/100g) and vitamin B1 (2.38 mg/100g). The result showed that tigernut tuber contain appreciable number of minerals, vitamins and low level of phytochemicals and could contribute to the recommended dietary allowance of the body.
Abstract: Tigernut, or Cyperus esculentus L, is a tuber that grows and is frequently consumed in West Africa. Tigernut tuber is highly nutritive with high starch, glucose and proteins contents. It's high in minerals (including phosphorus and potassium), as well as vitamins C, D, and B1, which all assist to improve antioxidant activity. It can be consumed raw...
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