Wyniki wyszukiwania - BazTech

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Optical Fibers in the Design and Fabrication of Smart Garments – a Review

King Raji Rafiu, Qin Luo, Ning Li, Haijin Liu

Fibres & Textiles in Eastern Europe

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2022

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Vol. 30, no. 1 (151)

31--42

EN

Several publications and even commercial products showcasing the application of optical fibers for textile goods abound in literature. Optical fibers can be employed as sensors by making use of physical principles to sense strain, temperature, and other quantities by tailoring the fiber such that the quantity to be measured alters the intensity, phase, polarisation, and wavelength of light within the fiber. However, a paper directed at the development of textile based applications or smart garments using optical fibers is lacking. This review seeks to serve as apt reference material for the development of optical fiber based textile sensors or smart garments with a focus on the application of plastic optical fibers (POFs). Highlighted are the salient material properties of POFs and their importance in delivering satisfactory sensing results. Special treatment has also been given to their proposed feasibility for embedment within weft knitted structures.

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Synthesis, growth and characterization of semiorganic nonlinear optical single crystal bis(thiourea) barium nitrate (BTBN) for frequency conversion

Anbarasi A., Kumar S.M. Ravi, Raj M. Packiya, Sundar G.J. Shanmuga, Ganapathy M., Kubendiran T., Varalakshmi S.

Materials Science Poland

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2019

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Vol. 37, No. 3

381--388

EN

A novel semiorganic nonlinear optical (NLO) crystal, bis(thiourea) barium nitrate (BTBN) was synthesized and grown by slow evaporation method. Structure of the new crystalline compound was confirmed by single crystal X-ray diffraction analysis and it showed that BTBN belongs to orthorhombic crystal system. The crystalline nature of the BTBN was confirmed by powder X-ray diffraction study. Important functional groups of BTBN were identified by FT-IR spectroscopic analysis. UV-Vis-NIR spectral study showed that the grown crystal is transparent in the entire visible region with low cut off wavelength of 304 nm. BTBN exhibits a SHG efficiency which is nearly 2.38 times higher than that of KDP. The BTBN crystal has high mechanical strength and belongs to soft category, which was confirmed by micorhardness study. The thermal stability of BTBN was determined from TGA and DTA thermal study which revealed that the BTBN crystal has thermal stability up to 243.1 °C. The surface properties and presence of elements was analyzed by SEM and EDAX study, respectively.

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Structural, optical, thermal, dielectric and mechanical studies of a new organic NLO material: L-isoleucinium p-toluenesulfonate monohydrate (LIPT)

Suresh M., Asath Bahadur S., Athimoolam S.

Materials Science Poland

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2019

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Vol. 37, No. 2

196--205

EN

In the present work, a new organic second order NLO material: L-isoleucinium p-toluenesulfonate monohydrate (LIPT) is synthesized and reported for the first time. The LIPT is crystallized in a non-centrosymmetric monoclinic space group P21. Structural and hydrogen bond nature of the compound is analyzed using single crystal X-ray diffraction studies. The crystal exhibits very good optical properties such as wide optical transparency in the region of 210 nm to 1100 nm and the ultraviolet wavelength emission (λ = 283 nm). The second harmonic generation efficiency is found to be 1.7 times the standard KDP. Good thermal, mechanical properties and low dielectric constant at high frequency range show that the material may be a potential candidate for optoelectronic applications.

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Investigation on growth, optical and thermal properties of stilbazolium derivative crystal: 4-N,N-dimethylamino-40-N0-methylstilbazolium 2,4-dimethylbenzenesulfonate

Md Zahid I., Kalaiyarasi S., Kumar M. K., Ganesh T., Jaisankar V., Kumar R. M.

Materials Science Poland

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2016

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Vol. 34, No. 4

811--818

EN

Metathesis ionic exchange reaction process was used to synthesize a novel nonlinear optical material: 4-N,N-dimethylamino-4′- N′-methylstilbazolium 2,4-dimethylbenzenesulfonate (DSDMS). The growth of DSDMS single crystals was carried out by adopting the solution growth technique. The crystal perfection and lattice parameters were elucidated from single XRD and powder XRD, respectively and its morphology was interpreted by WinXMorph program. FT-IR and Raman spectral analyses confirmed the existence of functional groups and their corresponding vibrational modes. UV-Vis spectral studies revealed the optical transmission region. Mechanical stability of the crystal was determined from Vickers microhardness number Hv, Meyer’s index n and elastic stiffness constant C11. Dielectric and thermal behavior of the grown crystal were elucidated by using impedance analyser and thermogravimetric analysis.

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Growth of Zn1−x Cd x O nanocrystalline thin films by sol-gel method and their characterization for optoelectronic applications

Munirah, Khan Z R, Khan M S, Aziz A

Materials Science Poland

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2014

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Vol. 32, No. 4

688--695

EN

This paper describes the growth of Cd doped ZnO thin films on a glass substrate via sol-gel spin coating technique. The effect of Cd doping on ZnO thin films was investigated using X-ray diffraction (XRD), UV-Vis spectroscopy, photoluminescence spectroscopy, I-V characteristics and field emission scanning electron microscopy (FESEM). X-ray diffraction patterns showed that the films have preferred orientation along (002) plane with hexagonal wurtzite structure. The average crystallite sizes decreased from 24 nm to 9 nm, upon increasing of Cd doping. The films transmittance was found to be very high (92 to 95 %) in the visible region of solar spectrum. The optical band gap of ZnO and Cd doped ZnO thin films was calculated using the transmittance spectra and was found to be in the range of 3.30 to 2.77 eV. On increasing Cd concentration in ZnO binary system, the absorption edge of the films showed the red shifting. Photoluminescence spectra of the films showed the characteristic band edge emission centred over 377 to 448 nm. Electrical characterization revealed that the films had semiconducting and light sensitive behaviour.