International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Special Issue: 09 | Sep -2017
p-ISSN: 2395-0072
www.irjet.net
One Day International Seminar on Materials Science & Technology (ISMST 2017) 4th August 2017 Organized by
Department of Physics, Mother Teresa Women’s University, Kodaikanal, Tamilnadu, India
Synthesis, Growth and Optical Studies of L-Valine Potassium Nitrate Single Crystal P. Eniya1, S.Tamilarasan2 and J. Kalyana Sundar3 1,2,3Material
Science laboratory, Department of Physics, Periyar University, Salem-636 011, Tamil Nadu, India E-Mail: *jksundar50@gmail.com & eniyayasan007@gmail.com ---------------------------------------------------------------------***--------------------------------------------------------------------2. Experimental Procedures Abstract - The Nonlinear optical single crystal of L-Valine Potassium Nitrate (VKN) crystal was grown by slow evaporation technique at room temperature. The powder Xray diffraction confirms the presence of metal nitrate and the formation of new crystal. Further, it is supported by the presence of COO- group vibrations of carboxylic acid and NO2 vibrations which identified from FT-IR spectra. The UV-Visible spectra show split transmittance curve, which is useful for band pass filter applications. The dielectric studies prove that the sample has low dielectric constant and dielectric loss at higher frequencies. The SHG efficiency of the VKN crystal is found to be 0.9 times that of pure KDP.
Key Words: Semi organic Crystal, L – Valine, Metal nitrate, Band pass filter NLO 1. INTRODUCTION The design of optoelectronics and photonic devices relies heavily in the development of nonlinear optical materials with higher efficiency. The materials possessing large second order nonlinear susceptibility with favorable in thermal and mechanical stability are intensively used in many device applications (1). The development of semi organic materials, where the organic ligand is ionically bonded with inorganic host refined the search of new materials with high optical nonlinearities which is an important area due to their optical applications such as optical communication, optical computing, optical information processing, optical disk data storage, laser fusion reaction, laser remote sensing, color display, medical diagnostics, etc. (2). Amino acid of L-valine has been exploited for the formation of salts with inorganic acids. As a result, good NLO material such as L-valine hydrobromide, L-valinium succinate, and L-valine hydrochloride, N-Glycyl-L-Valine, l-valine cadmium chloride, L-valine nickel (II) Chloride were already reported (3-5). In the present paper the report consist of synthesis of L-valine Potassium nitrate crystal by slow evaporation method and the characterization by powder XRD, FTIR, optical transmission, dielectric analysis, and powder SHG test. © 2017, IRJET
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The compound L-Valine Potassium nitrate (VKN) was synthesized by dissolving equimolar quantities of L-Valine and Potassium nitrate (VKN) in double distilled water. The resulting solution was stirred well for two hours and a white colored precipitate was obtained. The filtered precipitate and then dried well at room temperature. A saturated solution of L-Valine Potassium nitrate precipitate was prepared in water solvent (10ml) and the resulting solution was stirred well about two hours. Then the solution was filtered using Whatmann filter paper to eliminate if any suspended impurities present in the solution. The clear filtered solution was taken in beaker and placed at room temperature. After 25 days, a good optical and colorless single crystal of L-Valine Potassium nitrate single crystal of (6mm X 3mm X 1mm) were obtained by slow evaporation solution growth technique. The grown L-Valine Potassium nitrate (VKN) single crystal is shown in Fig.1.
Fig. 1. Photograph of L-Valine Potassium Nitrate Crystal
3. RESULT AND DISCUSSION 3.1. Powder X-ray Diffraction The powder XRD pattern was recorded using Rigaku XRD with CuKα radiation (wavelength 1.5406 Ǻ) and it is shown in Fig. 2.
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