Single crystals of γ-glycine were grown by slow evaporation technique. The crystalline system was confirmed by single crystal X-ray diffraction analysis. The optical absorption study has shown that the grown crystal possesses lower cut-off wavelength. Solubility and metastable zone width were estimated for different temperatures. The induction period of title compound was determined by varying the temperature and concentration. Nucleation parameters such as Gibbs volume free energy change (ΔGv), interfacial tension (γ), critical free energy change of the nucleus (ΔG*), nucleation rate (J), number of molecules in the critical nucleus (i*) have been calculated for the aqueous solution grown γ-glycine single crystals. The second harmonic generation (SHG) of γ-glycine was confirmed by Q-switched Nd:YAG laser technique. © 2013 Elsevier B.V.

Rajan Babu D

Department of Physics

School of Advanced Sciences

Vellore Campus

Ezhil Vizhi R

Yogambal C

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Physica B: Condensed Matter

Organic bulk single crystal of cyclohexylaminium hydrogen phthalate hemihydrate (CYHPH) was grown by slow cooling method using methanol as a solvent. The grown crystal belongs to orthorhombic system with Pbcn space group and it has various functional groups such as NH3 +, phthalate and a water molecule. The cut off wavelength of CYHPH was found at 307 nm. Thermal analysis affirmed that the CYHPH compound was stable up to 146 °C and completely decomposed at 263 °C. The activation energy at 100 Hz, 1 and 10 KHz was found to be 0.31, 0.141 and 0.142 eV respectively. The grown CYHPH crystal exhibits third order nonlinear optical behavior. © 2017, Springer Science+Business Media New York.

Fulltext

Journal of Materials Science: Materials in Electronics

Growth and characterization of cyclohexylaminium hydrogen phthalate hemihydrate nonlinear optical single crystals

Single crystals of γ-glycine in the presence of cesium chloride were grown from aqueous solution by low temperature solution growth technique. The phase purity and crystal structure of the grown crystals were confirmed by Powder X-ray diffraction analysis. The presence of functional groups were confirmed by FT-IR spectrum. Thermal analysis of the grown crystal was determined by thermogravimetric and differential thermal analysis (TG/DTA), which results the thermal stability of the grown crystal. The optical absorption and lower cut-off values were ascertained by recorded UV-Visible spectrum of γ-glycine crystals. The existence of second harmonic generation efficiency of frequency doubling was found to be 6 times greater than that of KDP. © 2014 WILEY-VCH Verlag GmbH &amp; Co. KGaA, Weinheim.

Crystal Research and Technology

Effect of cesium chloride addition on crystal growth, structural, thermal and optical properties of γ-glycine single crystal

Single crystals of Potassium pentaborate were grown by the slow evaporation method at room temperature. Single crystal XRD provided evidence that the crystallized material was Potassium pentaborate and the lattice parameter was also ascertained. Solubility of the material was determined gravimetrically. The stability of the material was studied by observing the metastable zone width using the polythermal method. The induction period was determined at different temperatures by varying the supersaturation from 1.1 to 1.5. Various nucleation parameters such as interfacial energy, Gibbs volume free energy change, critical volume free energy change, radius of critical nuclei and nucleation rate were estimated. Optical studies were carried out in the region of 200-800 nm, it was inferred that the material possessed a wide transparency in visible region with the cutoff wavelength 243 nm. NLO property of the material was confirmed by Q-switched Nd-YAG technique. © 2013 Elsevier B.V.

Nucleation kinetics, growth, and optical properties of Potassium pentaborate single crystals

Gamma glycine was synthesized and the single crystals were grown by the slow evaporation method in the presence of lithium nitrate. Structure and crystalline nature of the grown γ-glycine crystal was confirmed by X-ray diffraction technique. It was found to crystallize in the trigonal system with space group P31. The chemical composition was determined by NMR. Fourier transform infrared studies revealed the functional groups present in the grown crystal and UVvisNIR spectra revealed the transmission properties of the crystal specimen. Surface morphology of the grown crystal was studied by scanning electron microscopy (SEM) and elemental composition was confirmed by energy-dispersive spectrometry (EDS). The second-order nonlinear optical property of the material was investigated by Kurtz powder technique and the relative second harmonic efficiency of γ-glycine was estimated to be higher than that of KDP. The dielectric measurement was carried out as a function of frequencies at room temperature and the results were discussed. The samples have shown piezoelectric behavior with a fairly good piezoelectric charge coefficient (d33) of 7.37 pC/N. Photoluminescence studies showed emission peak around 350 nm. Thermo gravimetric and differential thermal analyses were employed to understand the thermal and physio-chemical stability of the synthesized compound. © 2011 Elsevier B.V. All rights reserved.

Journal	Data powered by TypesetPhysica B: Condensed Matter
Publisher	Data powered by TypesetElsevier BV
ISSN	0921-4526
Open Access	0