Hindustan Institute of Technology

Padur, India

Hindustan Institute of Technology

Padur, India
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Koteeswari P.,Hindustan Institute of Technology | Mani P.,Hindustan Institute of Technology | Suresh S.,Loyola College
Materials Physics and Mechanics | Year: 2012

Single crystals of Bisglycine Hydrobromide (BGHB) have been grown by slow evaporation technique. The unit cell dimensions and morphology of the grown crystals are confirmed by single crystal X-ray diffraction. The grown crystals were also subjected to microhardness. The microhardness studies indicate that the Vickers hardness number of the crystal decrease with the increase in applied load. Dielectric constant and dielectric loss measurements were carried out at different temperatures and frequencies. The photoconductivity studies confirm that the title compound has negative photoconductivity nature. © 2012, Institute of Problems of Mechanical Engineering.

Suresh S.,Loyola College | Mand P.,Hindustan Institute of Technology | Anand K.,Manakula Vinayagar Institute of Technology
Journal of Chemistry | Year: 2013

Nonlinear optics (NLO) materials have a significant impact on laser technology, optical communication, optical storage technology, and electrooptic modulation. Nonlinear optical single crystal of L-phenylalanine benzoic acid has been grown by slow evaporation. The XRD analysis confirms that the crystal belongs to the monoclinic system with noncentrosymmetric space group P2 Microhardness investigations are conducted on the grown crystals. The dielectric response of the sample is studied as a function of different frequencies and different temperatures. The photoconducting studies confirm that the title compound has negative photoconducting nature. © 2013 S. Suresh et al.

Koteeswari P.,Hindustan Institute of Technology | Koteeswari P.,Madha Engineering College | Suresh S.,Loyola College | Mani P.,Hindustan Institute of Technology
International Journal of ChemTech Research | Year: 2013

Nonlinear optical single crystals of L-Valinium picrate were conveniently grown by slow evaporation method. The good quality single crystal has been harvested in a period of 25 days. The crystal structure and space group were confirmed by single crystal X-ray diffraction analysis. The optical transmission studies has been carried out and found that the tendency of transmission observed from the specimen with respect to wavelength of light is practically more suitable for opto-electronic applications. FTIR confirms the presence of all functional groups in the grown crystal. Thermal stability and decomposition process were studied by means of thermogravimetric analysis and differential thermal analysis. The Vicker's microhardness values were measured for the grown crystal. The relative second harmonic generation efficiency of L-Valinium picrate crystal has been tested by Kurtz-Perry powder technique.

PubMed | Hindustan Institute of Technology
Type: Journal Article | Journal: Journal of physics. Condensed matter : an Institute of Physics journal | Year: 2011

The Percus-Yevick integral equation theory has been solved to study the equilibrium and structural properties of quadrupolar Gay-Berne fluids. The method used involves an expansion of angle-dependent functions appearing in the integral equations in terms of spherical harmonics and the harmonic coefficients are obtained by an iterative algorithm. All the terms of harmonic coefficients which involve l indices up to less than or equal to 6 have been considered. Molecules with length-to-breadth ratios 3.0 and 4.0 have been considered and results are reported for different densities, temperatures, and quadrupole moments. The values of pair correlation functions have been compared with the available computer simulation results.

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