• R Gopalakrishnan

      Articles written in Bulletin of Materials Science

    • Growth and characterization of nonlinear optical single crystals: bis(cyclohexylammonium) terephthalate and cyclohexylammonium para-methoxy benzoate

      P Sathya M Anantharaja N Elavarasu R Gopalakrishnan

      More Details Abstract Fulltext PDF

      Bis(cyclohexylammonium) terephthalate (BCT) and cyclohexylammonium 4-methoxy benzoate (C4MB) single crystals were successfully grown by the slow evaporation solution growth technique. The harvested crystals were subjected to single-crystal X-ray diffraction, spectral, optical, thermal and mechanical studies in order to evaluate physiochemical properties. The Kurtz and Perry technique for second harmonic generation (SHG) study revealed that the powdered materials of BCT and C4MB exhibit SHG efficiency 0.2 times less and 1.3 times greater than that of standard reference material potassium dihydrogen phosphate. C4MB crystal exhibits high efficiency than BCT, because of methoxy group substituted in the para position of phenyl ring. With high SHG efficiency and thermal stability para substituted C4MB crystal will be a potential candidate for optical device fabrication.

    • Physicochemical, electrical and optical studies of methyl-3-(2-furylmethylidene) carbazate single crystal

      G Gomathi R Gopalakrishnan

      More Details Abstract Fulltext PDF

      The current study provides an insight into the physicochemical properties of an organic single crystal methyl-3-(2-furylmethylidene) carbazate, which was grown by employing the slow evaporation solution growth technique and its results were correlated for application point of view. The grown crystal was confirmed by performing single-crystal X-ray diffraction studies and Fourier transform infrared analysis. The optical, thermal, dielectric and mechanical properties of the grown single crystal were primarily investigated. Etching study was performed to analyse the defects and growth mechanism. Kurtz–Perry powder technique was used to study the second harmonic generation efficiency of the crystal and the crystal was found to exhibit Type-I phase matching.

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