Growth of some organic NLO crystalsFrom solution and melt techniquesAnd their characterization

Abstract

The present investigation deals with the growth and newlinecharacterization studies of some organic nonlinear optical single crystals of Lalanine newlineLA Lalanine alaninium nitrate LAAN Lalaninium tartrate newlineLAT and 13 dinitrobenzene13DNB newlineThe first chapter discusses with the historical developments in newlinecrystal growth and various techniques of crystal growth The instrumentation newlineand design of the various crystal growth apparatus have been discussed in newlinedetail The scope of the thesis is given in brief The second chapter deals with newlinethe growth of LalanineCH3CHNH2COOH single crystals by slow cooling newlinemethod and their characterization Single crystals of Lalanine were grown by newlineusing water as solvent The Xray diffraction XRD studies confirm that the newlineLalanine LA belongs to the orthorhombic crystal system and newlinenoncentrosymmetric space group P212121High resolution Xray diffraction newlineHRXRD analysis reveals the crystalline perfection of the grown crystals newlineThe diffraction curve DC recorded for the LA crystal having a very sharp newlinesingle peak indicates that the LA crystal does not contain any low angle newlineboundaries and its crystalline perfection is very good newline newline