• Srinivasa

      Articles written in Pramana – Journal of Physics

    • Orientational order parameters of nematogenic trans-4-propyl cyclohexyl-4 (trans-4-alkyl cyclohexyl) benzoates

      Srinivasa M M M Abdoh N C Shivaprakash J Shashi-Dhara Prasad

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      The refractive indices and densities of three members of trans-4-propyl cyclohexyl-4 (trans-4-alkyl cyclohexyl) benzoates are reported as functions of temperature in the nematic and isotropic phases. The principal molecular polarizabilities and order parameters (S) have been evaluated using the anisotropic internal field model (Neugebauer’s approach). Also order parameters have been estimated by studying the dipole-dipole splittings in the wide line proton magnetic resonance (PMR) spectra. The results obtained are in close agreement with those obtained from refractive index measurements.

    • Langmuir Blodgett multilayers and related nanostructures

      S S Major S S Talwar R S Srinivasa

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      Langmuir Blodgett (LB) process is an important route to the development of organized molecular layered structures of a variety of organic molecules with suitably designed architecture and functionality. LB multilayers have also been used as templates and precursors to develop nano-structured thin films. In this article, studies on the molecular packing and three-dimensional structure of prototypic cadmium arachidate (CdA), zinc arachidate (ZnA) and mixed CdA-ZnA LB multilayers are presented. The formation of semiconducting nano-clusters of CdS, ZnS and CdxZn1−xS alloys within the organic multilayer matrix, using arachidate LB multilayers as precursors is also discussed.

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