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    Molecular packing in cadmium and zinc arachidate LB Multilayers

    Year: 2002

    Journal: Colloids and Surfaces, A: Physicochemical and Engineering Aspects 198-200 (2002) 75-81, 20111221

    Authors: N. Prasanth Kumar , S. Major , Satish Vitta , S.S. Talwar , P. Dubcek H. Amenitsch , S. Bernstorff , V. Ganesan , Ajay Gupta , B.A. Dasannacharya

    Organizations: a Department of Physics, Indian Institute of Technology Bombay, Mumbai 400 076, India b Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400 076, India c Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India d Sincrotrone Trieste, 34012 Basovizza (TS ), Trieste, Italy e Inter University Consortium for Department of Atomic Energy Facilities, University Campus, Indore 452 017, India

    A combination of grazing incidence X-ray reflection/diffraction (GIXR/GIXD) and atomic force microscopy have been used to study the 3D structure in cadmium arachidate (CdA) and single phase zinc arachidate (ZnA) LB multilayers. The CdA multilayers have an ideal close packed herringbone structure. The molecules have a non-centred in-plane arrangement with specific orientational relation between the central and the corner molecules. In contrast, the ZnA multilayers have a hexagonal layer plane packing with tilted molecules. The molecules are loosely packed with rotational freedom about chain axis as observed in "rotator" phases.