Liquid-Crystalline Polymer Composites with CdS Nanorods: Structure and Optical Properties

• DOI: 10.1021/la203258r
• Publication Date: 2011-09-13T09:56:25Z
• Authors: Alexander A. Ezhov; Georgii A. Shandryuk; Galina N. Bondarenko; Alexey S. Merekalov; Sergey S. Abramchuk; Alina M. Shatalova; Pramit Manna; Eugene R. Zubarev; Raisa V. Talroze
• Keywords: Nanorod; Polymer nanocomposite

We report on the structure, uniaxial orientation, and photoluminescent properties of CdS nanorods that form stable nanocomposites with smectic C hydrogen-bonded polymers from family poly(4-(n-acryloyloxyalkoxy)benzoic acids. TEM analysis microtomed films reveals small domains are homogeneously distributed in LC polymer matrix. They undergo long-range orientation formation one-dimensional aggregates rods when composite uniaxially deformed. The Stokes photoluminescence was observed NRs/LC composites emission peak located almost at same wavelength as NRs solution heptane. An anti-Stokes (ASPL) found under excitation below nanoparticles ground state. mechanism ASPL interpreted terms thermally populated states involved process. These represent an unusual material which optical anisotropic semiconductor nanostructures can be controlled by mechanical deformation liquid-crystalline