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TiO₂ nanowire dispersions in viscous polymer matrix: electrophoretic alignment and optical properties
Andris Šutka1, Kristjan Saal, Vambola Kisand
1Institute of Silicate Materials, Riga Technical University, Azenes 14/24, Riga, LV-1048, Latvia. Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia. Estonian Nanotechnology Competence Center, Riia 142, 51014 Tartu, Estonia.
Abstract:
The changes in optical properties during TiO₂ nanowire orientation in polydimethylsiloxane (PDMS) matrix under the influence of an electric field are strongly influenced by nanowire (NW) diameter. It was demonstrated for the first time that either positive or negative change in transmittance can be induced by NW alignment parallel to the electric field depending on the NW diameter. These effects can be explained by the interplay between scattering and reflectance. Experimental findings reported could be important for smart window applications for the regulation of visible or even infrared transparency, thus reducing the energy consumption by air conditioning systems in buildings and automobiles in the future.
