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Nanotechnology. 2012 Aug 17;23(32):325201. doi: 10.1088/0957-4484/23/32/325201. Epub 2012 Jul 23.

Electrically controlled polarized photoluminescence of CdSe/ZnS nanorods embedded in a liquid crystal template.

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1
National Research University of Information Technologies, Mechanics and Optics, 197101 St-Petersburg, Russia.

Abstract

A novel homogeneous composite material, consisting of luminescent CdSe/ZnS quantum nanorods, embedded in the nematic liquid crystal 5CB, has been prepared. Liquid crystal cells and free-standing stretched polymer films incorporating this composite material were characterized using polarized micro-photoluminescence and electro-optical measurements under an applied electric field. A liquid crystal induced, macroscopic orientation of the nanorods in a thin layer of the material has been demonstrated. A conventional liquid crystal cell, filled with this composite, exhibits 40% modulation of the nanorod's photoluminescence intensity when subjected to an external electric field. These results indicate that quantum nanorods may have practical applications in photonic devices.

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