Nanooptics and photonics

Biopolymer DNA and Nanocomposites for Nonlinear Application
O.Krupka1,*, K. Waszkowska2, V.Smokal1, O. Kharchenko1, B. Sahraoui2
1Taras Shevchenko National University of Kyiv, Department of Chemistry, 60 Volodymyrska, 01033 Kyiv, Ukraine 
2UNAM, University of Angers, CNRS UMR 6200, Laboratory MOLTECH-Anjou, 2 bd Lavoisier, 49045 Angers, France 
3Department of Physics, Ivan Franko National University of Lviv, 8 Kyrylo and Mefodiy str., 79005 Lviv, Ukraine
*e-mail: oksana_krupka@yahoo.com  ; *e-mail bouchta.sahraoui@univ-angers.fr

The attention of researches has been recently attracted by an interesting idea of the biopolymeric nanodevices construction as well as their functionality modeling and practical design. Being in the focus of interest, DNA-nanotechnology can be addressed to different communities like molecular biology and biotechnology, drug delivery, medicine, photovoltaics, nanoelectronics etc. As it well known, one-dimensional structures with nanoscale size such as nanowires, nanorods and nanotubes have attracted considerable attention due to their peculiar structure characteristics and size effect. These materials often exhibit remarkable mechanical properties, as well as electrical, optical and electromagnetic properties that are quite different from those of their corresponding bulk materials. We recently shown that functional DNA adduct with photochromic molecules have potential applications for NLO, information storage, the controlled on/off digital switching [1, 2]. In molecular level a number of intermolecular forces come into play, including electrostatic repulsion by DNA, interactions between DNA bases, van de Waals force, and depletion force. In addition, specific NP interaction can be achieved by adding photochromic molecules. 
We report some preliminary results obtained in the fabrication of DNACTMA thin films and solution, and thin films doped with photoresponsive molecule and/or nanorods (NPs). 

Acknowledgements
O. K. acknowledges the European Cooperation in Science and Technology through COST Action MP1403 Nanoscale Quantum Optics.

1.	Krupka, O.; Elghayoury, A.; Rau, I.; Sahraoui, B.; Grote, J.; Kajzar, F.// Thin Solid Films.-2008.- 516.-P. 8932–8936.
2.	R. Czaplicki,O. Krupka,Z. Essaidi, El-Ghayoury, J.G. Grote, F. Kajzar, B. Sahraoui// Optic Express. – 2007.- 15– P. 15268-15273.