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Research Letters in Nanotechnology
Volume 2009, Article ID 540257, 5 pages
http://dx.doi.org/10.1155/2009/540257
Research Letter

Effect of Premelting on Conductivity of DNA-Lipid Films

1Laboratoire de Physique des Solides, UMR 8502 CNRS, Bâtiment 510, Université Paris-Sud, 91405 Orsay Cedex, France
2Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences (RAS), 142432 Chernogolovka, Moscow Region, Russia
3RIKEN, Hirosawa 2-1, Wakō, Saitama 351-0198, Japan
4Laboratoire de Physique du Solide, CNRS UPR 5, Ecole Supérieure de Physique et Chimie Industrielles de la Ville de Paris (ESPCI), 75231 Paris Cedex, France
5Laboratoire de Matériaux et Phénomène Quantiques (UMR 7162), UMR 7162, Université Denis-Diderot-Paris 7, 75251 Paris, France
6Service de Physique de l'Etat Condensé, Commissariat à l'Énergie Atomique (CEA), Centre d'études de Saclay, 91191 Gif-sur-Yvette, France
7Department of Biomolecular Engineering, Tokyo Institute of Technology, 4259 Nagatsuda, Midori-ku, Yokohama 226-8501, Japan

Received 17 November 2008; Accepted 30 January 2009

Academic Editor: Joseph Irudayaraj

Copyright © 2009 A. Yu. Kasumov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have measured temperature-dependent (between 20 and 8 0 C) electrical conductivity and molecular structure (Raman spectroscopy) of DNA-lipid cast film. Our findings show that the conductivity is strongly influenced by premelting effects in the molecular structure starting near physiological temperatures ( 4 0 C), prior to the global DNA denaturation.