Skip to content.

TUD

search  |  internal  |  deutsch
Personal tools
TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology


prev/next pubs | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996

[back]


40. 


Dissipative effects in a DNA ladder model



R. Gutiérrez, S. Mandal, and G. Cuniberti

In Proc. of the 4th IEEE Conference on Nanotechnology. Edited by P. Lugli. Printed by IEEE (2004)


ISBN: 0780385365

A large amount of research has been invested in the last years to investigate electron transfer and transport in DNA molecules. Partially contradicting results have been obtained; so was DNA identified as insulator, wide-band gap semiconductor or metallic. Several factors like base-pairs sequences, static and dynamic disorder and properties of the environment have been shown to strongly influence charge propagation along the double helix. We focus on environmental effects and investigate within a model Hamiltonian approach electronic transport in a DNA-like wire strongly coupled to a dissipative bath, which mimics the effect of counterions and hydration shells. We find a bath-induced pseudo-gap in the electronic structure of the wire, which leads to a crossover from a purely semiconducting behavior with a "true" gap (zero density of states) in the electronic transmission to a metallic behaviour induced by thermal bath fluctuations. As a result the temperature dependence of the transmission near the Fermi energy manifests activated Arrhenius-like behavior and it shows a weakly exponential dependence on the wire length, indicative of strong incoherent transport.



online .pdf paper (for personal use only)online .pdf paper (for personal use only)
doi absolute link10.1109/NANO.2004.1392445
online abstract at the publisher site
publisher site (ISSN:1098-0121)
order a copy of the book (ISBN:0780385365)
export BibTeX citation (txt file)
export EndNote citation (ris file)


prev/next 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996

[back]



















































last modified: 2017.04.24 Mo
author: webadmin

contact
Prof. Dr. Gianaurelio Cuniberti
secretariat:
Ms Sylvi Katzarow
phone: +49 (0)351 463-31420
fax: +49 (0)351 463-31422
office@nano.tu-dresden.de
postal address:
Institute for Materials Science
TU Dresden
01062 Dresden, Germany
visitors and courier address:
HAL building
TU Dresden
Hallwachsstr. 3
01069 Dresden, Germany
Max Bergmann Center
TU Dresden
Budapester Str. 27
01069 Dresden, Germany