Shapir, Errez and Yi, Juyeon and Cohen, Hezy and Kotlyar, Alexander B. and Cuniberti, Gianaurelio and Porath, Danny (2005) The puzzle of contrast inversion in DNA STM imaging (issue cover). Journal of Physical Chemistry B 109 (30), pp. 14270-14274.
Full text not available from this repository.
Other URL: http://dx.doi.org/10.1021/jp052738e
DNA has been at the center of an imaging effort since the invention of the scanning tunneling microscope (STM). In some of the STM imaging reports the molecules appeared with negative contrast, i.e., ``submerged'' under the metal background and darker. We demonstrate the phenomenon of contrast inversion in DNA STM imaging by controlled and spontaneous contrast inversions and by the dependence of the DNA apparent height with respect to the surface on the imaging bias voltage. Using these characterizations, we formulate a model explaining the above phenomenon by resonant tunneling through virtual states in the vacuum between the STM tip and the DNA molecule.
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Gianaurelio Cuniberti|
|Projects:||EU Grant: DNA-based molecular nanowires, Graduiertenkolleg Nichtlinearität und Nichtgleichgewicht, Volkswagen Stiftung: Molecular Computing|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||05 Aug 2009 13:32|