TCB Publications - Abstract

TCB Publications - Abstract

Anuj Girdhar, Chaitanya Sathe, Klaus Schulten, and Jean-Pierre Leburton. Graphene quantum point contact transistor for DNA sensing. Proceedings of the National Academy of Sciences, USA, 110:16748-16753, 2013. (PMC: 3801026)

GIRD2013 By using the Non-Equilibrium Green’s Function technique we show that the shape of the edge, the carrier concentration, and the position and size of a nanopore in graphene nanoribbons can strongly affect its electronic conductance as well as its sensitivity to external charges. This technique, combined with a self-consistent Poisson-Boltzmann formalism to account for ion charge screening in solution, is able to detect the rotational and positional conformation of a DNA strand inside the nanopore. In particular, we show that a graphene membrane with quantum point contact (QPC) geometry exhibits greater electrical sensitivity than a uniform armchair geometry provided that the carrier concentration is tuned to enhance charge detection. We propose a membrane design that contains an electrical gate in a configuration similar to a field effect transistor for a graphene-based DNA sensing device.

Download Full Text

The manuscripts available on our site are provided for your personal use only and may not be retransmitted or redistributed without written permissions from the paper's publisher and author. You may not upload any of this site's material to any public server, on-line service, network, or bulletin board without prior written permission from the publisher and author. You may not make copies for any commercial purpose. Reproduction or storage of materials retrieved from this web site is subject to the U.S. Copyright Act of 1976, Title 17 U.S.C.

Download full text: Supplemental Material (986.4KB) - Supplementary PDF, Journal, Request a Copy, Additional Information