Fast DNA Sequencing with a Graphene-based Nanochannel Device

Overview

Journal Nat Nanotechnol

Specialty Biotechnology

Date 2011 Feb 8

PMID 21297626

Citations 57

Authors

Seung Kyu Min

Woo Youn Kim

Yeonchoo Cho

Kwang S Kim

Affiliations

Soon will be listed here.

Abstract

Devices in which a single strand of DNA is threaded through a nanopore could be used to efficiently sequence DNA. However, various issues will have to be resolved to make this approach practical, including controlling the DNA translocation rate, suppressing stochastic nucleobase motions, and resolving the signal overlap between different nucleobases. Here, we demonstrate theoretically the feasibility of DNA sequencing using a fluidic nanochannel functionalized with a graphene nanoribbon. This approach involves deciphering the changes that occur in the conductance of the nanoribbon as a result of its interactions with the nucleobases via π-π stacking. We show that as a DNA strand passes through the nanochannel, the distinct conductance characteristics of the nanoribbon (calculated using a method based on density functional theory coupled to non-equilibrium Green function theory) allow the different nucleobases to be distinguished using a data-mining technique and a two-dimensional transient autocorrelation analysis. This fast and reliable DNA sequencing device should be experimentally feasible in the near future.

Citing Articles

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