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Sequence dependent interaction of single stranded DNA with graphitic flakes: atomistic molecular dynamics simulations

Published online by Cambridge University Press:  05 February 2016

Ho Shin Kim
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, U.S.A.
Sabrina M. Huang
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, U.S.A.
Yaroslava G. Yingling*
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, U.S.A.
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Abstract

In an attempt to understand the structure and dynamics of ssDNA on graphene based surfaces, we performed all-atom implicit solvent molecular dynamics simulations of ssDNA on graphene and graphene oxide (GO) surfaces. Simulations indicate that adsorption of poly(A), poly(T) and poly (AT) have similar mechanisms of adsorption to free standing graphitic flakes, which are governed by a surface oxygen content. Specifically, higher oxygen content of a surface leads to decrease in persistence length of ssDNA. However, the role of DNA sequence on the physisorption mechanism is minimal.

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Copyright
Copyright © Materials Research Society 2016 

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