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Issue 18, 2018
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Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

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Abstract

The fabrication of highly efficient bio-organic nanoelectronic devices is still a challenge due to the difficulty in interfacing the biomolecular component to the organic counterparts. One of the ways to overcome this bottleneck is to add a self-assembled monolayer (SAM) in between the electrode and the biological material. The addition of a pyrene–nitrilotriacetic acid layer to a graphene metal electrode enhances the charge transfer within the device. Our theoretical calculations and electrochemical results show that the formation of a pyrene–nitrilotriacetic acid SAM enforces a direct electron transfer from graphene to the SAM, while the addition of the Ni2+ cation and imidazole reverses the charge transfer direction, allowing an atomic control of the electron flow, which is essential for a true working device.

Graphical abstract: Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

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Supplementary files

Article information


Submitted
01 Feb 2018
Accepted
22 Mar 2018
First published
01 May 2018

This article is Open Access

J. Mater. Chem. C, 2018,6, 5046-5054
Article type
Paper

Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

S. Osella, M. Kiliszek, E. Harputlu, C. G. Unlu, K. Ocakoglu, J. Kargul and B. Trzaskowski, J. Mater. Chem. C, 2018, 6, 5046
DOI: 10.1039/C8TC00564H

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    [Original citation] - Published by The Royal Society of Chemistry.

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