Tailoring the Electrochemical Properties of Carbon Nanotube Modified Indium Tin Oxide via in Situ Grafting of Aryl Diazonium

Jacqueline M. Hicks, Zhi Yi Wong, David J. Scurr, Nigel Silman, Simon K. Jackson, Paula M. Mendes, Jonathan W. Aylott, Frankie J. Rawson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Our ability to tailor the electronic properties of surfaces by nanomodification is paramount for various applications, including development of sensing, fuel cell, and solar technologies. Moreover, in order to improve the rational design of conducting surfaces, an improved understanding of structure/function relationships of nanomodifications and effect they have on the underlying electronic properties is required. Herein, we report on the tuning and optimization of the electrochemical properties of indium tin oxide (ITO) functionalized with single-walled carbon nanotubes (SWCNTs). This was achieved by controlling in situ grafting of aryl amine diazonium films on the nanoscale which were used to covalently tether SWCNTs. The structure/function relationship of these nanomodifications on the electronic properties of ITO was elucidated via time-of-flight secondary ion mass spectrometry and electrochemical and physical characterization techniques which has led to new mechanistic insights into the in situ grafting of diazonium. We discovered that the connecting bond is a nitro group which is covalently linked to a carbon on the aryl amine. The increased understanding of the surface chemistry gained through these studies enabled us to fabricate surfaces with optimized electron transfer kinetics. The knowledge gained from these studies allows for the rational design and tuning of the electronic properties of ITO-based conducting surfaces important for development of various electronic applications.

Original languageEnglish
Pages (from-to)4924-4933
Number of pages10
JournalLangmuir
Volume33
Issue number20
DOIs
Publication statusPublished - 23 May 2017

Bibliographical note

Funding Information:
This work was supported by the Biotechnology and Biological Sciences Research Council and Leverhulme Trust (ECF/2013-603). Dr. F. J. Rawson would also like to thank the University of Nottingham for funding via his awarded Nottingham Research Fellowship.

Publisher Copyright:
© 2017 American Chemical Society.

Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

Fingerprint

Dive into the research topics of 'Tailoring the Electrochemical Properties of Carbon Nanotube Modified Indium Tin Oxide via in Situ Grafting of Aryl Diazonium'. Together they form a unique fingerprint.

Cite this