Reduction-oxidation dynamics of oxidized graphene : Functional group composition dependent path to reduction
Abstract
Micrometer-sized oxidation patterns containing varying composition of functional groups including epoxy, ether, hydroxyl, carbonyl, carboxyl, were created in chemical vapor deposition grown graphene through scanning probe lithography and pulsed laser two-photon oxidation. The oxidized graphene films were then reduced by a focused x-ray beam. Through in-situ x-ray photoelectron spectroscopy measurement, we found that the path to complete reduction depends critically on the total oxygen coverage and concentration of epoxy and ether groups. Over the threshold concentrations, a complex reduction-oxidation process involving conversion of functional groups of lower binding energy to higher binding energy is observed. The experimental observation is discussed and compared to previous work on reduced graphene oxide.
Main Authors
Format
Articles
Research article
Published
2018
Series
Subjects
Publication in research information system
Publisher
Pergamon
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201712284889Use this for linking
Review status
Peer reviewed
ISSN
0008-6223
DOI
https://doi.org/10.1016/j.carbon.2017.12.047
Language
English
Published in
Carbon
Citation
- Hong, Y.-Z., Tsai, H.-C., Wang, Y.-H., Aumanen, J., Myllyperkiö, P., Johansson, A., Kuo, Y.-C., Chang, L.-Y., Chen, C.-H., Pettersson, M., & Woon, W.-Y. (2018). Reduction-oxidation dynamics of oxidized graphene : Functional group composition dependent path to reduction. Carbon, 129(April), 396-402. https://doi.org/10.1016/j.carbon.2017.12.047
License
Copyright© Elsevier Ltd, 2018. This is a final draft version of an article whose final and definitive form has been published by Elsevier Ltd. Published in this repository with the kind permission of the publisher.