Journal article
Self-Organization of Ions at the Interface between Graphene and Ionic Liquid DEME-TFSI
ACS applied materials & interfaces, Vol.9(40), pp.35437-35443
10/11/2017
DOI: 10.1021/acsami.7b10912
PMID: 28920423
Abstract
Electrochemical effects manifest as nonlinear responses to an applied electric field in electrochemical devices, and are linked intimately to the molecular orientation of ions in the electric double layer (EDL). Herein, we probe the origin of the electrochemical effect using a double-gate graphene field effect transistor (GFET) of ionic liquid N,N-diethyl-N-(2-methoxyethyl)-N-methylammonium bis(trifluoromethylsulfonyl)imide (DEME-TFSI) top-gate, paired with a ferroelectric Pb0.92La0.08Zr0.52Ti0.48O3 (PLZT) back-gate of compatible gating efficiency. The orientation of the interfacial molecular ions can be extracted by measuring the GFET Dirac point shift, and their dynamic response to ultraviolet–visible light and a gate electric field was quantified. We have observed that the strong electrochemical effect is due to the TFSI anions self-organizing on a treated GFET surface. Moreover, a reversible order–disorder transition of TFSI anions self-organized on the GFET surface can be triggered by illuminating the interface with ultraviolet–visible light, revealing that it is a useful method to control the surface ion configuration and the overall performance of the device.
Details
- Title: Subtitle
- Self-Organization of Ions at the Interface between Graphene and Ionic Liquid DEME-TFSI
- Creators
- Guangliang Hu - University of KansasGaind P Pandey - Kansas State UniversityQingfeng Liu - University of KansasRadhika S Anaredy - University of IowaChunrui Ma - State Key Laboratory for Mechanical Behavior of MaterialsMing Liu - Xi’an Jiaotong UniversityJun Li - Kansas State UniversityScott K Shaw - University of IowaJudy Wu - University of Kansas
- Resource Type
- Journal article
- Publication Details
- ACS applied materials & interfaces, Vol.9(40), pp.35437-35443
- Publisher
- American Chemical Society
- DOI
- 10.1021/acsami.7b10912
- PMID
- 28920423
- ISSN
- 1944-8244
- eISSN
- 1944-8252
- Grant note
- DOI: 10.13039/100000165, name: Division of Chemistry, award: CHE-1651381; DOI: 10.13039/501100002338, name: Ministry of Education of the People's Republic of China; DOI: 10.13039/501100002855, name: Ministry of Science and Technology of the People's Republic of China, award: 2015CB654903; DOI: 10.13039/100000183, name: Army Research Office, award: W911NF-16-1-0029; DOI: 10.13039/100001309, name: Research Corporation for Science Advancement; DOI: 10.13039/501100002858, name: China Postdoctoral Science Foundation, award: 2015M582649; DOI: 10.13039/100000104, name: National Aeronautics and Space Administration, award: NNX13AD42A; DOI: 10.13039/100006770, name: American Chemical Society Petroleum Research Fund, award: 55279-DNI5; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China, award: 51390472, 61631166004; DOI: 10.13039/100000078, name: Division of Materials Research, award: DMR-1337737, DMR-1508494
- Language
- English
- Date published
- 10/11/2017
- Academic Unit
- Chemistry
- Record Identifier
- 9983985997402771
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