DataVXACS Applied Materials & InterfacesPaper
journal article·2017-10-11

Self-Organization of Ions at the Interface between Graphene and Ionic Liquid DEME-TFSI

Guangliang Hu, Gaind P. Pandey, Qingfeng Liu, Radhika S. Anaredy, Chunrui Ma, Ming Liu, Jun Li, Scott K. Shaw, Judy Wu

ACS Applied Materials & Interfaces· Volume 9· Issue 40
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Source abstract

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 Pb 0.92 La 0.08 Zr 0.52 Ti 0.48 O 3 (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.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsElectronic materials

OpenAlex topics: Electrochemical Analysis and Applications · Supercapacitor Materials and Fabrication · Ionic liquids properties and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China

School of Microelectronics, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China

Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, United States

Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States

Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States

Funding

Division of Chemistry · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Army Research Office · Research Corporation for Science Advancement · China Postdoctoral Science Foundation · National Aeronautics and Space Administration · American Chemical Society Petroleum Research Fund · National Natural Science Foundation of China · Division of Materials Research

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