Decoupling Effects of Electrostatic Gating on Electronic Transport and Interfacial Charge-Transfer Kinetics at Few-Layer Molybdenum Disulfide

IF 4.8 Q2 NANOSCIENCE & NANOTECHNOLOGY
Sonal Maroo, Yun Yu, Takashi Taniguchi, Kenji Watanabe and D. Kwabena Bediako*, 
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引用次数: 1

Abstract

The electronic properties of electrode materials play a crucial role in defining their electrochemical behavior in energy conversion and storage devices. The assembly of van der Waals heterostructures and fabrication into mesoscopic devices enable the dependence of an electrochemical response on electronic properties to be systematically interrogated. Here, we evaluate the effect of charge carrier concentration on heterogeneous electron transfer at few-layer MoS2 electrodes by combining spatially resolved electrochemical measurements with field-effect electrostatic manipulation of band alignment. Steady-state cyclic voltammograms and finite-element simulations reveal a strong modulation of the measured electrochemical response for outer-sphere charge transfer at the electrostatic gate voltage. In addition, spatially resolved voltammetric responses, obtained at a series of locations at the surface of few-layer MoS2, reveal the governing role of in-plane charge transport on the electrochemical behavior of 2D electrodes, especially under conditions of low carrier densities.

Abstract Image

静电门控对少层二硫化钼电子输运和界面电荷转移动力学的去耦效应
电极材料的电子性质在确定其在能量转换和存储设备中的电化学行为方面起着至关重要的作用。范德华异质结构的组装和介观器件的制造使得电化学响应对电子性质的依赖性能够被系统地询问。在这里,我们通过将空间分辨电化学测量与能带排列的场效应静电操作相结合,评估了电荷载流子浓度对少层MoS2电极上非均匀电子转移的影响。稳态循环伏安图和有限元模拟揭示了在静电栅极电压下测量的外层电荷转移的电化学响应的强烈调制。此外,在少层MoS2表面的一系列位置获得的空间分辨伏安响应揭示了平面内电荷传输对2D电极电化学行为的控制作用,特别是在低载流子密度的条件下。
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来源期刊
ACS Nanoscience Au
ACS Nanoscience Au 材料科学、纳米科学-
CiteScore
4.20
自引率
0.00%
发文量
0
期刊介绍: ACS Nanoscience Au is an open access journal that publishes original fundamental and applied research on nanoscience and nanotechnology research at the interfaces of chemistry biology medicine materials science physics and engineering.The journal publishes short letters comprehensive articles reviews and perspectives on all aspects of nanoscience and nanotechnology:synthesis assembly characterization theory modeling and simulation of nanostructures nanomaterials and nanoscale devicesdesign fabrication and applications of organic inorganic polymer hybrid and biological nanostructuresexperimental and theoretical studies of nanoscale chemical physical and biological phenomenamethods and tools for nanoscience and nanotechnologyself- and directed-assemblyzero- one- and two-dimensional materialsnanostructures and nano-engineered devices with advanced performancenanobiotechnologynanomedicine and nanotoxicologyACS Nanoscience Au also publishes original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials engineering physics bioscience and chemistry into important applications of nanomaterials.
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