DataVXAdvanced Materials TechnologiesPaper
journal article·2020-01

Strain‐Induced Band‐Gap Tuning of 2D‐SnSSe Flakes for Application in Flexible Sensors

Lena Du, Cong Wang, Wenqi Xiong, Bin Wei, Fengyou Yang, Shengyao Chen, Lijun Ma, Xiaofeng Wang, Congxin Xia, Xinzheng Zhang, Zhongchang Wang, Qian Liu

Advanced Materials Technologies· Volume 5· Issue 1
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Source abstract

Abstract

Abstract Flexible strain‐sensitive‐material‐based sensors are desired owing to their widespread applications in intelligent robots, health monitoring, human motion detection, and other fields. High electrical–mechanical coupling behaviors of 2D materials make them one of the most promising candidates for miniaturized, integrated, and high‐resolution strain sensors, motivating to explore the influence of strain‐induced band‐gap changes on electrical properties of more materials and assess their potential application in strain sensors. Herein, a ternary SnSSe alloy nanosheet‐based strain sensor is reported showing an enhanced gauge factor (GF) up to 69.7 and a good reproducibility and linearity within strain of 0.9%. Such sensor holds high‐sensitive features under low strain, and demonstrates an improved sensitivity with a decrease in the membrane thickness. The high sensitivity is attributed to widening band gap and density of states reduction induced by strain, as verified by theoretical model and first‐principles calculations. These findings show that a sensor with adjustable strain sensitivity might be realized by simply changing the elemental constituents of 2D alloying materials.
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Research context

Metals & alloysNanomaterials

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Gas Sensing Nanomaterials and Sensors · Innovative Energy Harvesting Technologies

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

Affiliations

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology University of Chinese Academy of Sciences Beijing 100190 P. R. China

Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen 518055 P. R. China

The MOE Key Laboratory of Weak‐Light Nonlinear Photonics TEDA Institute of Applied Physics Nankai University Tianjin 300457 P. R. China

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Department of Physics Henan Normal University Xinxiang 453007 P. R. China

Department of Quantum and Energy Materials International Iberian Nanotechnology Laboratory (INL) Avenida Mestre José Veiga s/n Braga 4715‐330 Portugal

Funding

National Natural Science Foundation of China

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