Large-scale synthesis of single-crystalline self-standing SnSe2 nanoplate arrays for wearable gas sensors

Nanotechnology
Ming ChenChunlei Yang

Abstract

Advances in two-dimensional semiconducting thin films enable the realization of wearable electronic devices in the form factor of flexible substrate/thin films that can be seamlessly adapted in our daily lives. For wearable gas sensing, two-dimensional materials, such as SnSe2, are particularly favorable because of their high surface-to-volume ratio and strong adsorption of gas molecules. Chemical vapor deposition and liquid/mechanical exfoliation are the widely applied techniques to obtain SnSe2 thin films. However, these methods normally result in non-uniform and isolated flakes which cannot apply to the practical industrial-scale wearable electronic devices. Here, we demonstrate large-scale (10 cm × 10 cm), uniform, and self-standing SnSe2 nanoplate arrays by co-evaporation process on flexible polyimide substrates. Both structural and morphological properties of the resulting SnSe2 nanoplates are systematically investigated. Particularly, the single-crystalline SnSe2 nanoplates are achieved. Furthermore, we explore the application of the polyimide/SnSe2 nanoplate arrays as wearable gas sensors for detecting methane. The wearable gas sensors show high sensitivity, fast response and recovery, and good uniformity. Our approach ...Continue Reading

References

Mar 30, 2011·Chemical Communications : Chem Comm·Jaewon ChoiSeung Uk Son
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Mar 21, 2013·Nature Chemistry·Manish ChhowallaHua Zhang
Dec 18, 2014·Nature Communications·Deji AkinwandeJames Hone
Sep 26, 2015·ACS Nano·Hua Zhang
Feb 3, 2016·Advanced Materials·Minhoon ParkJong-Hyun Ahn
Jul 9, 2016·ACS Applied Materials & Interfaces·Byungjin ChoMyung Gwan Hahm
Nov 11, 2017·Scientific Reports·Emma P MukhokosiKaruna K Nanda

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