Shear-force exfoliation of indium and gallium chalcogenides for selective gas sensing applications

Nanoscale
Petr MarvanZdeněk Sofer

Abstract

Layered chalcogenides AIIIBVI of gallium and indium form a group of semiconducting nanomaterials with huge potential in electronic, sensor and energy storage applications. However, the preparation method predetermines the usage of the prepared nanomaterial. In this paper, we investigated shear-force milling exfoliation in a surfactant free water/ethanol mixture on indium and gallium chalcogenides and their utilization in the gas sensing of volatile organic compounds (VOCs). The exfoliation of bulk materials in a surfactant-free environment helped to avoid any surface contamination and allowed the preparation of materials without non-covalently bonded large organic molecules. Furthermore, the gas-sensing properties were evaluated by electrical impedance spectroscopy on VOCs. Our results showed high sensitivity and selectivity towards methanol. This suggests that shear-force milling is an effective method for the exfoliation of indium and gallium chalcogenides which can find application in the selective gas sensing of VOCs.

References

Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Aug 24, 2013·Advanced Materials·Garry W MuddAlexandr I Dmitriev
Dec 24, 2013·ACS Nano·Robin B Jacobs-GedrimBin Yu
Mar 27, 2015·Nanoscale·Zhenxing WangJun He
May 14, 2016·Advanced Materials·Jose J FonsecaOscar D Dubon

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Citations

Nov 2, 2019·Beilstein Journal of Nanotechnology·Katsuhiko ArigaJun Takeya
Jan 28, 2020·Nanoscale·Bo ZhangTomas Wagner
Jun 24, 2021·ACS Applied Materials & Interfaces·Pradip Kumar RoyZdeněk Sofer
Jul 20, 2021·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Marilena I ZappiaFrancesco Bonaccorso

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Methods Mentioned

BETA
transmission electron microscopy
scanning electron microscopy
X-ray
electron diffraction

Software Mentioned

STREM

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