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Nanostructured CuS Thin Film via a Spatial Successive Ionic Layer Adsorption and Reaction Process Showing Significant Surface-Enhanced Infrared Absorption of CO2

Abstract

Infrared (IR) imaging gas sensing technique is excellent for CO2 gas detection systems that require high accuracy and safety standards; however, there is a significant barrier in application due to its high cost and difficulty in miniaturization. CO2 sensors that are functional within near- or short-wavelength IR have the potential to reduce this barrier. In this work, a highly sensitive plasmonic material based on nanostructured covellite copper sulfide (CuS), which exhibits desired localized surface plasmon resonance for surface-enhanced IR absorption (SEIRA) throughout near- and mid-IR ranges, was investigated. We prepared CuS thin films facilely in an additive manner based on a spatial successive ionic layer adsorption and reaction, Spatial SILAR, process. The Spatial SILAR can be implemented in a direct-write, demonstrating also in this study, to fabricate patterned films. The resulting CuS thin film possesses a porous microstructure consisting of hexagonal nanoflakes and demonstrates significant SEIRA for 100-ppm CO2 with an enhancement factor of 10^4.

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Supplementary files

Article information


Submitted
22 Nov 2019
Accepted
12 Jan 2020
First published
15 Jan 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Nanostructured CuS Thin Film via a Spatial Successive Ionic Layer Adsorption and Reaction Process Showing Significant Surface-Enhanced Infrared Absorption of CO2

Y. Zhang, X. Chong, H. Sun, M. Kedir, K. Kim, P. Ohodnicki, A. Wang and C. Chang, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/C9TC06423K

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