Nanostructured copper sulfide thin film via a spatial successive ionic layer adsorption and reaction process showing significant surface-enhanced infrared absorption of CO2. Issue 9 (30th January 2020)

• Record Type: Journal Article
• Authors: Zhang, Yujing; Chong, Xinyuan; Sun, Hao; Kedir, Muaz M.; Kim, Ki-Joong; Ohodnicki, Paul R.; Wang, Alan X.; Chang, Chih-hung
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 9(2020)
• Page Start: 3069
• Page End: 3078
• Publication Date: 2020-01-30
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc06423k
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A highly sensitive CO2 sensor, comprising nanostructured copper sulfide that exhibits desired localized surface plasmon resonance, demonstrates a significant surface-enhanced infrared absorption for 100 ppm CO2 with an enhancement factor of 10 4 . Abstract : The infrared (IR) gas sensing technique is excellent for CO2 gas detection systems that require high accuracy and safety standard; however, there is a significant barrier to its 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 process at room temperature. The resulting CuS thin film possesses a structure consisting of hexagonal nanoflakes, and demonstrates significant SEIRA for 100 ppm CO2 with an enhancement factor of 10 4 .