Gate-controlled gas sensor utilizing 1D-2D hybrid nanowires network

Juyeon Seo; Seung Hyun Nam; Moonsang Lee; Jin-Young Kim; Seung Gyu Kim; Changkyoo Park; Dong-Woo Seo; Young Lae Kim; Sang Sub Kim; Un Jeong Kim; Myung Gwan Hahm

doi:10.1016/j.isci.2021.103660

Gate-controlled gas sensor utilizing 1D-2D hybrid nanowires network

iScience. 2021 Dec 21;25(1):103660. doi: 10.1016/j.isci.2021.103660. eCollection 2022 Jan 21.

Authors

Affiliations

¹ Department of Materials Science and Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea.
² Department of Laser and Electron Beam Technologies, Korea Institute of Machinery and Materials, Daejeon 34103, Republic of Korea.
³ Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-ro, Goyang-Si, Gyeonggi-Do 10223, Republic of Korea.
⁴ Department of Electronic Engineering, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea.
⁵ Advanced Sensor Laboratory, Samsung Advanced Institute of Technology, Suwon 443-803, Republic of Korea.

Abstract

Novel gas sensors that work at room temperature are attracting attention due to their low energy consumption and stability in the presence of toxic gases. However, the development of sensing characteristics at room temperature is still a primary challenge. Diverse reaction pathways and low adsorption energy for gas molecules are required to fabricate a gas sensor that works at room temperature with high sensitivity, selectivity, and efficiency. Therefore, we enhanced the gas sensing performance at room temperature by constructing hybridized nanostructure of 1D-2D hybrid of SnSe₂ layers and SnO₂ nanowire networks and by controlling the back-gate bias (V_g = 1.5 V). The response time was dramatically reduced by lowering the energy barrier for the adsorption on the reactive sites, which are controlled by the back gate. Consequently, we believe that this research could contribute to improving the performance of gas sensors that work at room temperature.

Keywords: Biotechnology; Nanotechnology; Sensor.