WO/WS Nanocomposites for Fast-Response Room Temperature Gas Sensing

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2025 Feb 13

PMID 39942669

Authors

Svetlana S Nalimova

Zamir V Shomakhov

Oksana D Zyryanova

Valeriy M Kondratev

Cong Doan Bui

Sergey A Gurin

Vyacheslav A Moshnikov

Anton A Zhilenkov

Affiliations

Soon will be listed here.

Abstract

Currently, semiconductor gas sensors are being actively studied and used in various fields, including ecology, industry, and medical diagnostics. One of the major challenges is to reduce their operating temperature to room temperature. To address this issue, sensor layers based on WO/WS nanostructures synthesized by the hydrothermal method have been proposed. In this paper, the morphology of the material's surface and its elemental composition were investigated, as well as the optical band gap. Additionally, changes in the resistance of the WO/WS sensor layers under the influence of alcohol vapors at room temperature were analyzed. The results showed that the layers exhibited a significant response, with short response and recovery times. The achieved response value to 1000 ppm of isopropanol was 1.25, with a response time of 13 s and a recovery time of 12 s. The response to 1000 ppm of ethanol was 1.35, and the response and recovery times were 20 s. This indicates that these sensor layers have promising potential for various applications.

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