Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Gas sensitivity of WOx/WS2 nanocomposites at room temperature under ultraviolet irradiation

Z.V. Shomakhov1, S.S. Nalimova2, O.D. Zyryanova2, V.M. Kondratev3,4, Z.Kh. Kalazhokov1, C.D. Bui2, V.A. Moshnikov2

1 Kabardino-Balkarian State University named after H.M. Berbekov
2 Saint Petersburg Electrotechnical University «LETI»
3 Moscow Institute of Physics and Technology
4 Alferov University

DOI: 10.26456/pcascnn/2024.16.1060

Original article

Abstract: Currently, semiconductor gas sensors are of interest for various applications, including industry, medicine and environmental monitoring. One of the most important tasks in the sensor technology is to reduce the operating temperature of devices. In this paper, it is proposed to use WOx/WS2 nanostructures obtained by a hydrothermal method to solve this problem. The morphology, structure, and composition of the developed nanostructures were studied using scanning electron microscopy, reflected electron diffraction and X-ray photoelectron spectroscopy. It is shown that the nanostructures are formed by 1D and 2D nanoobjects with an average length of 200 nm and are nanocomposites consisting of tungsten oxide WOx and tungsten disulfide WS2. The study of sensory properties when exposed to isopropanol, ethanol and acetone vapors at room temperature was carried out. A reversible change in resistance is demonstrated when these gases appear in the atmosphere. Additionally, exposure to ultraviolet radiation during the measurement process leads to an increase in the response value and speed of the sensor layers in the case of interaction with isopropanol and ethanol vapors.

Keywords: gas sensors, room temperature, nanostructures, tungsten oxide, tungsten disulfide, nanocomposites

  • Zamir V. Shomakhov – Ph. D., Director of the Institute of artificial intelligence and digital technologies, Kabardino-Balkarian State University named after H.M. Berbekov
  • Svetlana S. Nalimova – Ph. D., Docent, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
  • Oksana D. Zyryanova – 4th year student, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
  • Valeriy M. Kondratev – Junior Researcher, Laboratory of Functional Nanomaterials, Moscow Institute of Physics and Technology, Junior Researcher, Laboratory of Optics of Heterogeneous Structures and Optical Materials Alferov University
  • Zamir Kh. Kalazhokov – Ph. D., Docent, Department of Nanosystems Physics, Kabardino-Balkarian State University named after H.M. Berbekov
  • Cong D. Bui – 2nd year postgraduate student, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
  • Vyacheslav A. Moshnikov – Dr. Sc., Professor, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»

Reference:

Shomakhov, Z.V. Gas sensitivity of WOx/WS2 nanocomposites at room temperature under ultraviolet irradiation / Z.V. Shomakhov, S.S. Nalimova, O.D. Zyryanova, V.M. Kondratev, Z.Kh. Kalazhokov, C.D. Bui, V.A. Moshnikov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2024. — I. 16. — P. 1060-1070. DOI: 10.26456/pcascnn/2024.16.1060. (In Russian).

Full article (in Russian): download PDF file

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