Study of a Nanostructured Co-Doped SnO2 Sensor for Hydrogen Peroxide Vapor Detection Using Impedance Spectroscopy
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide A hydrogen peroxide vapor (HPV) sensor based on SnO 2 doped with 1.3 at. % Co thin film has been fabricated using the high-frequency magnetron sputtering method. The thickness of the SnO 2 ⟨Co⟩ thin film was measured and the surface morphology was examined using the thickness measurement profilometer and scanning electron microscopy, respectively. The crystalline properties of the sensing material were revealed by transmission electron microscopy. The response, current–voltage, and impedance characteristics of the sensor were measured in the air and in the presence of various concentrations of HPV at 25–200 °C. An equivalent electrical circuit for the manufactured sensor structure was proposed, and the parameters of its constituent elements were determined. Furthermore, fitting frequency dependences of impedance were calculated. It was shown that charge transfer in the SnO 2 ⟨Co⟩ thin film was regulated by the processes mainly occurring at the grain boundaries of the gas-sensing film.
Source: ACS Omega
Institution: Yerevan State University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
Funder: State Committee of Science
Award: G7433054410
OpenAlex ID: W4409197873