Carbon nanowall-based gas sensors for carbon dioxide gas detection
Zhumadilov R.Y. Yerlanuly Y. Parkhomenko H.P. Soltabayev B. Orazbayev S.A. Bakenov Z. Ramazanov T.S. Gabdullin M.T. Jumabekov A.N.
15 April 2024Institute of Physics
Nanotechnology
2024#35Issue 16
Carbon nanowalls (CNWs) have attracted significant attention for gas sensing applications due to their exceptional material properties such as large specific surface area, electric conductivity, nano- and/or micro-porous structure, and high charge carrier mobility. In this work, CNW films were synthesized and used to fabricate gas sensors for carbon dioxide (CO2) gas sensing. The CNW films were synthesized using an inductively-coupled plasma (ICP) plasma-enhanced chemical vapor deposition (PECVD) method and their structural and morphological properties were characterized using Raman spectroscopy and electron microscopy. The obtained CNW films were used to fabricate gas sensors employing interdigitated gold (Au) microelectrodes. The gas sensors were fabricated using both direct synthesis of CNW films on interdigitated Au microelectrodes on quartz and also transferring presynthesized CNW films onto interdigitated Au microelectrodes on glass. The CO2 gas-sensing properties of fabricated devices were investigated for different concentrations of CO2 gas and temperature-ranges. The sensitivities of fabricated devices were found to have a linear dependence on the concentration of CO2 gas and increase with temperature. It was revealed that devices, in which CNW films have a maze-like structure, perform better compared to the ones that have a petal-like structure. A sensitivity value of 1.18% was obtained at 500 ppm CO2 concentration and 100 °C device temperature. The CNW-based gas sensors have the potential for the development of easy-to-manufacture and efficient gas sensors for toxic gas monitoring.
carbon dioxide , carbon nanowalls , CO2 detection , gas sensors , ICP-PECVD
Text of the article Перейти на текст статьи
Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana, 010000, Kazakhstan
Institute of Applied Science and Information Technologies, Almaty, 050038, Kazakhstan
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
National Laboratory, Astana, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
Al-Farabi Kazakh National University
Department of Physics
Institute of Applied Science and Information Technologies
Kazakh-British Technical University
National Laboratory
Department of Chemical and Materials Engineering
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026