Synthesis of nanostructured cubic phase SnO2 thin film and its trace-level sensing of CO gas
Sharma K.K. Sharma D. Boukhvalov D.W. Khandelwal U. Nukala P. Bhat N. Karuppannan R.
December 2026Nature Research
Nature Communications
2026#17Issue 1
In this study, we report the fabrication of a cubic phase SnO2-based thin film gas sensor with excellent sensitivity and selectivity for carbon monoxide (CO) gas at room temperature, with a high response of 25606% achieved at 2 ppm CO gas concentration, and a detection limit down to 1 ppb. Cubic phase SnO2 thin films are synthesized using a simple sol-gel process, followed by spin coating. Our synthesis technique allows for stabilizing the cubic phase of SnO2, confirmed through XRD and TEM studies, which is otherwise reported at high pressures and temperatures. Further, our DFT simulations show that the cubic phase of SnO2 nanoparticles has a lower energy barrier for CO adsorption and desorption than the more common tetragonal phase. The low-voltage and ambient operating conditions of the sensor reported in this study make it highly practical for widespread use, thus offering a promising solution to the growing need for efficient and affordable gas sensing applications, including environmental monitoring, industrial safety, and medical diagnosis.
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Department of Physics, Indian Institute of Science, Karnataka, Bangalore, India
Centre for Nano Science and Engineering, Indian Institute of Science, Karnataka, Bangalore, India
College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing, China
Institute of Physics and Technology, Satbayev University, Ibragimov str. 11, Almaty, Kazakhstan
Department of Physics
Centre for Nano Science and Engineering
College of Science
Institute of Physics and Technology
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026