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Highly Selective Dimethylamine Sensing Performance of TiO2 Thin Films at Room Temperature

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To date, reports on metal oxide semiconductors for selective detection of dimethylamine (DMA) is in scarce. Hence in our study, we report titanium oxide (TiO2) as a promising candidate for tuned selectivity towards DMA. Highly uniform TiO2 thin films were successfully deposited on glass substrates using reactive dc magnetron sputtering at various substrate temperatures. Polycrystalline nature of rutile TiO2 was confirmed by X-ray diffraction technique (XRD). The uniform surface morphology of the sputtered TiO2 thin films was revealed by Field Emission Scanning Electron Microscopy (FESEM). An upsurge in optical band gap from 3.18 to 3.4 eV was observed with increase in substrate temperature. The sensing studies of the sputtered TiO2 thin films exhibited a significant sensor response towards the lower concentration of DMA at ambient temperature. It is deemed that this work will provide an insight to develop DMA sensors based on TiO2 thin films.
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Keywords: DMA; Sensing; Sputtering; Substrate Temperature; TiO2

Document Type: Research Article

Affiliations: Functional Nanomaterials & Devices Lab, Centre for Nanotechnology & Advanced Biomaterials and School of Electrical & Electronics Engineering, SASTRA Deemed to be University, Thanjavur 613401, India

Publication date: May 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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