High Sensitive and Selective Minisensor for Acetone Monitoring
| Autor: | Kaveh Moulaee, M. Parvis, Luca Lombardo, Giovanni Neri, Alessio Gullino, Sabrina Grassini, Nicola Donato |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
plasma material processing Analytical chemistry chemistry.chemical_element 02 engineering and technology Substrate (electronics) niobium compounds chemistry.chemical_compound X-ray photoelectron spectroscopy 0202 electrical engineering electronic engineering information engineering Acetone nanostructured materials Sensitivity (control systems) Electrical and Electronic Engineering Instrumentation thin film sensors gas detectors 020208 electrical & electronic engineering Parts-per notation chemical sensors biosensors chemistry Biochemical analysis Selectivity Platinum Layer (electronics) |
| Zdroj: | IEEE Transactions on Instrumentation and Measurement. 69:3308-3316 |
| ISSN: | 1557-9662 0018-9456 |
| Popis: | This article describes a simple though extremely effective sensor for acetone monitoring in the breath. The sensor is capable of monitoring the presence of acetone at parts per million (ppm) concentrations, thus being suitable for a diabetes diagnosis. It has a dimension of $3 {\,\,\mathrm {mm}} \times 6 {\,\,\mathrm {mm}}$ and a cost of less than one dollar. The small dimensions allow one to greatly limit the power required to increase its temperature, and its high selectivity with respect to other gases present in the breath reduces the risk of false-positive responses. The sensor is based on a thin alumina substrate on which platinum strips are deposited on both faces. A thin Nb2O5 layer with a nanometric thickness provides the required sensitivity and selectivity. Sensor prototypes have been characterized by field emission scanning electron microscopy (FESEM) and X-ray photoelectron spectroscopy (XPS) and proved an inherent linear response up to a few ppm of acetone. |
| Databáze: | OpenAIRE |
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