Discrimination Improvement of a Gas Sensors’ Array Using High-Frequency Quartz Crystal Microbalance Coated with Polymeric Films
| العنوان: | Discrimination Improvement of a Gas Sensors’ Array Using High-Frequency Quartz Crystal Microbalance Coated with Polymeric Films |
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| المؤلفون: | S. Muñoz-Aguirre, Víctor Altuzar, C. Mendoza-Barrera, Marcos Rodríguez-Torres, Georgina Beltrán-Pérez, J. Castillo-Mixcóatl |
| المصدر: | Sensors, Vol 20, Iss 6972, p 6972 (2020) Sensors (Basel, Switzerland) |
| بيانات النشر: | MDPI AG, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Letter, Ethyl acetate, Analytical chemistry, 02 engineering and technology, polymeric sensing films, Methacrylate, partition coefficient, high sensitivity, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Analytical Chemistry, gas sensor, chemistry.chemical_compound, quartz crystal microbalance, Ethyl cellulose, Sensor array, volatile organic compounds, Relative humidity, lcsh:TP1-1185, Electrical and Electronic Engineering, Instrumentation, Heptane, 010401 analytical chemistry, Quartz crystal microbalance, high frequency, 021001 nanoscience & nanotechnology, discriminant analysis, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Partition coefficient, chemistry, 0210 nano-technology |
| الوصف: | The discrimination improvement of an array of four highly sensitive 30 MHz gas quartz crystal microbalance (QCM) sensors was performed and compared to a similar system based on a 12-MHz QCM. The sensing polymeric films were ethyl cellulose (EC), poly-methyl methacrylate (PMMA), Apiezon L (ApL), and Apiezon T (ApT) and they were coated over the AT-cut QCM devices by the drop casting technique. All the sensors had almost the same film thickness (0.2 μm). The fabricated QCM sensor arrays were exposed to three different concentrations, corresponding to 5, 10, and 15 μL, of ethanol, ethyl acetate, and heptane vapors. The steady state sensor responses were measured in a static system at a temperature of 20 °C and relative humidity of 22%. Our results showed that the 30-MHz sensors have a higher sensitivity than 12-MHz ones (around 5.73 times), independently of the sensing film and measured sample. On the other hand, principal component analysis and discriminant analysis were performed using the raw data of the responses. An improvement of the classification percentage between 12 MHz and 30 MHz sensors was found. However, it was not sufficient, especially for low concentrations. Furthermore, using partition coefficient and discriminant analysis (DA), an improvement of 100% classification of the three samples was achieved for the case of the 30-MHz sensor array. |
| اللغة: | English |
| تدمد: | 1424-8220 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c606a40c7eb64a9967d16b804e08d4f https://www.mdpi.com/1424-8220/20/23/6972 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....1c606a40c7eb64a9967d16b804e08d4f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14248220 |
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