Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases
The breath gas analysis through gas phase chemical analysis draws attention in terms of non-invasive and real time monitoring. The array-type sensors are one of the diagnostic methods with high sensitivity and selectivity towards the target gases. Herein, we presented a 2 × 4 sensor array with a mic...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/5/1922 |
| _version_ | 1797541962505519104 |
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| author | Gwang Su Kim Yumin Park Joonchul Shin Young Geun Song Chong-Yun Kang |
| author_facet | Gwang Su Kim Yumin Park Joonchul Shin Young Geun Song Chong-Yun Kang |
| author_sort | Gwang Su Kim |
| collection | DOAJ |
| description | The breath gas analysis through gas phase chemical analysis draws attention in terms of non-invasive and real time monitoring. The array-type sensors are one of the diagnostic methods with high sensitivity and selectivity towards the target gases. Herein, we presented a 2 × 4 sensor array with a micro-heater and ceramic chip. The device is designed in a small size for portability, including the internal eight-channel sensor array. In<sub>2</sub>O<sub>3</sub> NRs and WO<sub>3</sub> NRs manufactured through the E-beam evaporator’s glancing angle method were used as sensing materials. Pt, Pd, and Au metal catalysts were decorated for each channel to enhance functionality. The sensor array was measured for the exhaled gas biomarkers CH<sub>3</sub>COCH<sub>3</sub>, NO<sub>2</sub>, and H<sub>2</sub>S to confirm the respiratory diagnostic performance. Through this operation, the theoretical detection limit was calculated as 1.48 ppb for CH<sub>3</sub>COCH<sub>3</sub>, 1.9 ppt for NO<sub>2</sub>, and 2.47 ppb for H<sub>2</sub>S. This excellent detection performance indicates that our sensor array detected the CH<sub>3</sub>COCH<sub>3</sub>, NO<sub>2</sub>, and H<sub>2</sub>S as biomarkers, applying to the breath gas analysis. Our results showed the high potential of the gas sensor array as a non-invasive diagnostic tool that enables real-time monitoring. |
| first_indexed | 2024-03-10T13:23:58Z |
| format | Article |
| id | doaj.art-2ff66432323b43238a8ef7e98dd6222e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T13:23:58Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-2ff66432323b43238a8ef7e98dd6222e2023-11-21T09:48:47ZengMDPI AGSensors1424-82202021-03-01215192210.3390/s21051922Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker GasesGwang Su Kim0Yumin Park1Joonchul Shin2Young Geun Song3Chong-Yun Kang4KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, KoreaKU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, KoreaElectronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, KoreaElectronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, KoreaKU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, KoreaThe breath gas analysis through gas phase chemical analysis draws attention in terms of non-invasive and real time monitoring. The array-type sensors are one of the diagnostic methods with high sensitivity and selectivity towards the target gases. Herein, we presented a 2 × 4 sensor array with a micro-heater and ceramic chip. The device is designed in a small size for portability, including the internal eight-channel sensor array. In<sub>2</sub>O<sub>3</sub> NRs and WO<sub>3</sub> NRs manufactured through the E-beam evaporator’s glancing angle method were used as sensing materials. Pt, Pd, and Au metal catalysts were decorated for each channel to enhance functionality. The sensor array was measured for the exhaled gas biomarkers CH<sub>3</sub>COCH<sub>3</sub>, NO<sub>2</sub>, and H<sub>2</sub>S to confirm the respiratory diagnostic performance. Through this operation, the theoretical detection limit was calculated as 1.48 ppb for CH<sub>3</sub>COCH<sub>3</sub>, 1.9 ppt for NO<sub>2</sub>, and 2.47 ppb for H<sub>2</sub>S. This excellent detection performance indicates that our sensor array detected the CH<sub>3</sub>COCH<sub>3</sub>, NO<sub>2</sub>, and H<sub>2</sub>S as biomarkers, applying to the breath gas analysis. Our results showed the high potential of the gas sensor array as a non-invasive diagnostic tool that enables real-time monitoring.https://www.mdpi.com/1424-8220/21/5/1922semiconducting gas sensorarraynanostructuremetal oxide |
| spellingShingle | Gwang Su Kim Yumin Park Joonchul Shin Young Geun Song Chong-Yun Kang Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases Sensors semiconducting gas sensor array nanostructure metal oxide |
| title | Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases |
| title_full | Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases |
| title_fullStr | Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases |
| title_full_unstemmed | Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases |
| title_short | Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases |
| title_sort | metal oxide nanorods based sensor array for selective detection of biomarker gases |
| topic | semiconducting gas sensor array nanostructure metal oxide |
| url | https://www.mdpi.com/1424-8220/21/5/1922 |
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