{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T09:44:41Z","timestamp":1770889481921,"version":"3.50.1"},"reference-count":37,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,3,9]],"date-time":"2021-03-09T00:00:00Z","timestamp":1615248000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003693","name":"Korea Institute of Science and Technology","doi-asserted-by":"publisher","award":["2E30410"],"award-info":[{"award-number":["2E30410"]}],"id":[{"id":"10.13039\/501100003693","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100014188","name":"Ministry of Science and ICT, South Korea","doi-asserted-by":"publisher","award":["NRF-2020M3H4A3105594"],"award-info":[{"award-number":["NRF-2020M3H4A3105594"]}],"id":[{"id":"10.13039\/501100014188","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003052","name":"Ministry of Trade, Industry and Energy","doi-asserted-by":"publisher","award":["2018201010636A"],"award-info":[{"award-number":["2018201010636A"]}],"id":[{"id":"10.13039\/501100003052","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008783","name":"National Research Council of Science and Technology","doi-asserted-by":"publisher","award":["CAP-17-04-KRISS"],"award-info":[{"award-number":["CAP-17-04-KRISS"]}],"id":[{"id":"10.13039\/501100008783","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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 \u00d7 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. In2O3 NRs and WO3 NRs manufactured through the E-beam evaporator\u2019s 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 CH3COCH3, NO2, and H2S to confirm the respiratory diagnostic performance. Through this operation, the theoretical detection limit was calculated as 1.48 ppb for CH3COCH3, 1.9 ppt for NO2, and 2.47 ppb for H2S. This excellent detection performance indicates that our sensor array detected the CH3COCH3, NO2, and H2S 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.<\/jats:p>","DOI":"10.3390\/s21051922","type":"journal-article","created":{"date-parts":[[2021,3,9]],"date-time":"2021-03-09T12:08:01Z","timestamp":1615291681000},"page":"1922","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases"],"prefix":"10.3390","volume":"21","author":[{"given":"Gwang Su","family":"Kim","sequence":"first","affiliation":[{"name":"KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea"},{"name":"Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, Korea"}]},{"given":"Yumin","family":"Park","sequence":"additional","affiliation":[{"name":"KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea"},{"name":"Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, Korea"}]},{"given":"Joonchul","family":"Shin","sequence":"additional","affiliation":[{"name":"Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, Korea"}]},{"given":"Young Geun","family":"Song","sequence":"additional","affiliation":[{"name":"Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, Korea"}]},{"given":"Chong-Yun","family":"Kang","sequence":"additional","affiliation":[{"name":"KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea"},{"name":"Electronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02791, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/JTEHM.2015.2400919","article-title":"Current and future challenges in point-of-care technologies: A paradigm-shift in affordable global healthcare with personalized and preventive medicine","volume":"3","author":"Dhawan","year":"2015","journal-title":"IEEE J. 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