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Among gas sensors, metal oxide\u2010based biomedical gas sensors have received remarkable attention owing to their unique properties, such as high sensitivity, simple fabrication, miniaturization, portability and real\u2010time monitoring. Herein, we reviewed the recent advances in chemoresistive metal oxide\u2010based gas sensors with ZnO, SnO<jats:sub>2<\/jats:sub> and In<jats:sub>2<\/jats:sub>O<jats:sub>3<\/jats:sub> as sensing materials for monitoring a range of exhaled breath markers (i.e., NO, H<jats:sub>2<\/jats:sub>, H<jats:sub>2<\/jats:sub>S, acetone, isoprene and formaldehyde). We focused on the strategies that improve the sensitivity and selectivity of metal oxide\u2010based gas sensors. The challenges to fabricate a functional gas sensor with high sensing performance along with suggestions are outlined.<\/jats:p>","DOI":"10.1002\/mds3.10161","type":"journal-article","created":{"date-parts":[[2020,12,14]],"date-time":"2020-12-14T12:48:12Z","timestamp":1607950092000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":72,"title":["Metal oxide\u2010based gas sensors for the detection of exhaled breath markers"],"prefix":"10.1002","volume":"4","author":[{"given":"Fereshteh","family":"Vajhadin","sequence":"first","affiliation":[{"name":"Department of Chemistry Faculty of Science Yazd University Yazd Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Mazloum\u2010Ardakani","sequence":"additional","affiliation":[{"name":"Department of Chemistry Faculty of Science Yazd University Yazd Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abbas","family":"Amini","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering Australian College of Kuwait Safat Kuwait"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,3,29]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/ctg.2015.40"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.3390\/s20113096"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.200510-1659PP"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1183\/09031936.00048506"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1183\/09031936.04.00125304"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1183\/13993003.00544-2019"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.7b05241"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pupt.2010.05.001"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.snb.2017.08.057"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1109\/LSENS.2017.2740222"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.snb.2016.11.137"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1088\/0957-4484\/20\/46\/465603"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1586\/17476348.2014.856267"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0925-4005(99)00097-0"},{"key":"e_1_2_7_16_1","first-page":"128","article-title":"Acetone in breath and blood","volume":"88","author":"Crofford O. 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