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Herein, a chemiresistive sensor that can detect ppb-level formaldehyde in an exclusive manner at room temperature is designed. The TiO\n                    <jats:sub>2<\/jats:sub>\n                    sensor exhibits under UV illumination highly selective detection of formaldehyde and ethanol with negligible cross-responses to other indoor pollutants. The coating of a mixed matrix membrane (MMM) composed of zeolitic imidazole framework (ZIF-7) nanoparticles and polymers on TiO\n                    <jats:sub>2<\/jats:sub>\n                    sensing films removed ethanol interference completely by molecular sieving, enabling an ultrahigh selectivity (response ratio &gt; 50) and response (resistance ratio &gt; 1,100) to 5 ppm formaldehyde at room temperature. Furthermore, a monolithic and flexible sensor is fabricated successfully using a TiO\n                    <jats:sub>2<\/jats:sub>\n                    film sandwiched between a flexible polyethylene terephthalate substrate and MMM overlayer. Our work provides a strategy to achieve exclusive selectivity and high response to formaldehyde, demonstrating the promising potential of flexible gas sensors for indoor air monitoring.\n                  <\/jats:p>","DOI":"10.1038\/s41467-021-25290-3","type":"journal-article","created":{"date-parts":[[2021,8,16]],"date-time":"2021-08-16T06:03:52Z","timestamp":1629093832000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":216,"title":["Exclusive and ultrasensitive detection of formaldehyde at room temperature using a flexible and monolithic chemiresistive sensor"],"prefix":"10.1038","volume":"12","author":[{"given":"Yong Kun","family":"Jo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seong-Yong","family":"Jeong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Young Kook","family":"Moon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Young-Moo","family":"Jo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ji-Wook","family":"Yoon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3075-3623","authenticated-orcid":false,"given":"Jong-Heun","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,8,16]]},"reference":[{"key":"25290_CR1","doi-asserted-by":"publisher","first-page":"2002075","DOI":"10.1002\/adma.202002075","volume":"32","author":"S-Y Jeong","year":"2020","unstructured":"Jeong, S.-Y., Kim, J.-S. & Lee, J.-H. 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