{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T16:38:35Z","timestamp":1785343115043,"version":"3.55.0"},"reference-count":47,"publisher":"Wiley","issue":"44","license":[{"start":{"date-parts":[[2025,9,18]],"date-time":"2025-09-18T00:00:00Z","timestamp":1758153600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The advancement of highly selective and sensitive gas sensors is essential for various fields, and MXene has emerged as a strong candidate for chemiresistive gas sensing due to its high electrical conductivity, tunable surface chemistry, and ability to operate at room temperature. This study demonstrates a versatile strategy for covalently functionalizing Ti\n                    <jats:sub>3<\/jats:sub>\n                    C\n                    <jats:sub>2<\/jats:sub>\n                    T\n                    <jats:italic>\n                      <jats:sub>x<\/jats:sub>\n                    <\/jats:italic>\n                    MXenes using diazonium salts with diverse tail groups, enabling tunable gas selectivity. By systematically modulating surface energy through the grafting of hydrophilic (sulfanilic acid diazonium) and hydrophobic (4\u2010octylaniline diazonium and 4\u2010(heptadecafluorooctyl)aniline diazonium) tail groups, MXene surfaces are tuned to interact strongly with specific target gases. Using this strategy, this work achieves distinct gas response patterns and cross\u2010reactivity toward other gases is minimized, while density functional theory calculations revealed enhanced gas adsorption energies due to ligand\u2010specific interactions. Functionalized MXenes via diazotization chemistry exhibits high selectivity toward either ammonia, acetone, or ethanol while exhibiting a large enhancement in gas sensitivity compared to pristine MXene. This ligand\u2010tailored functionalization strategy enables precise tuning of gas selectivity by controlling the tail group structure and ligand grafting density, providing a versatile platform for developing advanced MXene\u2010based multi\u2010target gas sensors.\n                  <\/jats:p>","DOI":"10.1002\/smll.202508501","type":"journal-article","created":{"date-parts":[[2025,9,18]],"date-time":"2025-09-18T12:59:12Z","timestamp":1758200352000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Tail\u2010Group Modulated Covalent Functionalization of Solvent\u2010Dispersible MXenes for Selectivity\u2010Tunable Gas Sensing at Room Temperature"],"prefix":"10.1002","volume":"21","author":[{"given":"Seongeun","family":"Lee","sequence":"first","affiliation":[{"name":"Extreme Materials Research Center Korea Institute of Science and Technology  Seoul 02792 South Korea"},{"name":"Department of Materials Science and Engineering Korea University  Seoul 02841 South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tae Yun","family":"Ko","sequence":"additional","affiliation":[{"name":"Convergence Research Center for Solutions to Electromagnetic Interference in Future\u2010mobility Korea Institute of Science and Technology  Seoul 02792 South Korea"},{"name":"Nanoplexus Solutions Ltd Graphene Engineering Innovation Centre, Masdar Building  Sackville Street Manchester M1 3BB UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ajit K.","family":"Jena","sequence":"additional","affiliation":[{"name":"Indo\u2010Korea Science and Technology Center Korea Institute of Science and Technology  Jakkur, Bengaluru 560065 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hohyung","family":"Kang","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology  291, Daehak\u2010ro, Yuseong\u2010gu Daejeon 34141 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junyeol","family":"Jeon","sequence":"additional","affiliation":[{"name":"Extreme Materials Research Center Korea Institute of Science and Technology  Seoul 02792 South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Woosuk","family":"Yang","sequence":"additional","affiliation":[{"name":"Extreme Materials Research Center Korea Institute of Science and Technology  Seoul 02792 South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seok Hyeon","family":"Kim","sequence":"additional","affiliation":[{"name":"Extreme Materials Research Center Korea Institute of Science and Technology  Seoul 02792 South Korea"},{"name":"Department of Materials Science and Engineering Korea University  Seoul 02841 South 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