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In this study, a letterpress\u2010inspired, one\u2010step transfer\u2010printing strategy integrated with pattern\u2010recognition analysis is proposed to implement multiplexed chemical sensor arrays based on graphene field\u2010effect transistors (GFETs). By tuning interfacial adhesion between functional materials and a polymer stamp, accurate and area\u2010selective functionalization with sub\u201010\u00a0\u00b5m feature sizes is achieved, thereby enabling simultaneous multifunctionalization of graphene. The resulting 3 \u00d7 3 GFET sensor arrays, comprising both functionalized and pristine channels, generate distinct sensing response patterns to representative volatile organic compounds, including chlorobenzene, toluene, and methanol, at a fixed tested concentration, driven by molecule\u2010specific charge\u2010transfer interactions at the functional layer. An artificial neural network trained on sensor\u2010derived patterns is further demonstrated with an increased number of sensors, delivering highly accurate classification results. This strategy highlights a versatile and scalable platform that combines lithography\u2010free, low\u2010cost transfer printing with intelligent analysis, offering a practical route toward next\u2010generation chemical\u2010sensing systems based on functionalized 2D materials.<\/jats:p>","DOI":"10.1002\/smll.75781","type":"journal-article","created":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T11:01:17Z","timestamp":1789556477000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["High\u2010Precision Multiplex Chemical Sensors with Pattern\u2010Recognition Capability via a Letter Printing\u2010Inspired Transfer Method"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7488-4521","authenticated-orcid":false,"given":"Yoon Ho","family":"Lee","sequence":"first","affiliation":[{"name":"School of Chemical and Biological Engineering Institute of Chemical Processes Seoul National University  Seoul 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