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The potential of molecular and polymeric architectures in the nanochannels to further enhance and modulate these behaviors, however, remains underexplored. In this work, we explore the integration of spiropyran\u2010based polymers into anodic aluminum oxide (AAO) nanochannels, resulting in tailored photoresponsive behaviors. Spiropyran undergoes reversible ring\u2010opening isomerization upon UV irradiation, which leads to changes in the packing and polarity of polymer chains within the nanochannels. The polySp\u2010coated and polySp\u2010grafted AAO systems, fabricated via solution wetting and surface\u2010initiated atom transfer radical polymerization (SI\u2010ATRP), exhibit unique macroscopic and microscopic responses, including reversible color changes, wettability adjustments, and modulation of ion transport under UV and visible light. These findings demonstrate the potential of spiropyran\u2010functionalized nanochannels for applications in optical information storage, photogated materials, and sensors. By manipulating molecular architecture and nanoconfinement, this work paves the way for the design of next\u2010generation photoswitchable systems with enhanced multifunctionality.<\/jats:p>","DOI":"10.1002\/asia.202401684","type":"journal-article","created":{"date-parts":[[2025,2,19]],"date-time":"2025-02-19T22:15:16Z","timestamp":1740003316000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Tailoring Polymer Coatings and Grafting Structures for Photoswitchable Ionic Transport in Solid\u2010State Nanochannels"],"prefix":"10.1002","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-0976-0802","authenticated-orcid":false,"given":"Yi\u2010Fan","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Applied Chemistry National Yang Ming Chiao Tung University  300093 Hsinchu 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