材料科学
光热治疗
膜
光热效应
离子键合
等离子体子
纳米纤维
纳米技术
电解质
离子通道
离子
化学工程
光电子学
化学
电极
有机化学
受体
物理化学
工程类
生物化学
作者
Jeonghee Yeom,Ayoung Choe,Jiyun Lee,Jeeyoon Kim,Jin‐Young Kim,Seung Hak Oh,Cheolhong Park,Sangyun Na,Young‐Eun Shin,Youngoh Lee,Yun Goo Ro,Sang Kyu Kwak,Hyunhyub Ko
标识
DOI:10.1038/s41467-023-36039-5
摘要
Ion channels transduce external stimuli into ion-transport-mediated signaling, which has received considerable attention in diverse fields such as sensors, energy harvesting devices, and desalination membrane. In this work, we present a photosensitive ion channel based on plasmonic gold nanostars (AuNSs) and cellulose nanofibers (CNFs) embedded in layered MXene nanosheets. The MXene/AuNS/CNF (MAC) membrane provides subnanometer-sized ionic pathways for light-sensitive cationic flow. When the MAC nanochannel is exposed to NIR light, a photothermal gradient is formed, which induces directional photothermo-osmotic flow of nanoconfined electrolyte against the thermal gradient and produces a net ionic current. MAC membrane exhibits enhanced photothermal current compared with pristine MXene, which is attributed to the combined photothermal effects of plasmonic AuNSs and MXene and the widened interspacing of the MAC composite via the hydrophilic nanofibrils. The MAC composite membranes are envisioned to be applied in flexible ionic channels with ionogels and light-controlled ionic circuits.
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