2024-11-19 ワシントン州立大学(WSU)
＜関連情報＞
- https://news.wsu.edu/press-release/2024/11/19/new-ion-speed-record-holds-potential-for-faster-battery-charging-biosensing/
- https://onlinelibrary.wiley.com/doi/10.1002/adma.202406281
有機配位イオン・電子輸送の局所的化学的増強とゲーティング Local Chemical Enhancement and Gating of Organic Coordinated Ionic-Electronic Transport
Tamanna Khan, Terry McAfee, Thomas J. Ferron, Awwad Alotaibi, Brian A. Collins
Advanced Materials Published: 19 November 2024
DOI:https://doi.org/10.1002/adma.202406281
Abstract
Superior properties in organic mixed ionic-electronic conductors (OMIECs) over inorganic counterparts have inspired intense interest in biosensing, soft-robotics, neuromorphic computing, and smart medicine. However, slow ion transport relative to charge transport in these materials is a limiting factor. Here, it is demonstrated that hydrophilic molecules local to an interfacial OMIEC nanochannel can accelerate ion transport with ion mobilities surpassing electrophoretic transport by more than an order of magnitude. Furthermore, ion access to this interfacial channel can be gated through local surface energy. This mechanism is applied in a novel sensing device, which electronically detects and characterizes chemical reaction dynamics local to the buried channel. The ability to enhance ion transport at the nanoscale in OMIECs as well as govern ion transport through local chemical signaling enables new functionalities for printable, stretchable, and biocompatible mixed conduction devices.
