Robust and High Spatial Resolution Light Addressable Electrochemistry Using Hematite (?-Fe2O3) Photoanodes
By Seo, Daye; Lim, Sung Yul; Lee, Jihye; Yun, Jeongse; Chung, Taek Dong
Published in ACS Applied Materials & Interfaces
2018
Abstract
Light addressable/activated electrochemistry (LAE) has recently attracted attention as it can provide spatially resolved electrochemical information without using pre-patterned electrodes whose sizes and positions are unchangeable. Here, we propose hematite (?-Fe2O3) as the photoanode for LAE, which does not require any sort of surface modification for protection or facilitating charge transfer. As experimentally confirmed with various redox species, hematite is stable enough to be used for repetitive electroanalytical measurements. More importantly, it offers exceptionally high spatial resolution so that the