ArticleProceedings of the National Academy of Sciences of the United States of America2026
Optical voltammetry of redox processes inside a nanohole with opto-iontronic microscopy.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cyclic Voltammetry (CV) is the most commonly used method in electrochemistry to characterize electrochemical reactions, usually involving macroscopic electrodes. Here, we demonstrate an optical CV technique called opto-iontronic Microscopy, which is capable of monitoring electrochemical processes at the nanoscale. By integrating optical microscopy with nanohole electrodes, we enhance sensitivity in detecting redox reactions within volumes as small as an attoliter [[Formula: see text]]. This technique uses electric-double-layer modulation and lock-in detection to sensitively probe ion dynamics during cyclic voltammetry in nanoholes that are under total internal reflection illumination. We applied this method to study electric double layer (dis)charging coupled to ferrocenedimethanol [Fc(MeOH)
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