A simulation-based analysis of optical read-out for electrochemical reactions using composite vortex beams.

ABSTRACT: We propose an optical read-out method for extracting faradaic current in electrochemical (EC) reactions and analyze its performance using opto-EC simulations. Our approach utilizes structured electrodes to generate composite optical vortex (COV) beams upon optical illumination. Through opto-EC simulations, we demonstrate that the EC reaction of 10 mM potassium ferricyanide induces a refractive index (RI) change, Δ RI, of approximately 10-4 RI units, leading to the rotation of the COV beam's intensity profile with a peak rotation of 40∘ . This rotation's magnitude is proportional to Δ RI, while the rate correlates with the faradaic current ( If ) density responsible for Δ RI. As the opto-EC information is from bulk Δ RI, it remains unaffected by interfering non-faradaic components at the in

SUBMITTER: Kumar N 

PROVIDER: S-EPMC11437161 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature