Microsecond Resolved Infrared Spectroelectrochemistry Using Dual Frequency Comb IR Lasers
Date
4/1/2020
Authors
Burgess, Ian
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Publisher
American Chemical Society
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Type
Preprint
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Abstract
A dual infrared frequency comb spectrometer with heterodyne detection has been used to perform time resolved electrochemical attenuated total reflectance surface enhanced infrared absorption spectroscopy (ATR-SEIRAS). The measurement of the potential dependent desorption of a monolayer of a pyridine derivative (4-dimethylaminopyridine, DMAP) with time resolution as high as 4 μs was achieved without the use of step-scan interferometry. An analysis of the detection limit of the method as a function of both time resolution and measurement co-additions is provided and compared to step-scan experiments of an equivalent system. Dual frequency comb spectroscopy is shown to be highly amenable to time-resolved ATR-SEIRAS. Microsecond resolved spectra can be obtained with high spectral resolution and fractional monolayer detection limits in a total experimental duration that is two orders of magnitude less than the equivalent step-scan experiment.
Description
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Analytical Chemistry, copyright © American Chemical Society after peer review.
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Citation
Erick Lins, Stuart Read, Bipinlal Unni, Scott M. Rosendahl and Ian J. Burgess, (2020) Microsecond Resolved Infrared Spectroelectrochemistry Using Dual Frequency Comb IR Lasers. Analytical Chemistry. 92, 6241-6244
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Citation
Erick Lins, Stuart Read, Bipinlal Unni, Scott M. Rosendahl and Ian J. Burgess, (2020) Microsecond Resolved Infrared Spectroelectrochemistry Using Dual Frequency Comb IR Lasers. Analytical Chemistry. 92, 6241-6244
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DOI
10.1021/acs.analchem.0c00260