Spectroelectrochemistry Using Optically Transparent Electrodes – Ted Kuwana and the Early Years

Heineman, William R.; Winograd, Nicholas; Jensen, William B.

doi:10.1002/elan.202100493

Cited by 4 publications

(4 citation statements)

References 53 publications

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“…To make the WE optically transparent or semitransparent, platinum or gold thin wires and meshes, or glass slides coated with EC-active transparent conductive oxides (TCOs), such as indium tin oxide (ITO), are often used. TCOs offer lower than their metallic counterparts attenuation of light passing through the analyte and electrode’s surface 10 , 14 .…”

Section: Introductionmentioning

confidence: 99%

“…Among the most common analytical methods are electrochemical (EC) and optical, where electric charge transfer and emitted radiant energy or absorption are measured, respectively 3 . To gather enhanced data sets, these two measurements, i.e., optical and EC, are conducted simultaneously creating an approach called spectroelectrochemistry (SEC) [6][7][8][9][10] . In contrast to separate optical and EC analysis, besides the cross-correlation of the obtained information, SEC collects real-time information on the reactants, in situ electrogenerated intermediates, and/or reaction products involved in electron transfer processes 11 .…”

mentioning

confidence: 99%

“…www.nature.com/scientificreports/ tin oxide (ITO), are often used. TCOs offer lower than their metallic counterparts attenuation of light passing through the analyte and electrode's surface 10,14 . Over the past decades various approaches for the light-analyte interactions in a volume were proposed 6,15 .…”

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confidence: 99%

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Enhanced spectroelectrochemistry with lossy-mode resonance optical fiber sensor

Janik,

Lechowicz,

Pituła

et al. 2023

Sci Rep

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Spectroelectrochemical (SEC) measurements play a crucial role in analytical chemistry, utilizing transparent or semitransparent electrodes for optical analysis of electrochemical (EC) processes. The EC readout provides information about the electrode's state, while changes in the transmitted optical spectrum help identify the products of EC reactions. To enhance SEC measurements, this study proposes the addition of optical monitoring of the electrode. The setup involves using a polymer-clad silica multimode fiber core coated with indium tin oxide (ITO), which serves as both the electrode and an optical fiber sensor. The ITO film is specifically tailored to exhibit the lossy-mode resonance (LMR) phenomenon, allowing for simultaneous optical monitoring alongside EC readouts. The LMR response depends on the properties of the ITO and the surrounding medium's optical properties. As a result, the setup offers three types of interrogation readouts: EC measurements, optical spectrum analysis corresponding to the volume of the analyte (similar to standard SEC), and LMR spectrum analysis reflecting the state of the sensor/electrode surface. In each interrogation path, cyclic voltammetry (CV) experiments were conducted individually with two oxidation–reduction reaction (redox) probes: potassium ferricyanide and methylene blue. Subsequently, simultaneous measurements were performed during chronoamperometry (CA) with the sensor, and the cross-correlation between the readouts was examined. Overall, this study presents a novel and enhanced SEC measurement approach that incorporates optical monitoring of the electrode. It provides a comprehensive understanding of EC processes and enables greater insights into the characteristics of the analyte.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Enhanced spectroelectrochemistry with lossy-mode resonance optical fiber sensor

Janik,

Lechowicz,

Pituła

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Since the coupling of spectroscopy and electrochemistry (hereafter spectroelectrochemistry (SEC)) can provide a detailed and comprehensive study of the electron transfer kinetics and analytes’ structural information during the electrochemical process. SEC is attracting intensive interest for various research in analytical fields, ranging from biology [ 1 ] to chemistry [ 2 ], material engineering [ 3 , 4 ], and others [ 5 ]. The schematic diagrams of the SEC technique are shown in Figure 1 a. Electrochemical techniques, such as cyclic voltammetry (CV), differential pulse voltammetry (DPV), or electrochemical impedance spectroscopy (EIS), have been employed in SEC techniques [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Recent State and Challenges in Spectroelectrochemistry with Its Applications in Microfluidics

Chande

Cheng

et al. 2023

Micromachines

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This review paper presents the recent developments in spectroelectrochemical (SEC) technologies. The coupling of spectroscopy and electrochemistry enables SEC to do a detailed and comprehensive study of the electron transfer kinetics and vibrational spectroscopic fingerprint of analytes during electrochemical reactions. Though SEC is a promising technique, the usage of SEC techniques is still limited. Therefore, enough publicity for SEC is required, considering the promising potential in the analysis fields. Unlike previously published review papers primarily focused on the relatively frequently used SEC techniques (ultraviolet-visible SEC and surface-enhanced Raman spectroscopy SEC), the two not-frequently used but promising techniques (nuclear magnetic resonance SEC and dark-field microscopy SEC) have also been studied in detail. This review paper not only focuses on the applications of each SEC method but also details their primary working mechanism. In short, this paper summarizes each SEC technique’s working principles, current applications, challenges encountered, and future development directions. In addition, each SEC technique’s applicative research directions are detailed and compared in this review work. Furthermore, integrating SEC techniques into microfluidics is becoming a trend in minimized analysis devices. Therefore, the usage of SEC techniques in microfluidics is discussed.

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Teaching of electroanalytical chemistry and its impact on the position of electroanalytical methods in practical laboratories

Barek,

Šmejkal

2023

J Solid State Electrochem

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Spectroelectrochemistry Using Optically Transparent Electrodes – Ted Kuwana and the Early Years

Cited by 4 publications

References 53 publications

Enhanced spectroelectrochemistry with lossy-mode resonance optical fiber sensor

Enhanced spectroelectrochemistry with lossy-mode resonance optical fiber sensor

Recent State and Challenges in Spectroelectrochemistry with Its Applications in Microfluidics

Teaching of electroanalytical chemistry and its impact on the position of electroanalytical methods in practical laboratories

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