Scanning electrochemical microscopy in the 21st century

Sun, Peng; Laforge, François O.; Mirkin, Michael V.

doi:10.1039/b612259k

Cited by 282 publications

(257 citation statements)

References 188 publications

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“…[9][10][11][12] The introduction of ultramicroelectrode (UME) techniques from the 1980's onwards has offered many advantages including reduced ohmic effects, fast response times and high mass transport rates under both steady-state and transient conditions. 13,14 Hydrodynamic UMEs 10,11,15,16 and, particularly, the development of scanning electrochemical microscopy (SECM) 9,12,17,18 provide even higher mass transport rates under steady-state conditions.…”

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confidence: 99%

Impact of Adsorption on Scanning Electrochemical Microscopy Voltammetry and Implications for Nanogap Measurements

et al. 2016

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Impact of Adsorption on Scanning Electrochemical Microscopy Voltammetry and Implications for Nanogap Measurements

et al. 2016

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“…14 Additionally, SECM can be applied to study samples that are challenging for optical microscopy such as multicolored surfaces and porous materials. The major advantage of SECM is its ability to probe local surface reactivity with lateral resolution and high sensitivity.…”

Section: Andreas Lesch and Gunther Wittstockmentioning

confidence: 99%

Seeing Big with Scanning Electrochemical Microscopy

et al. 2011

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Specialized microelectrode probes fabricated in a soft polymer film now make it possible to use scanning electrochemical microscopy (SECM) to image the reactivity of large, corrugated, tilted, and dry surfaces. In their article Fernando Cortés-Salazar, Dmitry Momotenko, and Hubert H. Girault discuss the features and applications of the technique. The image shows a fountain pen probe for dry surface imaging and an array of microelectrodes for imaging large surfaces.

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“…12,13 In terms of flux measurements, scanning electrochemical microscopy (SECM) is particularly suited to detect a wide range of redox-active species with high spatial and temporal resolution. [14][15][16][17][18] A small electrode (tip) is immersed in solution close to a sample and the current response at the electrode, arising from electrochemical processes taking place at the electrode, is recorded. A diagram of a typical SECM tip investigating a redox process (Fe(CN) 6 4-/3-) at a surface is shown in Figure 1 B.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Local Photosynthetic Flux Measurements at Isolated Chloroplasts and Thylakoid Membranes Using Scanning Electrochemical Microscopy (SECM)

et al. 2013

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Quantitative local photosynthetic flux measurements at isolated chloroplasts and thylakoid membranes using scanning electrochemical microscopy (SECM). Copies of full items can be used for personal research or study, educational, or not-forprofit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher's statement:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Part B, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jp403048fThe version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. (CN) 6 4-), from the artificial electron acceptor ferricyanide (Fe(CN) 6 3-), using a stationary ultramicroelectrode at chloroplasts and thylakoid membranes (sourced from chloroplasts). Oxygen generation at films of chloroplasts and thylakoid membranes was detected directly during photosynthesis, but in the case of thylakoid membranes this switched to sustained oxygen consumption at longer illumination times. An initial oxygen concentration spike was detected over both chloroplast and thylakoid membrane films, and the kinetics of the oxygen generation were extracted by fitting the experimental data to a finite element method (FEM) simulation. In contrast to previous work, the oxygen generation spike was attributed to the limited size of the plastoquinone pool, a key component in the linear electron transport pathway and a contributing factor in photoinhibition. Finally, the mobile nature of the SECM probe, and its high spatial resolution, also allowed us to detect ferrocyanide produced from a single thylakoid membrane. These results further demonstrate the power of SECM for localized flux measurements in biological processes, in this case photosynthesis, and, that the high time resolution, combined with FEM simulations, allows the elucidation of quantitative kinetic information.

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Scanning electrochemical microscopy in the 21st century

Cited by 282 publications

References 188 publications

Impact of Adsorption on Scanning Electrochemical Microscopy Voltammetry and Implications for Nanogap Measurements

Impact of Adsorption on Scanning Electrochemical Microscopy Voltammetry and Implications for Nanogap Measurements

Seeing Big with Scanning Electrochemical Microscopy

Quantitative Local Photosynthetic Flux Measurements at Isolated Chloroplasts and Thylakoid Membranes Using Scanning Electrochemical Microscopy (SECM)

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