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High-Speed Electrochemical Imaging
journal contribution
posted on 2023-01-31, 02:54 authored by D Momotenko, J C Byers, K McKelvey, Minkyung KangMinkyung Kang, P R UnwinThe design, development, and application of high-speed scanning electrochemical probe microscopy is reported. The approach allows the acquisition of a series of high-resolution images (typically 1000 pixels μm-2) at rates approaching 4 seconds per frame, while collecting up to 8000 image pixels per second, about 1000 times faster than typical imaging speeds used up to now. The focus is on scanning electrochemical cell microscopy (SECCM), but the principles and practicalities are applicable to many electrochemical imaging methods. The versatility of the high-speed scan concept is demonstrated at a variety of substrates, including imaging the electroactivity of a patterned self-assembled monolayer on gold, visualization of chemical reactions occurring at single wall carbon nanotubes, and probing nanoscale electrocatalysts for water splitting. These studies provide movies of spatial variations of electrochemical fluxes as a function of potential and a platform for the further development of high speed scanning with other electrochemical imaging techniques.
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Journal
ACS NanoVolume
9Pagination
8942 - 8952Publisher DOI
ISSN
1936-0851eISSN
1936-086XPublication classification
C1.1 Refereed article in a scholarly journalUsage metrics
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Science & TechnologyPhysical SciencesTechnologyChemistry, MultidisciplinaryChemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryChemistryScience & Technology - Other TopicsMaterials Sciencehigh-speed scanningelectrochemical imagingscanning electrochemical cell microscopyself-assembled monolayercarbon nanotubenanoparticleelectrocatalysisSCANNING PROBE MICROSCOPYSECMTIPVISUALIZATIONNANOPARTICLESTOPOGRAPHYMONOLAYERSSURFACESDESIGN
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