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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Scanning Bipolar Electrochemical Microscopy

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Author(s):
Essmann, Vera [1] ; Santos, Carla Santana [1, 2] ; Tarnev, Tsvetan [1] ; Bertotti, Mauro [2] ; Schuhmann, Wolfgang [1]
Total Authors: 5
Affiliation:
[1] Ruhr Univ Bochum, Analyt Chem Ctr Elect Sci CES, Univ Str 150, D-44780 Bochum - Germany
[2] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Av Prof Lineu Prestes, BR-74805513 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Analytical Chemistry; v. 90, n. 10, p. 6267-6274, MAY 15 2018.
Web of Science Citations: 6
Abstract

Electrochemical techniques offer high temporal resolution for studying the dynamics of electroactive species at samples of interest. To monitor fastest concentration changes, a micro- or nanoelectrode is accurately positioned in the vicinity of a sample surface. Using a microelectrode array, it is even possible to investigate several sites simultaneously and to obtain an instantaneous image of local dynamics. However, the spatial resolution is limited by the minimal electrode size required in order to contact the electrodes. To provide a remedy, we introduce the concept of scanning bipolar electrochemical microscopy and the corresponding experimental system. This technique allows precise positioning of a wireless scanning bipolar electrode to convert spatially heterogeneous concentrations of the analyte of interest into an electrochemiluminescence map of the sample reactivity. After elucidating the working principle by recording bipolar line and array scans, a bipolar electrode array is positioned at the site of interest to record an electrochemical image of the localized release of analyte molecules. (AU)

FAPESP's process: 17/12629-1 - Use of multi bipolar electrodes as sensors to monitor cell activity
Grantee:Carla Santana Santos
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 14/22396-6 - Development of a microsensor coupled to scanning electrochemical microscopy to investigate the role of mitochondria on the respiration process
Grantee:Carla Santana Santos
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)