Number of the records: 1
Effective Surface Area of Electrochemical Sensors
- 1.
SYSNO ASEP 0431823 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effective Surface Area of Electrochemical Sensors Author(s) Krejčí, J. (CZ)
Sajdlová, Z. (CZ)
Neděla, Vilém (UPT-D) RID, ORCID, SAI
Flodrová, Eva (UPT-D) RID
Šejnohová, R. (CZ)
Vránová, H. (CZ)
Plička, R. (CZ)Number of authors 7 Source Title Journal of the Electrochemical Society. - : Electrochemical Society - ISSN 0013-4651
Roč. 161, č. 6 (2014), B147-B150Number of pages 4 s. Publication form Print - P Language eng - English Country US - United States Keywords scanning electron microscopy ; glassy-carbon electrode ; gold electrodes ; biosensors Subject RIV JB - Sensors, Measurment, Regulation R&D Projects FR-TI1/118 GA MPO - Ministry of Industry and Trade (MPO) Institutional support UPT-D - RVO:68081731 UT WOS 000339508600060 EID SCOPUS 84904816575 DOI 10.1149/2.091406jes Annotation The article compares the determination of an SPE (Screen Printed Electrodes) electrochemical active surface (AS) by the analysis of cyclic voltammogram in ferro-ferricyanide using Koutecky equation and by confocal and electron microscopy. SPE reliability is influenced by mass transport of analyte to active electrode surface while the physical properties of SPE are reproducible and stable. The electrode reaction involves the upper layer of SPE. The AS is the same as the geometrical area. Other methods set the active/geometrical area relation to 2,03 +/- 0,04 (gold working electrode) and 4,35 +/- 0,08 (platinum working electrode). It is demonstrated that nanostructures on working electrode surface can be efficient at high frequencies (> 10 kHz). The active area of SPE determined by scanning electron microscopy or optical measurement exhibits a standard deviation lower than 2%. It proves SPE be reliable and precise electrochemical device under optimal hydrodynamic conditions. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2015
Number of the records: 1