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Air Gap Microcell for Scanning Electrochemical Microscopic Imaging of Carbon Dioxide Output. Model Calculation and Gas Phase SECM Measurements for Estimation of Carbon Dioxide Producing Activity of Microbial Sources
Author(s) -
Kiss András,
Kiss Laszló,
Kovács Barna,
Nagy Géza
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100180
Subject(s) - carbon dioxide , potentiometric titration , materials science , wafer , scanning electrochemical microscopy , gas phase , analytical chemistry (journal) , membrane , microcell , phase (matter) , chemistry , electrode , electrochemistry , chromatography , nanotechnology , biochemistry , organic chemistry , computer science , operating system
Most of SECM studies have been carried out in liquid or gel phases. A Severinghaus type, CO 2 detecting potentiometric tip has been fabricated and used in gas phase SECM studies. The microcell tip is made without gas permeable membrane. Faster response, needed in SECM, was achieved by substituting the membrane with an air gap. The carbon dioxide concentration profile in the gas phase over a disc‐shaped colony of yeast has been detected with the new tip. Estimation of the carbon dioxide output of the fungi colony was attempted by fitting simulated curves to measured ones obtained with one dimensional (line) scans.