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A Microbial Sensor Based on Direct Electron Transfer at Shewanella Sp. Drop‐Coated Screen‐Printed Carbon Electrodes
Author(s) -
Sudhakara Prasad Kariate,
Arun A. B.,
Rekha P. D.,
Young ChiuChung,
Chang JenLin,
Zen JyhMyng
Publication year - 2009
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.200904605
Subject(s) - electron transfer , electrode , drop (telecommunication) , hydrogen peroxide , adsorption , electrochemistry , materials science , redox , nitrite , chemical engineering , chemistry , shewanella oneidensis , nanotechnology , inorganic chemistry , bacteria , photochemistry , organic chemistry , telecommunications , biology , computer science , nitrate , engineering , genetics
Aerobically grown Shewanella sp. bacterial suspension drop‐coated on a disposable screen‐printed carbon electrode was found to possess electroactivity without the aid of redox mediator. Cyclic voltammetric studies revealed the characteristics of a mixed diffusion adsorption‐controlled electrochemical process for direct electron transfer at the bacteria‐modified electrode. Both FE‐SEM and ATR FT‐IR experiments were carried out to investigate the surface characteristics. The electroanalytical applicability was further demonstrated for electrocatalytic reduction of arsenite, hydrogen peroxide and nitrite. Low cost and very simple manufacturing procedure allow for the proposed bacterial sensor to be applied as disposable devices.