Document Detail


Selective and sensitive determination of dopamine by composites of polypyrrole and graphene modified electrodes.
MedLine Citation:
PMID:  22010122     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A novel method is developed to fabricate the polypyrrole (PPy) and graphene thin films on electrodes by electrochemical polymerization of pyrrole with graphene oxide (GO) as a dopant, followed by electrochemical reduction of GO in the composite film. The composite of PPy and electrochemically reduced graphene oxide (eRGO)-modified electrode is highly sensitive and selective toward the detection of dopamine (DA) in the presence of high concentrations of ascorbic acid (AA) and uric acid (UA). The sensing performance of the PPy/eRGO-modified electrode is investigated by differential pulse voltammetry (DPV), revealing a linear range of 0.1-150 μM with a detection limit of 23 nM (S/N = 3). The practical application of the PPy/eRGO-modified electrode is successfully demonstrated for DA determination in human blood serum.
Authors:
Peng Si; Hailan Chen; Palanisamy Kannan; Dong-Hwan Kim
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-10-19
Journal Detail:
Title:  The Analyst     Volume:  -     ISSN:  1364-5528     ISO Abbreviation:  -     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372652     Medline TA:  Analyst     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 70, Nanyang Drive, Singapore637457. dhkim@ntu.edu.sg.
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