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Fabrication of Fe3O4 Nanoparticles Modified Electrode and Its Application for Voltammetric Sensing of Dopamine

2005; Wiley; Volume: 17; Issue: 9 Linguagem: Inglês

10.1002/elan.200403136

1521-4109

Bin Fang, Guangfeng Wang, Wenzhi Zhang, Maoguo Li, Xianwen Kan,

Electrochemical Analysis and Applications

ElectroanalysisVolume 17, Issue 9 p. 744-748 Full Paper Fabrication of Fe3O4 Nanoparticles Modified Electrode and Its Application for Voltammetric Sensing of Dopamine Bin Fang, Bin Fang wangyusandra@sina.com.cn School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorGuangfeng Wang, Guangfeng Wang School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorWenzhi Zhang, Wenzhi Zhang School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorMaoguo Li, Maoguo Li School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorXianwen Kan, Xianwen Kan School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this author Bin Fang, Bin Fang wangyusandra@sina.com.cn School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorGuangfeng Wang, Guangfeng Wang School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorWenzhi Zhang, Wenzhi Zhang School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorMaoguo Li, Maoguo Li School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this authorXianwen Kan, Xianwen Kan School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. ChinaSearch for more papers by this author First published: 26 April 2005 https://doi.org/10.1002/elan.200403136Citations: 87AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Magnetic nanoparticles of Fe3O4 approximately 5nm in size were synthesized and characterized by XRD and TEM. A novel gold electrode modified with Fe3O4 nanoparticles was then constructed and was characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The modified electrode exhibited strong promoting effect and high stability toward the electrochemical oxidation of dopamine (DA), which gave reversible redox peaks with a formal potential of 0.192 V (vs. Ag/AgCl) electrode in pH 7.0 phosphate buffer solution (PB). The anodic peak currents (measured by constant potential amperometry) increased linearly with the concentration of dopamine in the range of 1.5×10−7 to 4.0×10−4 M. The detection limit (S/N=3) obtained was 3.0×10−8 M. The relative standard deviation (RSD) of 8 successive scans was 3.41% for 1.5×10−6 M DA. The interference of ascorbic acid (AA) could be eliminated efficiently. The proposed method showed excellent sensitivity and recovery. Citing Literature Volume17, Issue9May 2005Pages 744-748 RelatedInformation