Please use this identifier to cite or link to this item: https://doi.org/10.1088/0957-4484/17/15/065
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dc.titleElectrochemical functionalization of vertically aligned carbon nanotube arrays with molybdenum oxides for the development of a surface-charge-controlled sensor
dc.contributor.authorYe, J.-S.
dc.contributor.authorWen, Y.
dc.contributor.authorZhang, W.-D.
dc.contributor.authorCui, H.F.
dc.contributor.authorXu, G.Q.
dc.contributor.authorSheu, F.-S.
dc.date.accessioned2014-10-16T08:27:22Z
dc.date.available2014-10-16T08:27:22Z
dc.date.issued2006-08-14
dc.identifier.citationYe, J.-S., Wen, Y., Zhang, W.-D., Cui, H.F., Xu, G.Q., Sheu, F.-S. (2006-08-14). Electrochemical functionalization of vertically aligned carbon nanotube arrays with molybdenum oxides for the development of a surface-charge-controlled sensor. Nanotechnology 17 (15) : 3994-4001. ScholarBank@NUS Repository. https://doi.org/10.1088/0957-4484/17/15/065
dc.identifier.issn09574484
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/93700
dc.description.abstractThe modification of inorganic polymeric oxides at the surface of carbon nanotubes is of paramount importance for developing new sensors. In this study, molybdenum oxide (MoOx) film was electrodeposited on the surface of multi-walled carbon nanotubes (MWNTs) by cycling the potential between +0.20 and -0.80V (versus 3M KCl-Ag|AgCl) in Na2MoO4 solution. The MoOx-modified nanotube (MoOx/MWNT) electrode displays well-defined redox transitions in 5mM H2SO4 or in phosphate buffer solution (PBS), which can be attributed to the reductive formation and the re-oxidation of hydrogen molybdenum oxides. X-ray photoelectron spectra (XPS) showed that the deposited MoOx films are mainly Mo6+ complexes. Both MWNT and MoOx/MWNT electrodes have ideal reversibility in 5mM K3[Fe(CN)6] in 1M KCl as supporting electrolytes at all sweep rates (0.02-1.00Vs-1) by cyclic voltammetry. The negatively charged surface of MoOx/MWNTs can further attract molecular cations such as Ru(NH3)6 3+. The MoOx/MWNT electrode exhibited electrocatalytic ability towards the reduction of bromate due to high surface area and the fast electron transfer rate of nanotubes. Thus, electrochemical modification of inorganic polymeric oxides on the carbon nanotube provides a simple method for the preparation of novel sensors. © IOP Publishing Ltd.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentBIOLOGICAL SCIENCES
dc.contributor.departmentCHEMISTRY
dc.description.doi10.1088/0957-4484/17/15/065
dc.description.sourcetitleNanotechnology
dc.description.volume17
dc.description.issue15
dc.description.page3994-4001
dc.description.codenNNOTE
dc.identifier.isiut000239693600065
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