Please use this identifier to cite or link to this item: https://doi.org/10.3390/ma6031011
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dc.titleGraphene versus multi-walled carbon nanotubes for electrochemical glucose biosensing
dc.contributor.authorZheng, D.
dc.contributor.authorVashist, S.K.
dc.contributor.authorDykas, M.M.
dc.contributor.authorSaha, S.
dc.contributor.authorAl-Rubeaan, K.
dc.contributor.authorLam, E.
dc.contributor.authorLuong, J.H.T.
dc.contributor.authorSheu, F.-S.
dc.date.accessioned2014-12-12T08:00:40Z
dc.date.available2014-12-12T08:00:40Z
dc.date.issued2013
dc.identifier.citationZheng, D., Vashist, S.K., Dykas, M.M., Saha, S., Al-Rubeaan, K., Lam, E., Luong, J.H.T., Sheu, F.-S. (2013). Graphene versus multi-walled carbon nanotubes for electrochemical glucose biosensing. Materials 6 (3) : 1011-1027. ScholarBank@NUS Repository. https://doi.org/10.3390/ma6031011
dc.identifier.issn19961944
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/117033
dc.description.abstractA simple procedure was developed for the fabrication of electrochemical glucose biosensors using glucose oxidase (GOx), with graphene or multi-walled carbon nanotubes (MWCNTs). Graphene and MWCNTs were dispersed in 0.25% 3-aminopropyltriethoxysilane (APTES) and drop cast on 1% KOH-pre-treated glassy carbon electrodes (GCEs). The EDC (1-ethyl-(3-dimethylaminopropyl) carbodiimide)-activated GOx was then bound covalently on the graphene- or MWCNT-modified GCE. Both the graphene- and MWCNT-based biosensors detected the entire pathophysiological range of blood glucose in humans, 1.4-27.9 mM. However, the direct electron transfer (DET) between GOx and the modified GCE's surface was only observed for the MWCNT-based biosensor. The MWCNT-based glucose biosensor also provided over a four-fold higher current signal than its graphene counterpart. Several interfering substances, including drug metabolites, provoked negligible interference at pathological levels for both the MWCNT- and graphene-based biosensors. However, the former was more prone to interfering substances and drug metabolites at extremely pathological concentrations than its graphene counterpart. © 2013 by the authors.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.3390/ma6031011
dc.sourceScopus
dc.subjectElectrochemical glucose sensor
dc.subjectGlucose oxidase
dc.subjectGraphene
dc.subjectMulti-walled carbon nanotubes
dc.typeArticle
dc.contributor.departmentNUS NANOSCIENCE & NANOTECH INITIATIVE
dc.description.doi10.3390/ma6031011
dc.description.sourcetitleMaterials
dc.description.volume6
dc.description.issue3
dc.description.page1011-1027
dc.identifier.isiut000316606700019
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