Please use this identifier to cite or link to this item: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/6149
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dc.contributor.authorJayasingha, Lakmini-
dc.contributor.authorJayathilaka, Charith-
dc.contributor.authorKumara, Roshantha-
dc.contributor.authorOhara, Koji-
dc.contributor.authorKaumal, Migelhewa-
dc.contributor.authorGunewardene, Siyath-
dc.contributor.authorDissanayake, Dhammike-
dc.contributor.authorJayanetti, J. K. D. S.-
dc.date.accessioned2021-09-28T20:38:08Z-
dc.date.available2021-09-28T20:38:08Z-
dc.date.issued2020-
dc.identifier.citationJayasingha, Lakmini., Jayathilaka, Charith., Kumara, Roshantha., Ohara, Koji., Kaumal, Migelhewa., Gunewardene, Siyath., Dissanayake, Dhammike., & Jayanetti, Sumedha (2020) Nanoporous Cu2O nanotube/nanorod array electrodes for non-enzymatic glucose sensing with high sensitivity and very low detection limit, Electrochimica Acta, 329, https://doi.org/10.1016/j.electacta.2019.135177en_US
dc.identifier.urihttp://archive.cmb.ac.lk:8080/xmlui/handle/70130/6149-
dc.description.abstractThis study compares the non-enzymatic glucose sensing performance by Cu2O nanorods/nanotubes grown using electrochemically anodized Cu foam and Cu plates to form binder free one-dimensional Cu(OH)2 nanostructures which were subsequently annealed at higher temperatures. Resulting Cu2O nanorods/nanotubes had diameters between 100 and 200 nm and lengths in excess of 10 mm. The surface morphology and structure of these thin films studied using scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy showed that the copper foam based Cu2O structures consisted of nanotubes/nanorods distributed over entire 3-dimensional space containing dense nano pores of size ~20 nm on outer surfaces. Cu plate based nanorods consisted of grooved macaroni type surface morphologies. Non-enzymatic glucose sensing made using chronoamperometric and cyclic voltammetric measurements showed that the Cu2O/Cu foam electrodes had a high sensitivity of 5792.7 mA mM 1 cm 2 , a very low detection limit of 15 nM (S/N ¼ 3), multi-linear detection ranges of 15 nMe0.1 mM and 575e4098.9 mM with a faster response time of less than 1 s. Cu plate based nanorods showed a sensitivity of 141.9 mA mM 1 cm 2 , with a lower detection limit of 510 nM (S/N ¼ 3). The significantly high sensitivity of Cu2O/Cu foam electrodes is attributed to the availability of increased amount of active sites due to the large effective surface area provided by Cu2O nanorods/nanotubes. The study also demonstrates the influence of the substrate on surface morphology of the nanorods/nano tubes. These Cu foam based Cu2O electrodes provide a promising platform for non-enzymatic glucose detection with high specificity and reproducibilityen_US
dc.language.isoenen_US
dc.subjectElectrochemical anodizationen_US
dc.subjectNanoporous Cu2O nanotubes/nanorods $ chronoamperometryen_US
dc.subjectSensitivityen_US
dc.subjectDetection limiten_US
dc.titleNanoporous Cu2O nanotube/nanorod array electrodes for non-enzymatic glucose sensing with high sensitivity and very low detection limiten_US
dc.typeArticleen_US
Appears in Collections:Department of Instrumentation & Automation Technology

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