Cu nanodendrite foams on integrated band array electrodes for the nonenzymatic detection of glucose

Juska, Vuslat B.; Walcarius, Alain; Pemble, Martyn E.

Cu nanodendrite foams on integrated band array electrodes for the nonenzymatic detection of glucose

dc.contributor.author	Juska, Vuslat B.
dc.contributor.author	Walcarius, Alain
dc.contributor.author	Pemble, Martyn E.
dc.contributor.funder	Department of Agriculture, Food and the Marine, Ireland	en
dc.date.accessioned	2021-11-09T13:00:29Z
dc.date.available	2021-11-09T13:00:29Z
dc.date.issued	2019-08-07
dc.description.abstract	We demonstrate the successful electrodeposition of Cu nanodendrite foams (CuFoams) onto a series of lithographically formed gold band array electrodes at negative overpotentials in an acidic environment. The nanodendrite foams were deposited onto two different integrated microelectrode arrays fabricated using standard lithographic techniques. Each electrode consisted of 17 gold band electrodes deposited onto a silicon wafer substrate, labeled BA5 (with a width of 5 μm and a length of 250 μm) and BA10 (with a width of 10 μm and a length of 500 μm). Prior to Cu deposition the gold electrodes were characterized by scanning electron microscopy (SEM) in order to evaluate the morphology of each design and by cyclic voltammetry (CV) in order to investigate their diffusion profiles. After Cu deposition the resulting 3D foam structures were studied using SEM, XPS, and EDX. The CuFoam/Au microelectrodes were then used for the electrocatalytic detection of glucose via oxidation at a potential of +0.45 V vs Ag/AgCl in an alkaline medium. It was found that both types of electrode arrays used showed excellent analytical performance in terms of sensitivity, reproducibility, and stability in comparison with the best performances reported in the literature. In particular, the BA5-CuFoam electrode exhibited an outstanding sensitivity of 10,630 μA mM–1 cm–2 toward glucose with a wide linear range up to 22.55 mM, while the BA10-CuFoam electrode showed a sensitivity of 4,437 μA mM–1 cm–2. The performance of the proposed electrochemical sensor is attributed to a combination of the use of the very high surface area Cu nanodendrite foam and the enhanced radial distribution profile associated with the use of the smaller band microfabricated electrodes. Additionally, both sensors also showed a strong resistance to the poisoning effects of chlorine ions and excellent stability over a period of three months.	en
dc.description.status	Peer reviewed	en
dc.description.version	Accepted Version	en
dc.format.mimetype	application/pdf	en
dc.identifier.citation	Juska, V. B., Walcarius, A. and Pemble, M. E. (2019) 'Cu nanodendrite foams on integrated band array electrodes for the nonenzymatic detection of glucose', ACS Appl. Nano Mater, 2 (9), pp.5878-5889. doi: 10.1021/acsanm.9b01325	en
dc.identifier.doi	10.1021/acsanm.9b01325	en
dc.identifier.eissn	2574-0970
dc.identifier.endpage	5889	en
dc.identifier.issued	9	en
dc.identifier.journaltitle	ACS Applied Nano Material	en
dc.identifier.startpage	5878	en
dc.identifier.uri	https://hdl.handle.net/10468/12173
dc.identifier.volume	2	en
dc.language.iso	en	en
dc.publisher	American Chemical Society (ACS)	en
dc.relation.project	Department of Agriculture, Food and the Marine, Ireland (Award number 14F883)	en
dc.rights	© 2019, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Material, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.9b01325	en
dc.subject	Microfabrication	en
dc.subject	Band array electrode	en
dc.subject	Electrocatalysis	en
dc.subject	Copper nanodendrites	en
dc.subject	Nonenzymatic sensors	en
dc.title	Cu nanodendrite foams on integrated band array electrodes for the nonenzymatic detection of glucose	en
dc.type	Article (peer-reviewed)	en