Microelectrode arrays with active-area geometries defined by spatial light modulation

Vogel, Yan B.; Molina, Angela; González Sánchez, Joaquín; Ciampi, Simone

Publication:
Microelectrode arrays with active-area geometries defined by spatial light modulation

dc.contributor.author	Vogel, Yan B.
dc.contributor.author	Molina, Angela
dc.contributor.author	González Sánchez, Joaquín
dc.contributor.author	Ciampi, Simone
dc.contributor.department	Química Física
dc.date.accessioned	2025-01-20T11:16:18Z
dc.date.available	2025-01-20T11:16:18Z
dc.date.issued	2020-10-01
dc.description	© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ This document is the Accepted Manuscript version of a Published Work that appeared in final form in Electrochimica Acta. To access the final edited and published work see https://doi.org/10.1016/j.electacta.2020.136849
dc.description.abstract	Microelectrode arrays form the basis of electrochemical sensing devices because of their unique properties, such as enhanced mass transport and steady-state diffusion currents. However, they demand a predefined and rigid geometry, and require a connecting pad for each element of the array. Here it is reported the formation of microelectrode arrays whose active area geometry is defined by the shape of a light pattern projected on an unstructured silicon electrode with a single electrical connection. Spatiotemporally resolved fluxes of charge carriers are used to confine a model electrochemical reaction only to the illuminated areas. By developing a theoretical model to analyze the current−potential data, it is revealed within which limits spatial light modulation can be used to enhance mass transport in a diffusive redox system on two silicon allotropes. Using this concept microelectrode geometry is adjusted instantaneously and at will by the operator on a homogeneous substrate with a single electrical connection.	es
dc.format	application/pdf	es
dc.format.extent	21	es
dc.identifier.citation	Electrochimica Acta, 2020, Vol. 356 : 136849
dc.identifier.doi	https://doi.org/10.1016/j.electacta.2020.136849
dc.identifier.issn	Print: 0013-4686
dc.identifier.uri	http://hdl.handle.net/10201/148812
dc.language	eng	es
dc.publisher	Elsevier	es
dc.relation	This work was supported by the Australian Research Council (DP190100735 and FT190100148 (S.C.)). J.G. and A.M. greatly appreciate the financial support provided by the Fundacion Séneca de la Región de Murcia (Project 19887/GERM/15).	es
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0013468620312421	es
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject	Microelectrode arrays	es
dc.subject	Semiconductor electrochemistry
dc.subject	Spatial light modulation
dc.subject	Light addressable electrochemistry
dc.subject	Monolayers on silicon
dc.subject.other	CDU::5 - Ciencias puras y naturales::54 - Química::544 - Química física	es
dc.title	Microelectrode arrays with active-area geometries defined by spatial light modulation	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es