Light-Addressable Electrochemical Sensing with Electrodeposited n-Silicon/Gold Nanoparticle Schottky Junctions.

Analytical Chemistry
Irina Terrero RodriguezGlen O'Neil

Abstract

Light-addressable electrochemical sensors (LAESs) are a class of sensors that use light to activate an electrochemical reaction on the surface of a semiconducting photoelectrode. Here, we investigate semiconductor/metal (Schottky) junctions formed between n-type Si and Au nanoparticles as light-addressable electrochemical sensors. To demonstrate this concept, we prepared n-Si/Au nanoparticle Schottky junctions by electrodeposition and characterized them using scanning electron microscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. We found that the sensors behaved almost identically to Au disk electrodes for the oxidation of an outer-sphere redox couple (ferrocene methanol) and two inner-sphere redox couples (potassium ferrocyanide and dopamine). In buffered dopamine solutions, we observed broad linear ranges and submicromolar detection limits. We then used local illumination to generate a virtual array of electrochemical sensors for dopamine as a strategy for circumventing sensor fouling, which is a persistent problem for electrochemical dopamine sensors. By locally illuminating a small portion of the photoelectrode, many measurements of fouling analytes can be made on a single sensor with a single electri...Continue Reading

References

Jun 15, 1992·Physical Review. B, Condensed Matter·R T Tung
Jun 19, 2008·Chemical Reviews·Richard L McCreery
Jun 26, 2008·Chemical Reviews·Donita L RobinsonR Mark Wightman
Mar 6, 2010·Accounts of Chemical Research·Arica A Lubin, Kevin W Plaxco
Nov 11, 2010·Chemical Reviews·Michael G WalterNathan S Lewis
Mar 28, 2013·Journal of the American Chemical Society·Jun Hui ParkAllen J Bard
Apr 4, 2013·ACS Applied Materials & Interfaces·Zhao YueNadja C Bigall
Dec 7, 2013·Analytical Chemistry·Anisha N PatelPatrick R Unwin
Oct 8, 2014·ACS Nano·Matěj VelickýRobert A W Dryfe
May 6, 2015·Annual Review of Analytical Chemistry·Elizabeth S Bucher, R Mark Wightman
Oct 20, 2015·Nature Materials·Andrew G ScheuermannPaul C McIntyre
Jul 1, 2016·The Journal of Physical Chemistry Letters·Andrew G Scheuermann, Paul C McIntyre
Feb 18, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Ying YangJ Justin Gooding
Dec 1, 2015·Chemical Science·Moinul H ChoudhuryJ Justin Gooding
Dec 9, 2017·Analytical Chemistry·Emilia PeltolaTomi Laurila
Dec 14, 2017·Nature Communications·Yan B VogelSimone Ciampi
Mar 24, 2018·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Ibadillah A DigdayaWilson A Smith
Jun 14, 2018·Nature Communications·Stephen G ParkerJ Justin Gooding
Sep 20, 2018·ACS Applied Materials & Interfaces·Daye SeoTaek Dong Chung
Apr 16, 2019·Analytical Chemistry·Fan WuSteffi Krause
May 24, 2019·ACS Applied Materials & Interfaces·Shuang ZhaoWolfgang J Parak
Jan 11, 2020·The Analyst·B Jill Venton, Qun Cao
Apr 15, 2020·Annual Review of Analytical Chemistry·Vinicius R GonçalesJ Justin Gooding

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