Localized-Plasmon Voltammetry to Detect pH Dependent Gold Oxidation

Bernhard Steinhauser; Cynthia Vidal; Ruxandra-Aida Barb; Johannes Heitz; Andrei Ionut Mardare; Achim Walter Hassel; Calin Hrelescu; Thomas Klar

doi:10.1021/acs.jpcc.7b11355

Localized-Plasmon Voltammetry to Detect pH Dependent Gold Oxidation

Bernhard Steinhauser, Cynthia Vidal, Ruxandra-Aida Barb, Johannes Heitz, Andrei Ionut Mardare, Achim Walter Hassel, Calin Hrelescu, Thomas Klar

Research output: Contribution to journal › Article › peer-review

Abstract

Localized-plasmon voltammetry (LPV) bears great potential for electrochemical sensing applications beyond conventional cyclic voltammetry. In order to determine the limitations of this method, it is of utmost necessity to investigate the response toward chemical instability of the plasmonic electrode. We therefore investigated electrooxidation of a gold nanowire array with LPV in acidic electrolytes with different pH values. LPV shows excellent agreement with simultaneously recorded cyclic voltammograms up to the onset of oxygen evolution. Beyond that point, LPV still appears to provide meaningful signals. Further, with LPV the pH dependent reduction potentials of electrochemically grown gold oxides were determined and show a linear characteristic over the investigated pH range according to Nernst’s equation.

Original language	English
Pages (from-to)	4565–4571
Number of pages	7
Journal	The Journal of Physical Chemistry C
Volume	122
DOIs	https://doi.org/10.1021/acs.jpcc.7b11355
Publication status	Published - 2018

Fields of science

204 Chemical Process Engineering
205016 Materials testing
210006 Nanotechnology
104014 Surface chemistry
105113 Crystallography
105116 Mineralogy
204001 Inorganic chemical technology
211104 Metallurgy
104005 Electrochemistry
104006 Solid state chemistry
104017 Physical chemistry
503013 Subject didactics of natural sciences

JKU Focus areas

Sustainable Development: Responsible Technologies and Management

Access to Document

10.1021/acs.jpcc.7b11355

Cite this

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title = "Localized-Plasmon Voltammetry to Detect pH Dependent Gold Oxidation",

abstract = "Localized-plasmon voltammetry (LPV) bears great potential for electrochemical sensing applications beyond conventional cyclic voltammetry. In order to determine the limitations of this method, it is of utmost necessity to investigate the response toward chemical instability of the plasmonic electrode. We therefore investigated electrooxidation of a gold nanowire array with LPV in acidic electrolytes with different pH values. LPV shows excellent agreement with simultaneously recorded cyclic voltammograms up to the onset of oxygen evolution. Beyond that point, LPV still appears to provide meaningful signals. Further, with LPV the pH dependent reduction potentials of electrochemically grown gold oxides were determined and show a linear characteristic over the investigated pH range according to Nernst{\textquoteright}s equation.",

author = "Bernhard Steinhauser and Cynthia Vidal and Ruxandra-Aida Barb and Johannes Heitz and Mardare, \{Andrei Ionut\} and Hassel, \{Achim Walter\} and Calin Hrelescu and Thomas Klar",

year = "2018",

doi = "10.1021/acs.jpcc.7b11355",

language = "English",

volume = "122",

pages = "4565–4571",

journal = "The Journal of Physical Chemistry C",

issn = "1932-7455",

publisher = "ACS Publications",

}

TY - JOUR

T1 - Localized-Plasmon Voltammetry to Detect pH Dependent Gold Oxidation

AU - Steinhauser, Bernhard

AU - Vidal, Cynthia

AU - Barb, Ruxandra-Aida

AU - Heitz, Johannes

AU - Mardare, Andrei Ionut

AU - Hassel, Achim Walter

AU - Hrelescu, Calin

AU - Klar, Thomas

PY - 2018

Y1 - 2018

N2 - Localized-plasmon voltammetry (LPV) bears great potential for electrochemical sensing applications beyond conventional cyclic voltammetry. In order to determine the limitations of this method, it is of utmost necessity to investigate the response toward chemical instability of the plasmonic electrode. We therefore investigated electrooxidation of a gold nanowire array with LPV in acidic electrolytes with different pH values. LPV shows excellent agreement with simultaneously recorded cyclic voltammograms up to the onset of oxygen evolution. Beyond that point, LPV still appears to provide meaningful signals. Further, with LPV the pH dependent reduction potentials of electrochemically grown gold oxides were determined and show a linear characteristic over the investigated pH range according to Nernst’s equation.

AB - Localized-plasmon voltammetry (LPV) bears great potential for electrochemical sensing applications beyond conventional cyclic voltammetry. In order to determine the limitations of this method, it is of utmost necessity to investigate the response toward chemical instability of the plasmonic electrode. We therefore investigated electrooxidation of a gold nanowire array with LPV in acidic electrolytes with different pH values. LPV shows excellent agreement with simultaneously recorded cyclic voltammograms up to the onset of oxygen evolution. Beyond that point, LPV still appears to provide meaningful signals. Further, with LPV the pH dependent reduction potentials of electrochemically grown gold oxides were determined and show a linear characteristic over the investigated pH range according to Nernst’s equation.

U2 - 10.1021/acs.jpcc.7b11355

DO - 10.1021/acs.jpcc.7b11355

M3 - Article

SN - 1932-7455

VL - 122

SP - 4565

EP - 4571

JO - The Journal of Physical Chemistry C

JF - The Journal of Physical Chemistry C

ER -