Photoreduction Kinetics of Sodium Tetrachloroaurate under Synchrotron Soft X-ray Exposure

Yuen-Yan Fong; Bradley Visser; Jason Gascooke; Bruce Cowie; Lars Thomsen; Gregory Metha; Mark Buntine; Hugh Harris

doi:10.1021/la200463k

Photoreduction Kinetics of Sodium Tetrachloroaurate under Synchrotron Soft X-ray Exposure

Yuen-Yan Fong, Bradley Visser, Jason Gascooke, Bruce Cowie, Lars Thomsen, Gregory Metha, Mark Buntine, Hugh Harris

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

51 Citations (Scopus)

Abstract

We report on the time evolution of the sodium tetrachloroaurate (NaAuCl₄) chemical properties as a function of soft X-ray exposure in a dried sample on a silicon surface using X-ray photoelectron spectroscopy (XPS). Our investigations provide mechanistic insight into the photoreduction kinetics from Au^III to Au^I and then Au^I to Au⁰. We unambiguously show that XPS photoreduction occurs in stepwise fashion via the Au^I state. Both photoreduction steps undergo first-order kinetics.

Original language	English
Pages (from-to)	8099-8104
Number of pages	6
Journal	Langmuir
Volume	27
Issue number	13
DOIs	https://doi.org/10.1021/la200463k
Publication status	Published - 5 Jul 2011

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title = "Photoreduction Kinetics of Sodium Tetrachloroaurate under Synchrotron Soft X-ray Exposure",

abstract = "We report on the time evolution of the sodium tetrachloroaurate (NaAuCl4) chemical properties as a function of soft X-ray exposure in a dried sample on a silicon surface using X-ray photoelectron spectroscopy (XPS). Our investigations provide mechanistic insight into the photoreduction kinetics from AuIII to AuI and then AuI to Au0. We unambiguously show that XPS photoreduction occurs in stepwise fashion via the AuI state. Both photoreduction steps undergo first-order kinetics.",

author = "Yuen-Yan Fong and Bradley Visser and Jason Gascooke and Bruce Cowie and Lars Thomsen and Gregory Metha and Mark Buntine and Hugh Harris",

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AU - Fong, Yuen-Yan

AU - Visser, Bradley

AU - Gascooke, Jason

AU - Cowie, Bruce

AU - Thomsen, Lars

AU - Metha, Gregory

AU - Buntine, Mark

AU - Harris, Hugh

PY - 2011/7/5

Y1 - 2011/7/5

N2 - We report on the time evolution of the sodium tetrachloroaurate (NaAuCl4) chemical properties as a function of soft X-ray exposure in a dried sample on a silicon surface using X-ray photoelectron spectroscopy (XPS). Our investigations provide mechanistic insight into the photoreduction kinetics from AuIII to AuI and then AuI to Au0. We unambiguously show that XPS photoreduction occurs in stepwise fashion via the AuI state. Both photoreduction steps undergo first-order kinetics.

AB - We report on the time evolution of the sodium tetrachloroaurate (NaAuCl4) chemical properties as a function of soft X-ray exposure in a dried sample on a silicon surface using X-ray photoelectron spectroscopy (XPS). Our investigations provide mechanistic insight into the photoreduction kinetics from AuIII to AuI and then AuI to Au0. We unambiguously show that XPS photoreduction occurs in stepwise fashion via the AuI state. Both photoreduction steps undergo first-order kinetics.

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