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Development of nanoporous gold electrodes for electrochemical applications

Quan, Xueling; Fischer, Lee M.; Boisen, Anja and Tenje, Maria LU (2011) In Microelectronic Engineering 88(8). p.2379-2382
Abstract
In this work we have used simple microfabrication techniques and chemical de-alloying of co-sputtered AgAu alloys to create nanoporous gold (np-Au) electrodes. The physical properties of the np-Au electrodes were investigated using scanning electron microscopy with energy dispersive X-ray analysis, X-ray photo-electron spectroscopy and profilometer. The electrochemical performance of the np-Au electrodes was measured by cyclic voltammetry and electrochemical impedance spectroscopy. We have fabricated np-Au electrodes with pore sizes between 10 nm and 60 nm, directly related to the Ag:Au ratio. The electrochemical results reveal that np-Au electrodes have much lower impedance than the conventional Au electrodes, due to the significantly... (More)
In this work we have used simple microfabrication techniques and chemical de-alloying of co-sputtered AgAu alloys to create nanoporous gold (np-Au) electrodes. The physical properties of the np-Au electrodes were investigated using scanning electron microscopy with energy dispersive X-ray analysis, X-ray photo-electron spectroscopy and profilometer. The electrochemical performance of the np-Au electrodes was measured by cyclic voltammetry and electrochemical impedance spectroscopy. We have fabricated np-Au electrodes with pore sizes between 10 nm and 60 nm, directly related to the Ag:Au ratio. The electrochemical results reveal that np-Au electrodes have much lower impedance than the conventional Au electrodes, due to the significantly higher surface area to volume ratio of np-Au. The np-Au electrodes made from Ag66Au34 and Ag60Au40 show more than 10-fold magnitude reduction in impedance compared to conventional Au electrodes. These results show that np-Au electrodes have a great potential for electrochemical applications. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nanoporous gold, Electrochemistry, Cyclic voltammetry, Electrochemical impedance spectroscopy
in
Microelectronic Engineering
volume
88
issue
8
pages
2379 - 2382
publisher
Elsevier
external identifiers
  • scopus:79960036994
ISSN
1873-5568
DOI
10.1016/j.mee.2010.12.121,
language
English
LU publication?
no
id
4391841e-f49e-458f-a83e-10e94cb6be67 (old id 3129911)
date added to LUP
2012-10-16 13:50:35
date last changed
2017-01-01 04:03:39
@article{4391841e-f49e-458f-a83e-10e94cb6be67,
  abstract     = {In this work we have used simple microfabrication techniques and chemical de-alloying of co-sputtered AgAu alloys to create nanoporous gold (np-Au) electrodes. The physical properties of the np-Au electrodes were investigated using scanning electron microscopy with energy dispersive X-ray analysis, X-ray photo-electron spectroscopy and profilometer. The electrochemical performance of the np-Au electrodes was measured by cyclic voltammetry and electrochemical impedance spectroscopy. We have fabricated np-Au electrodes with pore sizes between 10 nm and 60 nm, directly related to the Ag:Au ratio. The electrochemical results reveal that np-Au electrodes have much lower impedance than the conventional Au electrodes, due to the significantly higher surface area to volume ratio of np-Au. The np-Au electrodes made from Ag66Au34 and Ag60Au40 show more than 10-fold magnitude reduction in impedance compared to conventional Au electrodes. These results show that np-Au electrodes have a great potential for electrochemical applications.},
  author       = {Quan, Xueling and Fischer, Lee M. and Boisen, Anja and Tenje, Maria},
  issn         = {1873-5568},
  keyword      = {Nanoporous gold,Electrochemistry,Cyclic voltammetry,Electrochemical impedance spectroscopy},
  language     = {eng},
  number       = {8},
  pages        = {2379--2382},
  publisher    = {Elsevier},
  series       = {Microelectronic Engineering},
  title        = {Development of nanoporous gold electrodes for electrochemical applications},
  url          = {http://dx.doi.org/10.1016/j.mee.2010.12.121,},
  volume       = {88},
  year         = {2011},
}