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Mesoporous Silica Sputter-Coated onto ITO : Electrochemical Processes, Ion Permeability, and Gold Deposition Through NanoPores

Vuorema, Anne ; Sillanpää, Mika ; Edler, Karen J. LU orcid ; Jaber, Robben ; Dale, Sara E.C. ; Bending, Simon ; Gu, Yunfeng ; Yunus, Kamran ; Fisher, Adrian C. and Marken, Frank (2012) In Electroanalysis 24(6). p.1296-1305
Abstract

"Simple" silica films of 50nm and 100nm thickness are sputter-coated onto ITO substrates and shown to be structured with in-planed features of ca. 15nm and pores <5nm (based on GISAXS). In electrochemical measurements membrane pore effects are observed. The oxidation current for Fe(CN)64- in aqueous KNO3 strongly depends on the electrolyte concentration. Poly-cationic poly(diallyl-dimethylammonium) (PDDA) cannot enter these pores, but is adsorbed onto the outer surface of the silica film. During gold electrodeposition, PDDA causes growth of "discs". Gold deposits adhere well and a comparison of glucose electrooxidation activity reveals significant improvements.

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author
; ; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Electrodeposition, Gold, Membrane, Membrane sensor, Poly-electrolyte, Silica, Sputter-coating, Tin-doped indium oxide, Voltammetry
in
Electroanalysis
volume
24
issue
6
pages
10 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:84861859518
ISSN
1040-0397
DOI
10.1002/elan.201200141
language
English
LU publication?
no
id
a338f734-7b18-4a04-98f3-173006c63599
date added to LUP
2023-05-04 18:53:10
date last changed
2023-06-08 12:35:16
@article{a338f734-7b18-4a04-98f3-173006c63599,
  abstract     = {{<p>"Simple" silica films of 50nm and 100nm thickness are sputter-coated onto ITO substrates and shown to be structured with in-planed features of ca. 15nm and pores &lt;5nm (based on GISAXS). In electrochemical measurements membrane pore effects are observed. The oxidation current for Fe(CN)<sub>6</sub><sup>4-</sup> in aqueous KNO<sub>3</sub> strongly depends on the electrolyte concentration. Poly-cationic poly(diallyl-dimethylammonium) (PDDA) cannot enter these pores, but is adsorbed onto the outer surface of the silica film. During gold electrodeposition, PDDA causes growth of "discs". Gold deposits adhere well and a comparison of glucose electrooxidation activity reveals significant improvements.</p>}},
  author       = {{Vuorema, Anne and Sillanpää, Mika and Edler, Karen J. and Jaber, Robben and Dale, Sara E.C. and Bending, Simon and Gu, Yunfeng and Yunus, Kamran and Fisher, Adrian C. and Marken, Frank}},
  issn         = {{1040-0397}},
  keywords     = {{Electrodeposition; Gold; Membrane; Membrane sensor; Poly-electrolyte; Silica; Sputter-coating; Tin-doped indium oxide; Voltammetry}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{1296--1305}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Electroanalysis}},
  title        = {{Mesoporous Silica Sputter-Coated onto ITO : Electrochemical Processes, Ion Permeability, and Gold Deposition Through NanoPores}},
  url          = {{http://dx.doi.org/10.1002/elan.201200141}},
  doi          = {{10.1002/elan.201200141}},
  volume       = {{24}},
  year         = {{2012}},
}