Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/17747
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ankah, Genesis Ngwa | - |
dc.contributor.author | Pareek, Aparna | - |
dc.contributor.author | Cherevko, Serhiy | - |
dc.contributor.author | Zegenhagen, Joerg | - |
dc.contributor.author | RENNER, Frank | - |
dc.date.accessioned | 2014-11-05T09:54:25Z | - |
dc.date.available | 2014-11-05T09:54:25Z | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | ELECTROCHIMICA ACTA, 140, p. 352-358 | - |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | http://hdl.handle.net/1942/17747 | - |
dc.description.abstract | Nanoporous gold (npg) produced by dealloying of Au alloys has been recently proposed for many different applications from catalysis to bio-sensors. Furthermore, Au alloys constitute an important model system in the context of corrosion, dealloying, and stress corrosion cracking. Adsorbed self-assembled monolayers of thiol molecules inhibit the dealloying reaction. On thiol-modified Cu-Au alloys dealloying finally proceeds in a localized reaction instead of a homogeneous process. Using ethanethiols as an example, we show here that thiols can be effectively removed by application of anodic oxidation. Homogeneous porosity forms then after an oxidation step. In-situ X-ray diffraction and crystal truncation rod analysis of ethanethiol-modified Au (001) confirms that a bare Au surface is recovered after a similar oxidation step. In consequence, a multi-step dealloying process including complete initial thiol-layers as well as partially or fully re-cleaned surfaces can produce different micro-cracks, providing larger scale openings, and homogeneous nanoporous Au in between. Such hierarchically structured surfaces may show superior applicability for reactions where mass transport into the porous layer plays a decisive role for the reaction rate or detection probability. (C) 2014 Elsevier Ltd. All rights reserved. | - |
dc.description.sponsorship | The financial support of the International Max Planck Research School for Surface and Interface Engineering in Advanced Materials (IMPRS-SurMat) is gratefully acknowledged by G.N.A. The authors would also like to thank ESRF (Grenoble, France) for the provision of beamtime as well as Lionel Andre, Helena Isern, and Manuel Perez for their assistance in using beamline ID32. The help of M. Schweizer for the X-ray data collection is highly appreciated. Finally, the authors would also like to acknowledge and remember the continuous support of D.M.Kolb during the earlier part of the project. | - |
dc.language.iso | en | - |
dc.rights | © 2014 Elsevier Ltd. All rights reserved. | - |
dc.subject.other | Dealloying; selective dissolution; electrochemical interface; self-assembled monolayers; X-ray diffraction; hierarchical structure; nanoporous gold | - |
dc.title | Hierarchical nanoporous films obtained by surface cracking on Cu-Au and ethanethiol on Au(001) | - |
dc.type | Journal Contribution | - |
dc.identifier.epage | 358 | - |
dc.identifier.spage | 352 | - |
dc.identifier.volume | 140 | - |
local.bibliographicCitation.jcat | A1 | - |
dc.description.notes | Renner, FU (reprint author), Hasselt Univ, Inst Mat Res, Diepenbeek, Belgium. frank.renner@uhasselt.be | - |
local.type.refereed | Refereed | - |
local.type.specified | Article | - |
dc.identifier.doi | 10.1016/j.electacta.2014.04.028 | - |
dc.identifier.isi | 000342528600046 | - |
item.fulltext | With Fulltext | - |
item.fullcitation | Ankah, Genesis Ngwa; Pareek, Aparna; Cherevko, Serhiy; Zegenhagen, Joerg & RENNER, Frank (2014) Hierarchical nanoporous films obtained by surface cracking on Cu-Au and ethanethiol on Au(001). In: ELECTROCHIMICA ACTA, 140, p. 352-358. | - |
item.contributor | Ankah, Genesis Ngwa | - |
item.contributor | Pareek, Aparna | - |
item.contributor | Cherevko, Serhiy | - |
item.contributor | Zegenhagen, Joerg | - |
item.contributor | RENNER, Frank | - |
item.accessRights | Restricted Access | - |
item.validation | ecoom 2015 | - |
crisitem.journal.issn | 0013-4686 | - |
crisitem.journal.eissn | 1873-3859 | - |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
ankah 1.pdf Restricted Access | Published version | 1.75 MB | Adobe PDF | View/Open Request a copy |
SCOPUSTM
Citations
13
checked on Sep 5, 2020
WEB OF SCIENCETM
Citations
18
checked on May 8, 2024
Page view(s)
170
checked on Sep 5, 2022
Download(s)
158
checked on Sep 5, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.