Chauvin, A. ; Delacote, C. ; Molina-Luna, Leopoldo ; Dürrschnabel, Michael ; Boujtita, M. ; Thiry, D. ; Du, K. ; Ding, J. ; Choi, C.-H. ; Tessier, P. Y. ; El Mel, A.-A. (2016)
Planar Arrays of Nanoporous Gold Nanowires: When Electrochemical Dealloying Meets Nanopatterning.
In: ACS Applied Materials and Interfaces, 8 (10)
doi: 10.1021/acsami.5b11244
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Nanoporous materials are of great interest for various technological applications including sensors based on surface-enhanced Raman scattering, catalysis, and biotechnology. Currently, tremendous efforts are dedicated to the development of porous one-dimensional materials to improve the properties of such class of materials. The main drawback of the synthesis approaches reported so far includes (i) the short length of the porous nanowires, which cannot reach the macroscopic scale, and (ii) the poor organization of the nanostructures obtained by the end of the synthesis process. In this work, we report for the first time on a two-step approach allowing creating highly ordered porous gold nanowire arrays with a length up to a few centimeters. This two-step approach consists of the growth of gold/copper alloy nanowires by magnetron cosputtering on a nanograted silicon substrate, serving as a physical template, followed by a selective dissolution of copper by an electrochemical anodic process in diluted sulfuric acid. We demonstrate that the pore size of the nanowires can be tailored between 6 and 21 nm by tuning the dealloying voltage between 0.2 and 0.4 V and the dealloying time within the range of 150–600 s. We further show that the initial gold content (11 to 26 atom %) and the diameter of the gold/copper alloy nanowires (135 to 250 nm) are two important parameters that must carefully be selected to precisely control the porosity of the material.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Chauvin, A. ; Delacote, C. ; Molina-Luna, Leopoldo ; Dürrschnabel, Michael ; Boujtita, M. ; Thiry, D. ; Du, K. ; Ding, J. ; Choi, C.-H. ; Tessier, P. Y. ; El Mel, A.-A. |
| Art des Eintrags: | Bibliographie |
| Titel: | Planar Arrays of Nanoporous Gold Nanowires: When Electrochemical Dealloying Meets Nanopatterning |
| Sprache: | Englisch |
| Publikationsjahr: | 16 März 2016 |
| Verlag: | American Chemical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ACS Applied Materials and Interfaces |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1021/acsami.5b11244 |
| Kurzbeschreibung (Abstract): | Nanoporous materials are of great interest for various technological applications including sensors based on surface-enhanced Raman scattering, catalysis, and biotechnology. Currently, tremendous efforts are dedicated to the development of porous one-dimensional materials to improve the properties of such class of materials. The main drawback of the synthesis approaches reported so far includes (i) the short length of the porous nanowires, which cannot reach the macroscopic scale, and (ii) the poor organization of the nanostructures obtained by the end of the synthesis process. In this work, we report for the first time on a two-step approach allowing creating highly ordered porous gold nanowire arrays with a length up to a few centimeters. This two-step approach consists of the growth of gold/copper alloy nanowires by magnetron cosputtering on a nanograted silicon substrate, serving as a physical template, followed by a selective dissolution of copper by an electrochemical anodic process in diluted sulfuric acid. We demonstrate that the pore size of the nanowires can be tailored between 6 and 21 nm by tuning the dealloying voltage between 0.2 and 0.4 V and the dealloying time within the range of 150–600 s. We further show that the initial gold content (11 to 26 atom %) and the diameter of the gold/copper alloy nanowires (135 to 250 nm) are two important parameters that must carefully be selected to precisely control the porosity of the material. |
| Freie Schlagworte: | copper, dealloying, gold, nanoporous, nanowires |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Elektronenmikroskopie |
| Hinterlegungsdatum: | 10 Dez 2018 09:36 |
| Letzte Änderung: | 15 Sep 2021 08:09 |
| PPN: | |
| Sponsoren: | The JEOL JEM-2100F transmission electron microscope employed for this work was partially funded by the German Research Foundation (DFG/INST163/2951)., M.D. acknowledges financial support from the LOEWE research cluster RESPONSE (Hessen, Germany)., D.T. would like to thank “la Région des Pays de la Loire-France” for financially assisting this research project through the “Post-Doctorats internationaux” program. |
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