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Ai Y, Smida H, Ghilane J, Vilà N, Ghanbaja J, Walcarius A, Lacroix JC. Copper Nanowires through Oriented Mesoporous Silica: A Step towards Protected and Parallel Atomic Switches. Sci Rep 2017; 7:17752. [PMID: 29259182 PMCID: PMC5736686 DOI: 10.1038/s41598-017-17048-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 11/19/2017] [Indexed: 11/24/2022] Open
Abstract
The formation of copper atomic contacts has been investigated. Copper nanowires were grown by electrochemical deposition, in the scanning electrochemical microscopy (SECM) configuration, from a platinum microelectrode to an indium tin oxide (ITO) substrate. Self-termination leaves copper filaments between the two electrodes with an atomic point contact at the ITO electrode. Histogram analysis shows that the conductance of this contact is close to, or less than, 1 G0. Atomic contacts were also fabricated on ITO electrodes covered with vertically-aligned mesoporous silica films. Scanning Transmission Electron Microscopy images show that copper filaments occupy individual isolated nanopores. Contacts generated on bare ITO break down rapidly in sodium salicylate, whereas those generated in ITO/nanopores are unaffected; the nanopores protect the copper filaments. Finally, atomic switch behaviour was obtained using these ITO and ITO/nanopores electrodes.
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Affiliation(s)
- Yong Ai
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue Jean-Antoine de Baïf, F-75205, Paris, Cedex 13, France
| | - Hassiba Smida
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue Jean-Antoine de Baïf, F-75205, Paris, Cedex 13, France
| | - Jalal Ghilane
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue Jean-Antoine de Baïf, F-75205, Paris, Cedex 13, France.
| | - Neus Vilà
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564 CNRS and Université de Lorraine, 405 rue de Vandoeuvre, F-54600, Villers-lès-Nancy, France
| | - Jaafar Ghanbaja
- Institut Jean Lamour, UMR 7198 CNRS, Université de Lorraine, Parc de Saurupt, CS 50840, F-54011, Nancy, France
| | - Alain Walcarius
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564 CNRS and Université de Lorraine, 405 rue de Vandoeuvre, F-54600, Villers-lès-Nancy, France
| | - Jean Christophe Lacroix
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue Jean-Antoine de Baïf, F-75205, Paris, Cedex 13, France.
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Hwang TW, Branagan SP, Bohn PW. Chemical Noise Produced by Equilibrium Adsorption/Desorption of Surface Pyridine at Au–Ag–Au Bimetallic Atom-Scale Junctions Studied by Fluctuation Spectroscopy. J Am Chem Soc 2013; 135:4522-8. [DOI: 10.1021/ja400567j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tai-Wei Hwang
- Department
of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame,
Indiana 46556, United States
| | - Sean P. Branagan
- Department
of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame,
Indiana 46556, United States
| | - Paul W. Bohn
- Department
of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame,
Indiana 46556, United States
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