Synthesis of Molybdenum Nanowires with Millimeter-Scale Lengths Using Electrochemical Step Edge Decoration
| Autor: | Kwok H. Ng, K. Inazu, Michael Zäch, Reginald M. Penner, and J. C. Hemminger |
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| Rok vydání: | 2002 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Analytical chemistry Nanowire chemistry.chemical_element General Chemistry Overpotential chemistry.chemical_compound Crystallography chemistry Highly oriented pyrolytic graphite Molybdenum Materials Chemistry Graphite Vapor–liquid–solid method Molybdenum dioxide |
| Zdroj: | Chemistry of Materials. 14:3206-3216 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/cm020249a |
| Popis: | Molybdenum (Mo0) nanowires with diameters ranging from 13 nm to 1 μm and having lengths of up to 500 μm have been synthesized by a two-step process involving the electrodeposition of molybdenum dioxide (MoO2) on a highly oriented pyrolytic graphite (HOPG) surface followed by reduction of the MoO2 nanowires at 500 °C to form molybdenum metal. MoO2 nanowires were electrodeposited reductively from an alkaline MoO42- solution using a low overpotential of 30 μm-1) of MoO2 nuclei was formed along each step edge on the graphite surface. With continued growth, MoO2 nuclei that were 10−15 nm in diameter coalesced with adjacent nuclei along the step edge to form continuous nanowires having approximately this same diameter. Longer deposition times, tdep, produced smooth MoO2 nanowires with diameters proportional to tdep1/2. These nanowires had a uniform diameter and a ... |
| Databáze: | OpenAIRE |
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