| Autor: |
E K Athanassiou, R N Grass, W J Stark |
| Předmět: |
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| Zdroj: |
Nanotechnology; Mar2006, Vol. 17 Issue 6, p1668-1673, 6p |
| Abstrakt: |
Copper nanoparticles with a mean carbon coating of about 1nm were continuously produced at up to10gh−1 using amodified flame spray synthesis unit under highly reducing conditions. Raman spectroscopy and solid state13C magicangle spinning nuclear magnetic resonance spectroscopy revealed that the thin carbon layer consistedof a sp2-hybridized carbon modification in the form of graphene stacks. The carbon layer protectedthe copper nanoparticles from oxidation in air. Bulk pills of pressed carbon/coppernanoparticles displayed a highly pressure-and temperature-dependent electricalconductivity with sensitivity at least comparable to commercial materials. These propertiessuggest the use of thin carbon/copper nanocomposites as novel, low-cost sensor materialsand offer a metal-based alternative to the currently used brittle oxidic spinels orperovskites. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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