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Silver Nanoparticles and Graphitic Carbon Through Thermal Decomposition of a Silver/Acetylenedicarboxylic Salt

Dallas, Panagiotis and Bourlinos, Athanasios B. and Komninou, Philomela and Karakassides, Michael and Niarchos, Dimitrios (2009) Silver Nanoparticles and Graphitic Carbon Through Thermal Decomposition of a Silver/Acetylenedicarboxylic Salt. Nanoscale Research Letters, 4 (11). pp. 1358-1364.

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Official URL: http://www.springerlink.com/content/y626v277473115...

Abstract

Spherically shaped silver nanoparticles embedded in a carbon matrix were synthesized by thermal decomposition of a Ag(I)/acetylenedicarboxylic acid salt. The silver nanoparticles, which are formed either by pyrolysis at 300 °C in an autoclave or thermolysis in xylene suspension at reflux temperature, are acting catalytically for the formation of graphite layers. Both reactions proceed through in situ reduction of the silver cations and polymerization of the central acetylene triple bonds and the exact temperature of the reaction can be monitored through DTA analysis. Interestingly, the thermal decomposition of this silver salt in xylene partly leads to a minor fraction of quasicrystalline silver, as established by HR-TEM analysis. The graphitic layers covering the silver nanoparticles are clearly seen in HR-TEM images and, furthermore, established by the presence of sp2 carbon at the Raman spectrum of both samples.

Item Type:Article
Uncontrolled Keywords:Silver nanoparticles - Graphitization - Acetylenedicarboxylic acid - Nanocomposites
Subjects:Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:7930
Deposited By:IoN
Deposited On:13 Jan 2010 10:01
Last Modified:13 Jan 2010 10:01

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