Tabrizi, N. S. and Xu, Q. and Pers, N. M. and Schmidt-Ott, A. (2009) Generation of mixed metallic nanoparticles from immiscible metals by spark discharge. Journal of Nanoparticle Research, 12 (1). pp. 247-259. ISSN 1388-0764 (Print) 1572-896X (Online)
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Using a spark discharge system, we synthesized Ag-Cu, Pt–Au and Cu-W mixed particles a few nanometers in size. These combinations have miscibility gaps in the bulk form. The microsecond sparks between electrodes consisting of the respective materials, form a vapour cloud. Very fast quenching of the mixed vapour results in the formation of nanoparticles. To investigate the morphology, size, composition and structure of the particles, TEM, XRD analyses and EDS elemental mapping were performed on the samples. The average compositions were measured by ICP and the specific surface areas were determined by the BET. Our method produces Ag-Cu and Au–Pt mixed crystalline phases that do not exist in macroscopic samples. For Cu-W, alloying is not observed, and the metals are mixed on a scale of about 1 nm.
|Uncontrolled Keywords:||Nanoparticles - Immiscible metals - Spark discharge - Synthesis method|
|Subjects:||Analytical Science > Microscopy and probe methods|
Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
|Deposited On:||01 Mar 2010 10:13|
|Last Modified:||01 Mar 2010 10:13|
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