Nano Archive

A simple and versatile mini-arc plasma source for nanocrystal synthesis

Chen, Junhong and Lu, Ganhua and Zhu, Liying and Flagan, Richard C. (2007) A simple and versatile mini-arc plasma source for nanocrystal synthesis. JOURNAL OF NANOPARTICLE RESEARCH, 9 (2). pp. 203-213.

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Nanocrystals in the lower-nanometer-size range are attracting growing interest due to their unique properties. A simple and versatile atmospheric direct current mini-arc plasma source has been developed to produce nanoparticles as small as a few nanometers. The nanoparticles are formed by direct vaporization of solid precursors followed by a rapid quenching. Both semiconductor tin oxide and metallic silver nanoparticles have been produced at rates of 1-10 mg/h using the mini-arc source. Transmission electron microscopy and X-ray diffraction analyses indicate that most nanoparticles as produced are nonagglomerated and crystalline. Size distributions of nanoparticles measured with an online scanning electrical mobility spectrometer are broader than the self-preserving distribution, suggesting that the nanoparticle growth is coagulation-dominated, and that the particles experience a range of residence times. The electrical charges carried by as-produced aerosol nanoparticles facilitate the manipulation of nanoparticles. The new mini-arc plasma source hence shows promise to accelerate the exploration of nanostructured materials.

Item Type:Article
Uncontrolled Keywords:nanoparticles; nanocrystals; arc plasma; synthesis; nonagglomerated; nanoengineering
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2667
Deposited By:Anuj Seth
Deposited On:09 Jan 2009 10:16
Last Modified:20 Jan 2009 11:11

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