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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. ISSN 1388-0764. doi:10.1007/s11051-006-9168-4.

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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.

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Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 2006 Springer. Received 2 March 2006; accepted in revised form 22 August 2006. We thank Professors Jesen Grant and Marija Gajdardziska-Josifovska for providing TEM access and Dr. Bill Tivol and Mr. Donald Robertson for technical support with TEM analyses. The financial support for this study was provided by XMX Corporation, National Science Foundation (CTS-0604079), and University of Wisconsin-Milwaukee. The TIG welder used was donated by Miller Electric Manufacturing Corporation. The work made use of X-Ray Facilities supported by the MRSEC program of the National Science Foundation (CMR-0076097) at the Materials Research Center of Northwestern University.
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University of Wisconsin-MilwaukeeUNSPECIFIED
Subject Keywords:nanoparticles, nanocrystals, arc plasma, synthesis, nonagglomerated, nanoengineering
Issue or Number:2
Record Number:CaltechAUTHORS:20150818-110525238
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59727
Deposited By: Irina Meininger
Deposited On:19 Aug 2015 20:42
Last Modified:10 Nov 2021 22:24

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