Inductively coupled nonthermal plasma synthesis of aluminum nanoparticles.

Autor: Beaudette CA; Department of Mechanical Engineering, University of Minnesota - Twin Cities, Minneapolis, Minnesota, United States of America., Andaraarachchi HP; Department of Mechanical Engineering, University of Minnesota - Twin Cities, Minneapolis, Minnesota, United States of America., Wu CC; Weapon Sciences Division, Weapons and Materials Research Directorate, US Army Combat Capabilities Development Command Army Research Laboratory, Aberdeen Proving Ground, Maryland, United States of America., Kortshagen UR; Department of Mechanical Engineering, University of Minnesota - Twin Cities, Minneapolis, Minnesota, United States of America.
Jazyk: angličtina
Zdroj: Nanotechnology [Nanotechnology] 2021 Jul 06; Vol. 32 (39). Date of Electronic Publication: 2021 Jul 06.
DOI: 10.1088/1361-6528/ac0cb3
Abstrakt: Metallic nanoparticles of aluminum (Al), a nontoxic and earth-abundant element, are relevant to plasmonic and energetic applications. However, monodisperse Al nanoparticles are difficult to synthesize using all gas-phase approaches, especially in the 10 to 20 nm size range; yet, many applications require particles of this size due to their enhanced properties. Here, an inductive nonthermal plasma reactor fed with aluminum trichloride (AlCl 3 ) and Ar is used to synthesize single-crystal aluminum nanoparticles. The particles can be produced with or without hydrogen. Several reactor conditions such as AlCl 3 vapor concentration, flow rates, and power are found to strongly influence particle properties such as the oxide shell thickness, particle mono-dispersity, and particle size. Significant quantities of Ar relative to AlCl 3 , short residence times of 10 s of ms, and pressures in excess of 4.7 Torr are required to form Al particles with geometric mean sizes of 10-20 nm and geometric standard deviations as low as 1.3. While the Al nanoparticles are covered with 2-4 nm thick oxide shells, the best synthesis conditions yield particle sizes determined by electron microscopy that are comparable to crystallite sizes determined from x-ray diffraction.
(© 2021 IOP Publishing Ltd.)
Databáze: MEDLINE
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