Production of AlN Nanopowders by Electrical Wire Explosion in Liquid Nitrogen

Abstract

AlN nanopowders are successfully synthesized via electrical Al wire explosion in liquid nitrogen. After pickling in 15 % HCl-ethanel, the purified AlN nanopowders are characterized by various techniques. It is observed that the synthesized AlN nanoparticles are hexagonal AlN (h-AlN) exhibiting various shapes, including sphere, spheroidicity, polygon and hexagon. The results show that the charging voltage affects on the AlN content and the morphology of samples, significantly. Further more, it is observed that synthesized AlN particles in the size of 100-300 nm are coated by an amorphous layer mostly resulted from the high cooling rate in liquid nitrogen.

Formation of Blue-Emitting Colloidal Si Quantum Dots through Pulsed Discharge of Si Strips in Distilled Water Medium

“…62−64 Peng et al 53 prepared copper NPs in the size range of 10−180 nm by pulsed discharge of copper wire. Gao et al 59 prepared AlN nanopowders smaller than 10 nm by pulsed discharge of an Al wire in liquid nitrogen, also implying the potential on QDs preparation through PWD. Jiang et al 60 prepared carbon nanotube nanocomposites by a pulsed discharge of stainless steel capillaries filled with carbon nanotubes.…”

“…Multiple types of nanomaterials have been prepared through PWD method, such as metal NPs, ,, metal compound nanomaterials, , alloy NPs, , nanocomposites, − and carbon nanomaterials. − Peng et al prepared copper NPs in the size range of 10–180 nm by pulsed discharge of copper wire. Gao et al prepared AlN nanopowders smaller than 10 nm by pulsed discharge of an Al wire in liquid nitrogen, also implying the potential on QDs preparation through PWD. Jiang et al prepared carbon nanotube nanocomposites by a pulsed discharge of stainless steel capillaries filled with carbon nanotubes.…”

Nanomaterial Production from Metallic Vapor Bubble Collapse in Liquid Nitrogen

“…Fluid instabilities soon develop, promoting interactions such as energy transfer and chemical reactions between the hot explosion products and the cold ambient medium, which quenches the products into nanomaterials. This simple method can be used to prepare nanomaterials of pure metals, oxides, and nitrides by exploding the wire in various working ambient media [ 7 , 8 , 9 ].…”