Nano Archive

Continuous-flow laser synthesis of large quantities of iron oxide nanowires in solution

Mollah, S. and Henley, S. J. and Silva, S. R. P. (2008) Continuous-flow laser synthesis of large quantities of iron oxide nanowires in solution. NANOTECHNOLOGY, 19 (20).

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Official URL: http://www.iop.org/EJ/abstract/0957-4484/19/20/205...

Abstract

Large quantities of iron oxide nanowires are rapidly synthesized at room temperature by pulsed-laser (248 nm) ablation of iron powder under methanol. By introducing a stream of methanol, a continuous flow of nanoscale products is collected. Through control of the flow rate, and hence the residence time of the products within the growth vessel, their morphology can be controlled. At high collection rates a lamellate `nanobelt' morphology is observed, whereas at low collection rates nanowires dominate. Chemical and structural characterization suggests that the as-synthesized products have the stoichiometry of the goethite [FeO(OH)] phase. Annealing at temperatures above 400 degrees C crystallizes the products as hematite (alpha-Fe2O3).

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanochemistry
Analytical Science > Beam methods
ID Code:2398
Deposited By:Anuj Seth
Deposited On:17 Dec 2008 12:02
Last Modified:20 Jan 2009 10:24

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