- Title
- Synthesis and characterization of boron/boron oxide nanorods
- Creator
- Zhu, D. M.; Kisi, E.
- Relation
- Journal of the Australian Ceramic Society Vol. 45, Issue 2, p. 49-53
- Relation
- http://www.austceram.com/ACS-Journal-2009-Zhu.asp
- Publisher
- Australian Ceramic Society
- Resource Type
- journal article
- Date
- 2009
- Description
- A large number of boron/boron oxide nanorods have been produced by high-energy ball milling amorphous boron powder using hardened steel balls and vial, followed by high temperature annealing. In an attempt to understand the growth mechanisms leading to such nanorods, we have examined as-milled and post-annealed boron powder, using Xray diffraction analysis (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The latter technique reveals nanoporous structures that appear in the boron samples milled at ambient temperature. XRD analysis has revealed the synthesised samples are a combination of boron, boron oxide and iron. Boron/boron oxide nanorods approximately 50-250 nm in diameter and up to 7 μm in length with the iron catalyst at the top were obtained by annealing the milled boron samples at 1200°C for 5 hours in nitrogen gas. High-energy ball milling may produce structural changes and chemical reactions induced by mechanical energy which leads to the growth of a large variety of structures far from equilibrium, among them the nuclei for nanorod growth. Upon elevated temperature annealing, these nanoporous structures provide for the growth of the existing nuclei and thus generate the boron/boron oxide nanorods with the assistance of iron catalyst particles.
- Subject
- boron nanorods; boron oxide nanorods; growth mechanisms; synthesis
- Identifier
- http://hdl.handle.net/1959.13/808867
- Identifier
- uon:7775
- Identifier
- ISSN:0004-881X
- Language
- eng
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