期刊
NANO LETTERS
卷 14, 期 2, 页码 799-805出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl404147r
关键词
Nanowires; nanotechnology; room temperature; transmission electron microscope; electron beam damage; radiolysis; gold catalysis
类别
资金
- DFC [KU 2347/2-2]
- Institute of Basic Science (IBS) Korea [EM: 1304]
Despite significant advances in the synthesis of nanostructures, our understanding of the growth mechanisms of nanowires and nanotubes grown from catalyst particles remains limited. In this study we demonstrate a straightforward route to grow coaxial amorphous B/BOx nanowires and BOx nanotubes using gold catalyst particles inside a transmission electron microscope at room temperature without the need of any specialized or expensive accessories. Exceedingly high growth rates (over 7 mu m/mm) are found for the coaxial nanowires, and this is attributed to the highly efficient diffusion of B species along the surface of a nanowire by electrostatic repulsion. On the other hand the O species are shown to be relevant to activate the gold catalysts, and this can occur through volatile O species. The technique could be further developed to study the growth of other nanostructures and holds promise for the room temperature growth of nanostructures as a whole.
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