Catalytic solid-phase seeding of silicon nanowires by nickel nanocrystals in organic solvents

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Colloidal nickel (Ni) nanocrystals were used to direct the synthesis of crystalline silicon (Si) nanowires in an organic solvent. The reaction temperatures ranged from 400 degrees C to 520 degrees C with pressures from 14.3 to 23.4 MPa, conditions that are well above the critical point of the solvent. The Ni nanocrystals play two roles in the synthesis: (1) Ni catalyzes the decomposition of the silicon precursors, i.e., arylsilanes, alkylsilanes, and trisilane, to silicon; (2) Ni nanocrystals induce silicon crystallization through the solid phase alloying of Si in the Ni seeds. We call this nanowire growth mechanism supercritical fluid-solid-solid (SFSS) synthesis.
Publisher
AMER CHEMICAL SOC
Issue Date
2005-04
Language
English
Article Type
Article
Keywords

CHEMICAL-VAPOR-DEPOSITION; GERMANIUM NANOWIRES; GROWTH; MECHANISMS; SI

Citation

NANO LETTERS, v.5, no.4, pp.681 - 684

ISSN
1530-6984
DOI
10.1021/nl050099d
URI
http://hdl.handle.net/10203/90475
Appears in Collection
CBE-Journal Papers(저널논문)
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