Journal
NANO LETTERS
Volume 13, Issue 6, Pages 2423-2430Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl400325s
Keywords
FeS; troilite; nanotubes; Kirkendall effect; optical properties; sulfurization; hematite nanowire arrays
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Funding
- DOE-EPSCoR [DE-FG02-07ER46375]
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [1125909] Funding Source: National Science Foundation
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We report the phase transformation of hematite (alpha-Fe2O3) single crystal nanowires to crystalline FeS nanotubes using sulfurization with H2S gas at relatively low temperatures. Characterization indicates that phase pure hexagonal FeS nanotubes were formed. Time-series sulfurization experiments suggest epitaxial growth of FeS as a shell layer on hematite. This is the first report of hollow, crystalline FeS nanotubes with NiAs structure and also on the Kirkendall effect in solid-gas reactions with nanowires involving sulfurization.
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