Iron Sulfide (FeS) Nanotubes Using Sulfurization of Hematite Nanowires

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• 作者：Dustin R. Cummins ; Harry B. Russell ; Jacek B. Jasinski ; Madhu Menon ; Mahendra K. Sunkara
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：June 12, 2013
• 年：2013
• 卷：13
• 期：6
• 页码：2423-2430
• 全文大小：610K
• 年卷期：v.13,no.6(June 12, 2013)
• ISSN：1530-6992

文摘

We report the phase transformation of hematite (伪-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鈥揼as reactions with nanowires involving sulfurization.

Keywords:

FeS; troilite; nanotubes; Kirkendall effect; optical properties; sulfurization; hematite nanowire arrays