期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 196, 期 -, 页码 17-20出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2012.07.056
关键词
Mackinawite; Iron sulfide; Nanosheets; Metastable phase; Nanostructures; Solution synthesis
资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-08ER46483]
- NSF Graduate Research Fellowship
- Penn State MRSEC [NSF DMR-0820404]
Mackinawite, a metastable 1:1 compound of iron and sulfur that adopts an anti-PbO-type structure, is of interest because of its relationship to known iron chalcogenide superconductors, as well as its biogeochemical relevance. Colloidal nanosheets of mackinawite-type FeS were synthesized by first generating an amorphous Fe-S precursor via the aqueous room-temperature co-precipitation of Fe2+ and S2-, then solvothermally crystallizing it in ethylene glycol at 200 degrees C in an autoclave. The product is highly crystalline, with lattice constants of a=3.674(3) angstrom and c=5.0354(3) angstrom. The nanosheets, with their surface normal oriented along the [0 0 1] direction, are irregularly faceted with edge lengths that range from 100 nm to over 1 mu m and average thicknesses of approx. 30 nm. The samples showed a ferromagnetic background signal with no evidence of superconductivity. (C) 2012 Elsevier Inc. All rights reserved.
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