Synthesis and Properties of Semiconducting Iron Pyrite (FeS2) Nanowires

TitleSynthesis and Properties of Semiconducting Iron Pyrite (FeS2) Nanowires
Publication TypeJournal Article
Year of Publication2012
AuthorsCabán-Acevedo, M, Faber, MS, Tan, Y, Hamers, RJ, Jin, S
JournalNano Letters
Date Published03/2012

We report the growth and structural, electrical, and optical characterization of vertically oriented single-crystalline iron pyrite (FeS2) nanowires synthesized via thermal sulfidation of steel foil for the first time. The pyrite nanowires have diameters of 4–10 nm and lengths greater than 2 μm. Their crystal phase was identified as cubic iron pyrite using high-resolution transmission electron microscopy, Raman spectroscopy, and powder X-ray diffraction. Electrical transport measurements showed the pyrite nanowires to be highly p-doped, with an average resistivity of 0.18 ± 0.09 Ω cm and carrier concentrations on the order of 1021 cm–3. These pyrite nanowires could provide a platform to further study and improve the physical properties of pyrite nanostructures toward solar energy conversion.