Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 183, Issue 7, Pages 1595-1603Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.05.006
Keywords
Nanostructures; Metal oxides; Organometallic synthesis; Pyrolysis; Battery materials; Intercalation
Funding
- FONDECYT [1085011, 1095135, 1090683, 1090282]
- PBCT [ACT027]
- Irish Government's Programme for Research in Third Level Institutions
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The solid-state pyrolysis of organometallic derivatives of a cyclotriphosphazene is demonstrated to be a new, simple and versatile solid-state templating method for obtaining single-crystal micro- and nanocrystals of transition and valve metal oxides. The technique, when applied to Mo-containing organometallics N3P3[OC6H4CH2CN center dot Mo(CO)(5)](6) and N3P3[OC6H4CH2CN center dot Mo(CO)(4) py](6), results in stand-alone and surface-deposited lamellar MoO3 single crystals, as determined by electron and atomic force microscopies and X-ray diffraction. The size and morphology of the resulting crystals can be tuned by the composition of the precursor. X-ray photoelectron and infrared spectroscopies indicate that the deposition of highly lamellar MoO3 directly on an oxidized (400 nm SiO2) surface or (100) single-crystal silicon surfaces yields a layered uniphasic single-crystal film formed by cluster diffusion on the surface during pyrolysis of the metal-carbonyl derivatives. For MoO3 in its layered form, this provides a new route to an important intercalation material for high energy density battery materials. (C) 2010 Elsevier Inc. All rights reserved.
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