Transmission electron microscopy and electron energy-loss spectroscopy analysis of manganese oxide nanowires

Journal Article · Mon Feb 07 04:00:00 EST 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1861963· OSTI ID:20637013

Du, G H; Yuan, Z Y; Tendeloo, G van ^[1]

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1. EMAT, University of Antwerp, Groenenborgerlann 171, B-2020 Antwerp (Belgium)

Single-crystalline MnOOH and Mn{sub 3}O{sub 4} nanowires have been prepared by hydrothermal treatment of commercial bulky manganese oxide particles. {beta}-MnO{sub 2} and {alpha}-Mn{sub 2}O{sub 3} nanowires were prepared by calcination of MnOOH nanowires. Transmission electron microscopy analysis demonstrates that MnOOH nanowires grow directly from MnO{sub 2} raw particles. The diameter of the nanowires is 20-70 nm, while the length can reach several micrometers. MnOOH nanowires grow preferentially along the [010] direction and Mn{sub 3}O{sub 4} nanowires prefer to grow along the [001] direction; the long dimension of both {beta}-MnO{sub 2} and {alpha}-Mn{sub 2}O{sub 3} nanowires is along [001]. Electron energy-loss spectroscopy analysis shows that the position of the prepeak of the oxygen K edge shifts to higher energy and the energy separation between the two main peaks of the oxygen K edge decreases with decreasing manganese oxidation state. The manganese-white-line ratios (L{sub 3}/L{sub 2}) were calculated.

• OSTI ID: 20637013
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 6 Vol. 86; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCINATION
ENERGY-LOSS SPECTROSCOPY
MANGANESE
MANGANESE OXIDES
MONOCRYSTALS
OXIDATION
OXYGEN
PARTICLES
QUANTUM WIRES
TRANSMISSION ELECTRON MICROSCOPY