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Catalyst-Free Synthesis and Characterization of Metastable Boron Carbide Nanowires

Author(s)
Velamakanni, ArunaGanesh, K. J.Zhu, YanwuFerreira, Paulo J.Ruoff, Rodney S.
Issued Date
2009-12
DOI
10.1002/adfm.200901146
URI
https://scholarworks.unist.ac.kr/handle/201301/54347
Fulltext
https://onlinelibrary.wiley.com/doi/10.1002/adfm.200901146
Citation
ADVANCED FUNCTIONAL MATERIALS, v.19, no.24, pp.3926 - 3933
Abstract
Catalyst-free growth of boron carbide nanowires is achieved by pyrolysis of diborane and methane at 650-750 degrees C and around 500 mTorr in a quartz tube furnace. Electron-diffraction analysis using a novel diffraction-scanning transmission electron microscopy (D-STEM) technique indicates that the crystalline nanowires are single-crystal orthorhombic boron carbide. TEM images show that the nanowires are covered by a 1-3 nm thick amorphous layer of carbon. Elemental analysis by electron energy loss spectroscopy (EELS) shows only boron and carbon while energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) show the presence of oxygen as well as boron and carbon.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1616-301X
Keyword
CHEMICAL-VAPOR-DEPOSITIONTHIN-FILMSCVDCHEMISTRYMECHANISMCOATINGSMETHANE

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