11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method

Lee, Chang Hoon, Park, Seong-Hun, Jung, Jae Kap, Ryu, Kwon-Sang, Nahm, Seung Hoon, Kim, Joon and Chen, Ying 2005, 11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method, Solid state communications, vol. 134, no. 6, pp. 419-423.


Title 11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method
Formatted title 11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method
Author(s) Lee, Chang Hoon
Park, Seong-Hun
Jung, Jae Kap
Ryu, Kwon-Sang
Nahm, Seung Hoon
Kim, Joon
Chen, Ying
Journal name Solid state communications
Volume number 134
Issue number 6
Start page 419
End page 423
Publisher Elsevier Ltd
Place of publication Amsterdam, The Netherlands
Publication date 2005-05
ISSN 0038-1098
1879-2766
Keyword(s) nanotube
spin–lattice relaxation
nuclear magnetic resonance
Summary We reported 11B nuclear magnetic resonance studies of boron nitride (BN) nanotubes prepared by mechano-thermal route. The NMR lineshape obtained at 192.493 MHz (14.7 T) was fitted with two Gaussian functions, and the 11B nuclear magnetization relaxations were satisfied with the stretched–exponential function, exp[-(tlT1)(D+1)/6] (D: space dimension) at all temperatures. In addition, the temperature dependence of spin–lattice relaxation rates was well described by Ti-1 = aT (a: constant, T: temperature) and could be understood in terms of direct phonon process. All the 11BNMR results were explained by considering the inhomogeneous distribution of the paramagnetic metal catalysts, such as α-Fe, Fe–N, and Fe2 B, that were incorporated during the process of high-energy ball milling of boron powder and be synthesized during subsequent thermal annealing. X-ray powder diffraction as well as electron paramagnetic resonance (EPR) on BN nanotubes were also conducted and the results obtained supported these conclusions.
Language eng
Field of Research 100708 Nanomaterials
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2005, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30016482

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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