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

Chang Hoon Lee, Seong Hun Park, Jae Kap Jung, Kwon Sang Ryu, Seung Hoon Nahm, Joon Kim, Ying Chen

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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[-(t/T1)(D+1)/6] (D: space dimension) at all temperatures. In addition, the temperature dependence of spin-lattice relaxation rates was well described by T1-1=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.

Original languageEnglish
Pages (from-to)419-423
Number of pages5
JournalSolid State Communications
Volume134
Issue number6
DOIs
Publication statusPublished - 2005 May 1

Fingerprint

Boron nitride
boron nitrides
Nanotubes
nanotubes
Nuclear magnetic resonance
nuclear magnetic resonance
exponential functions
spin-lattice relaxation
balls
electron paramagnetic resonance
boron
Boron
Spin-lattice relaxation
Exponential functions
routes
Ball milling
Theophylline
catalysts
Powders
X ray powder diffraction

Keywords

  • A. Nanotube
  • D. Spin-lattice relaxation
  • E. Nuclear magnetic resonance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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; Chen, Ying.

In: Solid State Communications, Vol. 134, No. 6, 01.05.2005, p. 419-423.

Research output: Contribution to journalArticle

Lee, Chang Hoon ; Park, Seong Hun ; Jung, Jae Kap ; Ryu, Kwon Sang ; Nahm, Seung Hoon ; Kim, Joon ; Chen, Ying. / 11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method. In: Solid State Communications. 2005 ; Vol. 134, No. 6. pp. 419-423.
@article{e6f80f7b42c048e19be249cb1b0a1df4,
title = "11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method",
abstract = "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[-(t/T1)(D+1)/6] (D: space dimension) at all temperatures. In addition, the temperature dependence of spin-lattice relaxation rates was well described by T1-1=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.",
keywords = "A. Nanotube, D. Spin-lattice relaxation, E. Nuclear magnetic resonance",
author = "Lee, {Chang Hoon} and Park, {Seong Hun} and Jung, {Jae Kap} and Ryu, {Kwon Sang} and Nahm, {Seung Hoon} and Joon Kim and Ying Chen",
year = "2005",
month = "5",
day = "1",
doi = "10.1016/j.ssc.2005.01.052",
language = "English",
volume = "134",
pages = "419--423",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "6",

}

TY - JOUR

T1 - 11B nuclear magnetic resonance study of boron nitride nanotubes prepared by mechano-thermal method

AU - Lee, Chang Hoon

AU - Park, Seong Hun

AU - Jung, Jae Kap

AU - Ryu, Kwon Sang

AU - Nahm, Seung Hoon

AU - Kim, Joon

AU - Chen, Ying

PY - 2005/5/1

Y1 - 2005/5/1

N2 - 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[-(t/T1)(D+1)/6] (D: space dimension) at all temperatures. In addition, the temperature dependence of spin-lattice relaxation rates was well described by T1-1=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.

AB - 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[-(t/T1)(D+1)/6] (D: space dimension) at all temperatures. In addition, the temperature dependence of spin-lattice relaxation rates was well described by T1-1=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.

KW - A. Nanotube

KW - D. Spin-lattice relaxation

KW - E. Nuclear magnetic resonance

UR - http://www.scopus.com/inward/record.url?scp=15544387356&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=15544387356&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2005.01.052

DO - 10.1016/j.ssc.2005.01.052

M3 - Article

VL - 134

SP - 419

EP - 423

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 6

ER -