Reference : Raman spectroscopy of single-wall boron nitride nanotubes

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/10317

Title :	Raman spectroscopy of single-wall boron nitride nanotubes
Language :	English
Author, co-author :	Arenal, R. [Laboratoire d'Etudes des Microstructures, ONERA - CNRS / Materials Science Division, Argonne National Laboratory]
	Ferrari, A. C. [University of Cambridge > Department of Engineering]
	Reich, S. [University of Cambridge, Department of Engineering / Massachussets Institute of Technology, Department of Material Science and Technology]
	Wirtz, Ludger [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Mevellec, J.-Y. [Institut des Materiaux Jean Rouxel, Laboratoire de Physique Cristalline]
	Lefrant, S. [Institut des Materiaux Jean Rouxel > Laboratoire de Physique Cristalline]
	Rubio, A. [Institut fuer Theoretische Physik, Freie Universität Berlin / European Theorical Spectroscopy Facility (ETSF)]
	Loiseau, A. [Institut fuer Theoretische Physik, Freie Universität Berlin / European Theorical Spectroscopy Facility (ETSF)]
Publication date :	2006
Journal title :	Nano Letters
Publisher :	American Chemical Society
Volume :	6
Issue/season :	8
Pages :	1812-1816
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	1530-6984
e-ISSN :	1530-6992
City :	Washington
Country :	DC
Abstract :	[en] Single-wall boron nitride nanotubes samples synthesized by laser vaporization of a hexagonal BN target under a nitrogen atmosphere are studied by UV and visible Raman spectroscopy. We show that resonant conditions are necessary for investigating phonon modes of BNNTs. Raman excitation in the UV (229 nm) provides preresonant conditions, allowing the identification of the A(1) tangential mode at 1370 cm(-1). This is 5 cm(-1) higher than the E-2g mode in bulk h-BN. Ab initio calculations show that the lower frequency of bulk h-BN with respect to large diameter nanotubes and the single sheet of h-BN is related to a softening of the sp2 bonds in the bulk due to interlayer interaction.
Permalink :	http://hdl.handle.net/10993/10317
DOI :	10.1021/nl0602544

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