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Proceedings Paper

Mechanico-chemical interaction of SWNTs with different host matrices evidenced by SERS spectroscopy
Author(s): Serge Lefrant; Mihaela Baibarac; Ioan Baltog; Christine Godon; Jean-Yves Mevellec; Lucian Mihut
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Paper Abstract

Surface enhanced Raman scattering (SERS) with 676.4 and 1064 nm excitations was used to investigate single-walled carbon nanotubes (SWNTs) compressed non-hydrostatically at 0.58 GPa, alone and dispersed into chemical reactive and non-reactive (SiO2 and Al2O3) host matrices. As reactive host matrices, we used inorganic compounds (KI and Ag microparticles) and aromatic hydrocarbons (biphenyl, naphthalene, p-terphenyl, phenantrene). SERS spectra indicate that by compression, SWNTs break in fragments of different size, which in turn can react or not with the host matrix. Various mechanico-chemical reactions take place. In inorganic matrices such as KI and Ag, donor-acceptor complexes are formed. Regardless of aromatic hydrocarbons type used as organic matrices, i.e. with isolated or condensed phenyl rings, a non-covalent functionalization of SWNTs is produced. Using aromatic hydrocarbons with isolated phenyl rings like biphenyl or p-terphenyl, an ionic and covalent functionalization of SWNT fragments is demonstrated by the appearance of new Raman bands at 1160 and 1458 cm-1, the latter being associated with the Ag(2) pentagonal pinch mode observed regularly in Raman spectra of C60 fullerenes. The signature for the appearance of short fragments of carbon nanotubes, behaving as closed-shell fullerenes, is observed also in photoluminescence spectra carried out on SWNTs compressed in biphenyl and p-terphenyl matrix. Additional proofs are found by transmission electron microscopy (TEM) investigations.

Paper Details

Date Published: 28 June 2005
PDF: 9 pages
Proc. SPIE 5838, Nanotechnology II, (28 June 2005); doi: 10.1117/12.608098
Show Author Affiliations
Serge Lefrant, Institut des Materiaux Jean Rouxel (France)
Mihaela Baibarac, National Institute of Materials Physics (Romania)
Ioan Baltog, National Institute of Materials Physics (Romania)
Christine Godon, Institut des Materiaux Jean Rouxel (France)
Jean-Yves Mevellec, Institut des Materiaux Jean Rouxel (France)
Lucian Mihut, National Institute of Materials Physics (Romania)


Published in SPIE Proceedings Vol. 5838:
Nanotechnology II
Paolo Lugli; Laszlo B. Kish; Javier Mateos, Editor(s)

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