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Spectroscopic studies on self-supporting multi-wall carbon nanotube based composite films for sensor applications

Smajda, R. and Győri, Z. and Sápi, A. and Veres, M. and Oszkó, A. and Kis-Csitári, J. and Kukovecz, Á. and Kónya, Z. and Kiricsi, I. (2007) Spectroscopic studies on self-supporting multi-wall carbon nanotube based composite films for sensor applications. JOURNAL OF MOLECULAR STRUCTURE, 834. pp. 471-476. ISSN 0022-2860 (print); 1872-8014 (online)

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Abstract

Self-supporting composite buckypapers containing 50 wt% multi-wall carbon nanotubes (MWCNTs) and SnOx or VOx were prepared by filtration using two different methods. Either the metal-oxides were pre-prepared and mixed with the nanotubes only before filtration (co-filtration method), or the MWCNTs were placed into the synthesis autoclaves of the oxides (single-step method) and the buckypaper was filtered from the product of this synthesis. The resulting composites were characterized by high resolution scanning electron microscopy, XPS, IR and Raman spectroscopy. Whereas the co-filtered samples are simple mechanical mixtures of their individual components, in case of the single-step composites we have found evidence for the existence of an interfacial region between the carbon nanotubes and the metal oxides. This is verified by the appearance of Sn and V in lower oxidation state from the metal-oxide side as well as by the presence of a low-frequency shoulder of the Raman G-band from the carbon nanotube side. The latter feature resembles a Breit Wigner Fano type line which is characteristic for phonon coupling to an electronic continuum.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia > QD04 Organic chemistry / szerves kémia
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 14 Sep 2021 14:39
Last Modified: 25 Apr 2023 11:23
URI: http://real.mtak.hu/id/eprint/129415

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