Raman study of inhomogeneities in carbon nanotube distribution in CNT-PMMA composites
2010 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 247, no 11-12, 2810-2813 p.Article in journal (Refereed) Published
This work is aimed at characterization of the carbon nanotube (CNT) distribution in polymethyl methacrylate (PMMA)-CNT composites by high-resolution Raman spectroscopy. In particular, we focus on study of the boundary regions between the CNT aggregates and the surrounding areas where the CNTs are well dispersed in the PMMA matrix. Different laser excitation energies (1.96 and 2.33 eV) were used to preferentially probe metallic and semiconducting SWCNTs, respectively. At both photon energies, spectral line scans across the boundary regions were performed revealing a substantial drop in intensity of G+ CNT Raman mode and an increase of the D/G+-intensity ratio. The latter testifies to a preferential dispersion of functionalized CNTs in the PMMA matrix. Certain inhomogeneities were observed by Raman spectral imaging even in the areas with well-dispersed CNTs.
Place, publisher, year, edition, pages
2010. Vol. 247, no 11-12, 2810-2813 p.
Natural sciences - Physics
Naturvetenskap - Fysik
Research subject Fysik
IdentifiersURN: urn:nbn:se:ltu:diva-13476DOI: 10.1002/pssb.201000198Local ID: cb21c6a0-0010-11e0-8b95-000ea68e967bOAI: oai:DiVA.org:ltu-13476DiVA: diva2:986429
Validerad; 2010; 20101205 (also)2016-09-292016-09-29Bibliographically approved