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Type: Artigo de periódico
Title: Effect of TiO2 nanoparticles on the thermal properties of decorated multiwall carbon nanotubes: A Raman investigation
Author: de Zevallos-Marquez, AMO
Brasil, MJSP
Iikawa, F
Abbaspourrad, A
Verissimo, C
Moshkalev, SA
Alves, OL
Abstract: We have investigated multiwalled carbon nanotubes decorated with TiO2 nanoparticles. Scanning electron microscopy and transmission electron microscopy measurements revealed that the TiO2 incorporates on the nanotubes forming large cauliflowerlike aggregates and/or small crystalline particles attached to the nanotube wall, depending on the growth conditions. A detailed Raman study was performed in pristine and a series of decorated nanotubes, where we analyzed both the Raman signal from the nanotubes and from the TiO2 nanoparticles. We demonstrate that the attached TiO2 nanoparticles affect significantly the thermal properties of the resulting hybrid nanostructure, as revealed by differentiated reactions to laser heating. This is a crucial point for modeling and optimization of devices based on nanotubes, which properties are strongly temperature dependent. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3496671]
Country: EUA
Editor: Amer Inst Physics
Citation: Journal Of Applied Physics. Amer Inst Physics, v. 108, n. 8, 2010.
Rights: aberto
Identifier DOI: 10.1063/1.3496671
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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