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Laser-induced nanostructuration of vertically aligned carbon nanotubes coated with nickel oxide nanoparticles

AutorPérez del Pino, Ángel ; Gyorgy, Eniko ; Hussain, Shahzad; Andújar Bella, José Luis; Pascual Miralles; Esther; Amade Rovira, Roger; Bertrán Serra, Enric
Palabras claveLithium-ion batteries
Induced chemical transformation
Microbial fuel-cells
Manganese oxide
Induced damage
Fecha de publicaciónabr-2017
CitaciónJournal of Materials Science 52(7): 4002-4015 (2017)
ResumenA versatile method is explored to decorate vertically aligned multi-walled carbon nanotubes (VACNTs) with NiO nanostructures. Multi-walled VACNTs are grown by plasma enhanced chemical vapor deposition and coated with NiO nanoparticles (NPs) by drop casting. After that, the system is submitted to nanosecond pulsed UV laser irradiation in atmospheric environment. Laser irradiation provokes rapid heating-melting-cooling processes which lead to the recrystallization of NiO NPs on the outer walls of VACNTs. In this way, and depending on the laser fluence and the number of accumulated pulses, different nano-architectures such as continuous NiO coatings and spiny features on VACNTs are obtained. High resolution scanning and transmission electron microscopies and Raman spectroscopy, corroborated with photothermal simulations, suggest that the grown nanostructures are mainly created by the laser-induced high temperatures (photothermal mechanisms). However, the observed reconstruction of the outer graphitic shells of VACNTs point to the catalytic action of NiO NPs, probably induced by the direct action of the laser radiation.
Versión del editorhttp://dx.doi.org/10.1007/s10853-016-0662-5
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