resumo
We report on the synthesis of free-standing ZnO nanoparticles (NPs) and ZnO NPs-decorated multiwalled carbon nanotubes (MWCNTs) via nonhydrolytic sol-gel (NHSG) routes. The role of the hydrates in the zinc precursor on the structure and surface termination of ZnO NPs via NHSG routes has already been reported in our earlier study. In the present work, the synthesis has been carried out in ambient air without using a glovebox, whereupon the effects of the synthesis temperature have been studied systematically. The structure, morphology, and optical properties of the free-standing ZnO-NPs are compared with those of the carbon nanotube-based nanocomposites, ZnO:MWCNTs, synthesized Under identical conditions. The observed efficient and broad luminescence covering the entire visible spectrum points toward the high potential of the hybrid nanocomposites in optoelectronic and photovoltaic applications.
palavras-chave
OXIDE NANOCRYSTALS; NANOPARTICLES; NANOTUBES; NANOSTRUCTURES; LUMINESCENCE; EMISSION; GROWTH
categoria
Chemistry; Science & Technology - Other Topics; Materials Science
autores
Rauwel, E; Galeckas, A; Soares, MR; Rauwel, P
nossos autores
Maria do Rosário Teixeira Soares
Técnico de LaboratórioGrupos
agradecimentos
This research has been supported by the European Regional Development Fund project TK134 (TAR 16019). Financial support from the Estonian Research Council (grant PUT431), the Estonian Road Map infrastructure, and the NAMUR projects, MENESR and MAEDI French ministries (Parrot program no. 33787YJ). This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (ref. no. FCT UID/CTM/50011/2013), financed by national funds through FCT/MEC and cofinanced by FEDER under the PT2020 Partnership Agreement. Partial financial support by the Research Council of Norway and the University of Oslo through the FUNDAMENT project (FRINATEK program) is gratefully acknowledged.