resumo
Crystalline carbon-based materials are intrinsically chemically inert and good heat conductors, allowing their applications in a great variety of devices. A technological step forward in heat dissipators production can be given by tailoring the carbon phase microstructure, tuning the CV]) synthesis conditions. In this work, a rapid bottom-up synthesis of vertically aligned hybrid material comprising diamond thin platelets covered by a crystalline graphite layer was developed. A single run was designed in order to produce a high aspect ratio nanostructured carbon material favoring the thermal dissipation under convection-governed conditions. The produced material was characterized by multiwavelength Raman spectroscopy and electron microscopy (scanning and transmission), and the macroscopic heat flux was evaluated. The results obtained confirm the enhancement of heat dissipation rate in the developed hybrid structures, when compared to smooth nanocrystalline diamond films.
palavras-chave
CHEMICAL-VAPOR-DEPOSITION; NANOCRYSTALLINE DIAMOND; RAMAN-SPECTROSCOPY; THERMAL-PROPERTIES; FIELD-EMISSION; CVD DIAMOND; NANODIAMOND; GROWTH; FILMS; CARBON
categoria
Science & Technology - Other Topics; Materials Science
autores
Santos, NF; Holz, T; Santos, T; Fernandes, AJS; Vasconcelos, TL; Gouvea, CP; Archanjo, BS; Achete, CA; Silva, RF; Costa, FM
nossos autores
Nuno Miguel Franco dos Santos
Estudante de doutoramento
Rui Ramos Ferreira e Silva
Professor associado
Tiago André César dos Santos
Bolseiro de pós-Doutoramentoagradecimentos
The financial funding from the FCT projects NANO-CARBOMEMS PTDC/CTM-NAN/117284/2010 (FCOMP-01-0124-FEDER-020025) and PEst-C/CTM/LA0025/2013-14 is gratefully acknowledged. N.F.S. acknowledges financial support from the FCT PhD grant SFRH/BD/90017/2012. R.F.S. acknowledges the research grant from CNPq