3D Nanocomposites of Covalently Interconnected Multiwalled Carbon Nanotubes with SiC with Enhanced Thermal and Electrical Properties

Lakshmy Pulickal Rajukumar, Manuel Belmonte, John Edward Slimak, Ana Laura Elias Arriaga, Eduardo Cruz-Silva, Nestor Perea Lopez, Aaron Morelos-Gõmez, Humberto Terrones, Morinobu Endo, Pilar Miranzo, Mauricio Terrones Maldonado

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Synthesizing 3D carbon nanotube (CNT) networks with multifunctional characteristics has stimulated the interest from the scientific community since the 1990s. Here, the fabrication of a novel composite material consisting of 3D covalently interconnected multiwalled CNT with silicon carbide (SiC) nano and microparticles is reported. The material is synthesized by a two-step process involving the coating of CNT with silicon oxide (SiOx) via chemical routes, followed by spark plasma sintering (SPS). SPS enables carbothermal reduction of SiOx and subsequent densification of the material into 3D composite blocks. Covalent interconnections of CNT are facilitated by a carbon diffusion process resulting in SiC formation as SiOx coated CNT are subjected to high temperatures. The presence of SiC in the sintered composite has been confirmed by Raman spectroscopy, as well as through energy filtered transmission electron microscopy maps. Interestingly, the 3D CNT composite exhibits high thermal conductivity (16.72 W m-1 K-1); and also a semiconducting behavior with an electron hopping mechanism associated to a 3D variable range hopping model. These findings demonstrate that it is indeed possible to fabricate SiC-CNT composites with enhanced physical properties that can be used as multifunctional materials.

Original languageEnglish (US)
Pages (from-to)4985-4993
Number of pages9
JournalAdvanced Functional Materials
Volume25
Issue number31
DOIs
StatePublished - Aug 1 2015

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Carbon Nanotubes
Multiwalled carbon nanotubes (MWCN)
Silicon carbide
silicon carbides
Carbon nanotubes
Nanocomposites
nanocomposites
Electric properties
Thermodynamic properties
thermodynamic properties
carbon nanotubes
electrical properties
Silicon oxides
Composite materials
silicon oxides
composite materials
Spark plasma sintering
sparks
sintering
Carbothermal reduction

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Rajukumar, Lakshmy Pulickal ; Belmonte, Manuel ; Slimak, John Edward ; Elias Arriaga, Ana Laura ; Cruz-Silva, Eduardo ; Perea Lopez, Nestor ; Morelos-Gõmez, Aaron ; Terrones, Humberto ; Endo, Morinobu ; Miranzo, Pilar ; Terrones Maldonado, Mauricio. / 3D Nanocomposites of Covalently Interconnected Multiwalled Carbon Nanotubes with SiC with Enhanced Thermal and Electrical Properties. In: Advanced Functional Materials. 2015 ; Vol. 25, No. 31. pp. 4985-4993.
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3D Nanocomposites of Covalently Interconnected Multiwalled Carbon Nanotubes with SiC with Enhanced Thermal and Electrical Properties. / Rajukumar, Lakshmy Pulickal; Belmonte, Manuel; Slimak, John Edward; Elias Arriaga, Ana Laura; Cruz-Silva, Eduardo; Perea Lopez, Nestor; Morelos-Gõmez, Aaron; Terrones, Humberto; Endo, Morinobu; Miranzo, Pilar; Terrones Maldonado, Mauricio.

In: Advanced Functional Materials, Vol. 25, No. 31, 01.08.2015, p. 4985-4993.

Research output: Contribution to journalArticle

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