Forming carbon nanotube composites by directly coating forests with inorganic materials using low pressure chemical vapor deposition

Chandrashekar, A.; Ramachandran, S.; Pollack, G.; Lee, J.-S.; Lee, G.S.; Overzet, Lawrence

doi:10.1016/j.tsf.2008.06.064

Cited by 15 publications

(8 citation statements)

References 27 publications

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“…The thickness variation along the z‐ axis is just 6 nm over the full micropin height (Figure d). The remarkable coating infiltration of LPCVD a‐SiC was also observed in other works focused on others materials …”

supporting

confidence: 77%

Effects of Conformal Nanoscale Coatings on Thermal Performance of Vertically Aligned Carbon Nanotubes

Silvestri

Riccio

Poelma

et al. 2018

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The high aspect ratio and the porous nature of spatially oriented forest-like carbon nanotube (CNT) structures represent a unique opportunity to engineer a novel class of nanoscale assemblies. By combining CNTs and conformal coatings, a 3D lightweight scaffold with tailored behavior can be achieved. The effect of nanoscale coatings, aluminum oxide (Al O ) and nonstoichiometric amorphous silicon carbide (a-SiC), on the thermal transport efficiency of high aspect ratio vertically aligned CNTs, is reported herein. The thermal performance of the CNT-based nanostructure strongly depends on the achieved porosity, the coating material and its infiltration within the nanotube network. An unprecedented enhancement in terms of effective thermal conductivity in a-SiC coated CNTs has been obtained: 181% compared to the as-grown CNTs and Al O coated CNTs. Furthermore, the integration of coated high aspect ratio CNTs in an epoxy molding compound demonstrates that, next to the required thermal conductivity, the mechanical compliance for thermal interface applications can also be achieved through coating infiltration into foam-like CNT forests.

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supporting

confidence: 77%

Effects of Conformal Nanoscale Coatings on Thermal Performance of Vertically Aligned Carbon Nanotubes

Silvestri

Riccio

Poelma

et al. 2018

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“…Additionally, single-walled CNTs were also successfully filled with metal halide (RuCl 3 ) [42], forming the first single-walled CNT based core/shell nanowire heterostructures. After that, many inorganic nanotubes have been filled with various inorganic materials such as metals [43], alloys [40], semiconductors [36,44,45], insulators [39] and even metal-semiconductor heterojunctions [46,47] using different synthesis strategies such as capillary filling [31][32][33][34][35] and chemical vapor deposition [48][49][50], producing many kinds of core/shell nanowire heterostructures. These nanowire heterostructures open new possibilities of demonstrating unusual properties, which are realized by control over the composition and perfection of interfaces [51], and are increasingly important in the assembly of devices, which are functionalized by passivation, electrical insulation, and charge transfer and internal field generation [52].…”

Section: Introductionmentioning

confidence: 99%

Nanowires sheathed inside nanotubes: Manipulation, properties and applications

Liu

Zou

Bando

et al. 2015

Progress in Materials Science

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“…Two general methods of fabricating aligned CNT ceramic composites have been reported: i) alignment of CNTs during composite processing e.g. by extrusion [10] or electrophoretic deposition [11,12] and ii) infiltration of an aligned CNT preform with a ceramic precursor [4,13]. The first method suffers from the susceptibility of CNTs to agglomeration during processing and the CNTs are not continuous within the final composite.…”

Section: Introductionmentioning

confidence: 99%

“…The second method (infiltration) results not only in aligned CNTs, but also the CNTs are continuous within the matrix. We have previously reported the use of aligned CNT preforms for infiltration with a sol precursor [4] while Chandrashekar et al [13] used chemical vapour infiltration (CVI).…”

Section: Introductionmentioning

confidence: 99%

Stiffness, strength and interwall sliding in aligned and continuous multi-walled carbon nanotube/glass composite microcantilevers

et al. 2015

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Individual perfect multi-wall carbon nanotubes (MWCNT) can exhibit exceptional properties, such as an elastic modulus of ~1 TPa. However, integration of carbon nanotubes (CNTs) in bulk ceramic composites has not yet resulted in the significant improvements in mechanical properties that such data suggest to be achievable. Composites with aligned and continuous CNTs and with high CNT volume fractions might be expected to maximise the improvements. We have produced aligned MWCNT preforms by chemical vapour deposition and fabricated dense, aligned and continuous 20% MWCNT/glass composites. This was achieved by infiltration of a ceramic precursor sol into the interstices of a MWCNT preform and consolidation by hot-pressing. The elastic modulus was measured using microcantilever tests and showed a 32% improvement over that of glass. The Young's modulus inferred for the MWCNTs in the composite was 200 ± 20 GPa. The load-displacement curves showed a nonlinear and hysteretic behaviour which was attributed to interwall sliding within the MWCNTs. Apparent bridging of the cracks by the MWCNTs and a load maximum preceding failure

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Forming carbon nanotube composites by directly coating forests with inorganic materials using low pressure chemical vapor deposition

Cited by 15 publications

References 27 publications

Effects of Conformal Nanoscale Coatings on Thermal Performance of Vertically Aligned Carbon Nanotubes

Effects of Conformal Nanoscale Coatings on Thermal Performance of Vertically Aligned Carbon Nanotubes

Nanowires sheathed inside nanotubes: Manipulation, properties and applications

Stiffness, strength and interwall sliding in aligned and continuous multi-walled carbon nanotube/glass composite microcantilevers

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