The effects of diameter and chirality on the thermal transport in free-standing and supported carbon-nanotubes

2012 ◽  
Vol 100 (23) ◽  
pp. 233105 ◽  
Author(s):  
Bo Qiu ◽  
Yan Wang ◽  
Qing Zhao ◽  
Xiulin Ruan
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Transport ◽  
Free Standing

scholarly journals Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3808 ◽  
Author(s):  
Blazej Podlesny ◽  
Bogumila Kumanek ◽  
Angana Borah ◽  
Ryohei Yamaguchi ◽  
Tomohiro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Parent Material ◽  
Free Standing ◽  
Two Phase ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Aqueous Two Phase Extraction

Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

scholarly journals A Thermal Transport Study of Branched Carbon Nanotubes with Cross and T-Junctions

2021 ◽  
Vol 11 (13) ◽  
pp. 5933
Author(s):  
Wei-Jen Chen ◽  
I-Ling Chang
Keyword(s):  
Heat Transfer ◽  
Carbon Nanotubes ◽  
Thermal Management ◽  
Thermal Transport ◽  
Topological Defects ◽  
Branch Length ◽  
Phonon Transport ◽  
Heat Current ◽  
Transport Mechanisms ◽  
Non Equilibrium Molecular Dynamics

This study investigated the thermal transport behaviors of branched carbon nanotubes (CNTs) with cross and T-junctions through non-equilibrium molecular dynamics (NEMD) simulations. A hot region was created at the end of one branch, whereas cold regions were created at the ends of all other branches. The effects on thermal flow due to branch length, topological defects at junctions, and temperature were studied. The NEMD simulations at room temperature indicated that heat transfer tended to move sideways rather than straight in branched CNTs with cross-junctions, despite all branches being identical in chirality and length. However, straight heat transfer was preferred in branched CNTs with T-junctions, irrespective of the atomic configuration of the junction. As branches became longer, the heat current inside approached the values obtained through conventional prediction based on diffusive thermal transport. Moreover, directional thermal transport behaviors became prominent at a low temperature (50 K), which implied that ballistic phonon transport contributed greatly to directional thermal transport. Finally, the collective atomic velocity cross-correlation spectra between branches were used to analyze phonon transport mechanisms for different junctions. Our findings deeply elucidate the thermal transport mechanisms of branched CNTs, which aid in thermal management applications.

Porous polylactic acid/carbon nanotubes/polyaniline composite film as flexible free-standing electrode for supercapacitors

2019 ◽  
Vol 294 ◽  
pp. 312-324 ◽  
Author(s):  
Qi Wang ◽  
Hongxing Wang ◽  
Pengcheng Du ◽  
Juanli Liu ◽  
Dong Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Composite Film ◽  
Polylactic Acid ◽  
Free Standing

Thermal transport of oil and polymer composites filled with carbon nanotubes

2011 ◽  
Vol 105 (4) ◽  
pp. 781-788 ◽  
Author(s):  
Vitaliy Datsyuk ◽  
Milana Lisunova ◽  
Maria Kasimir ◽  
Svitlana Trotsenko ◽  
Kati Gharagozloo-Hubmann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Composites ◽  
Thermal Transport

Novel dosimetric study of the sp2 to sp3 hybridisation ratio in free–standing carbon nanotubes buckypaper

2019 ◽  
Vol 154 ◽  
pp. 38-45 ◽  
Author(s):  
Abdulaziz H. Alanazi ◽  
Izabela Jurewicz ◽  
Amjad Alyahyawi ◽  
Abdullah Alsubaie ◽  
Steven Hinder ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Standing ◽  
Dosimetric Study

Coupled Vibrations in Index-Identified Carbon Nanotubes

2014 ◽  
Vol 1700 ◽  
pp. 69-77 ◽  
Author(s):  
Dmitry Levshov ◽  
Thierry Michel ◽  
Matthieu Paillet ◽  
Xuan Tinh Than ◽  
Huy Nam Tran ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Resolution ◽  
Electron Diffraction ◽  
Electron Spectroscopy ◽  
Free Standing ◽  
Transmission Electron ◽  
Resonant Raman ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTCombining high resolution transmission electron spectroscopy, electron diffraction, and resonant Raman spectroscopy experiments on the same suspended (free-standing) individual carbon nanotubes is the ultimate approach to relate unambiguously the structure and the intrinsic phonon features of these nano-systems.By using this approach, the effect of coupling between nanotubes on the phonons is investigated in two model nano-systems: (i) a bundle of two non-identical SWNTs (inhomogeneous dimer), (ii) double-walled carbon nanotubes.

Acoustic Phonon Lifetimes and Thermal Transport in Free-Standing and Strained Graphene

Nano Letters ◽  
2012 ◽  
Vol 12 (6) ◽  
pp. 2673-2678 ◽  
Author(s):  
Nicola Bonini ◽  
Jivtesh Garg ◽  
Nicola Marzari
Keyword(s):  
Thermal Transport ◽  
Acoustic Phonon ◽  
Free Standing ◽  
Strained Graphene
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