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Graphene-CNT junctions could be turned into excellent heat conductors

Thursday, January 5, 2017 3:46
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Researchers at Rice University have found that it may be possible to make graphene-carbon nanotube junctions excel at transferring heat, turning these into an attractive way to channel damaging heat away from next-generation nano-electronics. This could, in theory, be done by putting a cone-like “chimney” between the graphene and nanotube to eliminate the barrier that blocks heat from escaping.

Graphene and carbon nanotubes both excel at the rapid transfer of electricity and phonons, but when a nanotube grows from graphene, atoms facilitate the turn by forming heptagonal (seven-member) rings instead of the usual six-atom rings. Scientists have determined that forests of nanotubes grown from graphene are excellent for storing hydrogen for energy applications, but in electronics, the heptagons scatter phonons and hinder the escape of heat through the pillars.



Source: http://www.graphene-info.com/graphene-cnt-junctions-could-be-turned-excellent-heat-conductors

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