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Issue 48, 2016
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Nanoscale thermal cloaking in graphene via chemical functionalization

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Abstract

Macro-thermal cloaking is typically produced by coordinate transformations, but this method is unsuitable for nanostructures. We designed a graphene-based nanoscale thermal cloak using a novel mechanism of phonon localization. The nanocloak in graphene was produced via the chemical functionalization of hydrogen, methyl and hydroxyl using molecular dynamics simulations. The cloaking performance was quantified by the ratio of thermal cloaking (RTC). We found that the RTC correlated with the functionalization fraction and it has a local maximum at a certain width, since the heat flux reduction in the exterior and the protected region reversed if the width was excessive. The atomic mass of the functional group also correlated with the RTC. Our simulations determined that phonon localization occurred due to sp2-to-sp3 bonding transitions, which caused the heat flux to avoid the transition region. Finally, the extent of phonon localization was related to the cloaking performance.

Graphical abstract: Nanoscale thermal cloaking in graphene via chemical functionalization

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Publication details

The article was received on 17 Oct 2016, accepted on 11 Nov 2016 and first published on 11 Nov 2016


Article type: Paper
DOI: 10.1039/C6CP07098A
Citation: Phys. Chem. Chem. Phys., 2016,18, 32952-32961
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    Nanoscale thermal cloaking in graphene via chemical functionalization

    Z. Ye and B. Cao, Phys. Chem. Chem. Phys., 2016, 18, 32952
    DOI: 10.1039/C6CP07098A

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