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Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2022

Modulating thermal transport in a porous carbon honeycomb using cutting and deformation techniques

Résumé

During past years, there has been a flurry of investigations on the lattice thermal transport of three-dimensional (3D) graphene, but few studies on how to adjust this property effectively by present engineering technologies. In this work, thermal transport properties of a porous single layer carbon honeycomb (SL-dCHC-2) and its mechanical response are systematically studied. We show that the thermal conductivity of SL-dCHC-2 can be adjusted effectively by varying the tensile strain, and its value for SL-dCHC-2 is enhanced up to 11.3 times with 8% strain as compared to the unstrained case. This is exceedingly larger than what was observed for other two-dimensional (2D) materials such as silicene (7 times larger). This outstanding behavior is explained from the phonon mode level, indicating that the profound increase of thermal conductivity under tensile strain is attributed to the enhancement of phonon lifetime. Besides, the trend of root mean squared displacement, which is closely related to phonon anharmonic effect, correlates with the non-monotonic response of the dimerized C-C bonds at the linkage of the structure. These investigations and obtained results provide important guidance to develop 3D carbon honeycomb for several purposes such as molecular sieve and water purification applications.

Domaines

Matériaux
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Dates et versions

hal-03799717 , version 1 (06-10-2022)

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Yang Han, Chaoxiang Zhao, Hao Bai, Yanjun Li, Jiayue Yang, et al.. Modulating thermal transport in a porous carbon honeycomb using cutting and deformation techniques. Physical Chemistry Chemical Physics, 2022, 24 (5), pp.3207-3215. ⟨10.1039/D1CP04210F⟩. ⟨hal-03799717⟩
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