Insights into thermal characteristics of spiral carbon-based nanomaterials: From heat transport mechanisms to tunable thermal diode behavior

A Sharifian and T Karbaschi and A Rajabpour and M Baghani and JY Wu and M Baniassadi, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 189, 122719 (2022).

DOI: 10.1016/j.ijheatmasstransfer.2022.122719

The discovery of new ways and new materials to control heat transfer has always received significant at-tention. Carbon-based nanomaterials due to their outstanding thermal characteristics have been a promis-ing candidate for thermal transport and thermal rectification. A man-made spiral carbon-based nano -material (SCBN) possesses unique geometry characteristics and mechanical response gaining immense popularity for usage in nanodevices and nanocomposites. Using molecular dynamics simulation, thermal conductivity and thermal rectification of SCBNs have been scrutinized considering different geometry, hydrogenation effect, and mechanical response. Results show that the thermal conductivity of SCBN is utterly depended on geometry properties and heat direction; thus, thermal conductivity has obtained a wide variety from 4.1 W/mK to 45.4 W/mK. In addition, the gradient, full/pristine, and 30%hydrogena- tion/pristine of graphene helicoid (GH), as a special type of SCBNs, influence thermal rectification. Also, the results affirm a sharper increase in the hydrogenation ratio leads to higher thermal rectification. In-terestingly, the strain has a remarkable impact on the thermal rectification which changes from 18.1% to 51.5% for the 30%/pristine hydrogenated GH. Our result revealed that tunning heat transfer is completely possible by applying strain. Thus, SCBNs benefited from inherent novel properties have a great potential for usage in thermal management applications.& nbsp;(c) 2022 Elsevier Ltd. All rights reserved.

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