Regulating nanoscale heat transfer with Janus nanoparticles

Autor:	Xie, Chen, Wilson, Blake, Qin, Zhenpeng
Rok vydání:	2023
Předmět:	Physics - Applied Physics
Druh dokumentu:	Working Paper
Popis:	Janus nanoparticles (JNPs) with heterogeneous compositions or interfacial properties can exhibit directional heating upon external excitation, such as laser radiation and magnetic field. This directional heating may be harnessed for new nanotechnology and biomedical applications. Understanding thermal transport and temperature control with JNP heating is critical for these advances. Here, we developed a numerical framework to analyze the asymmetric thermal transport in JNP heating under photothermal stimulation. We found that JNP-induced temperature contrast, defined as the ratio of temperature increase in the surrounding water, shows a substantial size and polar angle dependence. Notably, we discovered a significant enhancement of the temperature contrast under pulsed heating due to thermal confinement, compared with the continuous heating. This work brings new insights into the thermal responses of JNP heating and advances the field. Comment: 5 figures in the main text, and 9 figures in the supporting information
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.17270 Zobrazit plný text záznamu View this record from Arxiv