Research Papers

Universal scaling behavior of the temperature increase of a heat nanoparticle on a substrate

[+] Author Affiliations
Weichun Zhang, Qiang Li, Lijun Meng, Ding Zhao

Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zheda Road 38, Hangzhou 310027, China

Min Qiu

Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zheda Road 38, Hangzhou 310027, China

KTH Royal Institute of Technology, School of Information and Communication Technology, Electrum 229, Kista 16440, Sweden

J. Nanophoton. 9(1), 093046 (Oct 23, 2015). doi:10.1117/1.JNP.9.093046
History: Received June 11, 2015; Accepted September 16, 2015
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Abstract.  Knowledge of temperatures at the nanoscale is essential for studying and controlling the heat-induced local thermal responses. The temperature rise of a heated nanoparticle (NP) near the interface of two kinds of media with different thermal conductivities is numerically investigated. We find that the temperature rise becomes size independent if it is scaled by the temperature rise in the case where the particle-interface distance is zero and the distance is scaled by the equivalent radius of the NP. This universal scaling behavior can be understood with the principle of dimensional homogeneity. An empirical equation is retrieved to predict the actual particle temperature at a given position. Our results may benefit precise control of heat at the nanoscale with applications in plasmonic absorbers, immunotargeted photothermal cancer cell killing, etc.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Weichun Zhang ; Qiang Li ; Lijun Meng ; Ding Zhao and Min Qiu
"Universal scaling behavior of the temperature increase of a heat nanoparticle on a substrate", J. Nanophoton. 9(1), 093046 (Oct 23, 2015). ; http://dx.doi.org/10.1117/1.JNP.9.093046


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