Surface Plasmon Enhanced Thermal Properties of Noble Metallic Nanofluids

被引：4

作者：

Lee, Kwang Hong ^{[1
]}

Low, Swee Ling ^{[1
]}

Lim, Geok Kieng ^{[2
]}

Wong, Chee Cheong ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[2] Def Sci Org, Natl Labs, Def Med & Environm Res Inst, Singapore 117510, Singapore

来源：

ADVANCED SCIENCE LETTERS | 2010年 / 3卷 / 02期

关键词：

CONDUCTIVITY; SUSPENSIONS; MODEL;

D O I：

10.1166/asl.2010.1095

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We explore here the possible contribution of surface optical properties to the thermal properties of metallic nanofluids During temperature ramping of a gold nanofluid model system, measured Surface Plasmon Resonance (SPR) is found to correlate with Thermal Conductivity Enhancement (TCE) of the nanofluid The depth of the SPR dip in reflectivity spectrum is indicative of the strength of excited SPR and this varies proportionally with the temperature of the nanofluid With an increase in temperature, the SPR strength increases with a corresponding increase in the TCE However, when the strength of the resonance starts to decrease, the TCE starts to increase at a decreasing rate This correlation of SPR to ICE is the strongest in nanofluids with a low concentration of nanoparticles This mechanism of thermal enhancement is most likely attributable to the high surface area to volume ratio of the nanoparticles, and should be operative in other metallic nanoparticle suspensions as well

引用

页码：149 / 153

页数：5

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