Investigation of different nanoparticles for magnetophoretically enabled nanofin heat sinks in microfluidics
Investigation of different nanoparticles for magnetophoretically enabled nanofin heat sinks in microfluidics
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DOI：
10.1039/c3lc51331a
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发表时间：
2014-01-01
期刊：
影响因子：
6.1
通讯作者：
Kalantar-zadeh, Kourosh
中科院分区：
文献类型：
--
作者：
Yi, Pyshar;Khoshmanesh, Khashayar;Kalantar-zadeh, Kourosh
组装的纳米翅片散热器是最近引入的一个新概念，它是在冷却微流控中通过外力形成的纳米结构，可以从热点中散热。在这项工作中，我们研究了由CrO_2和Fe_2O_3磁性纳米颗粒形成的纳米鳍状结构，并比较了它们的性能。热成像用于比较三种情况，包括：(I)去离子水作为冷却液，(Ii)磁性粒子在去离子水中悬浮，以及(Iii)磁性粒子在磁场存在的情况下在去离子水中悬浮。对于每种情况，分别在10、40和120亩L闽(-1)三种不同的流速下进行实验。我们的结果表明，由CrO2组成的纳米翅片的高导热系数显著地增强了微通道的热交换。该概念验证系统可以为未来紧凑型电子产品的散热提供一种实用的解决方案。
Assembled nanofin heat sinks, nanostructures which are formed via external forces in a cooling microfluidic to remove heat from hot spots, are a new concept that has recently been introduced. In this work, we investigate nanofin structures formed by CrO2 and Fe2O3 magnetic nanoparticles and compare their performance. Thermal imaging is used for comparison of three cases including: (i) DI water as the coolant liquid, (ii) suspension of magnetic particles in DI water, and (iii) suspension of magnetic particles in DI water in the presence of a magnetic field. For each case, the experiments are conducted at three different flow rates of 10, 40 and 120 mu l min(-1). Our results suggest that the high thermal conductivity of the nanofins composed of CrO2 significantly enhances the heat exchange across the microchannel. The proof-of-concept magnetophoretic system can offer a practical solution for the cooling of future compact electronics.