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A Gallium-Based Magnetocaloric Liquid Metal Ferrofluid
Nano Letters ( IF 9.6 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1021/acs.nanolett.7b04050 Isabela A. de Castro 1 , Adam F. Chrimes 1 , Ali Zavabeti 1 , Kyle J. Berean 1 , Benjamin J. Carey 1 , Jincheng Zhuang 2 , Yi Du 2 , Shi X. Dou 2 , Kiyonori Suzuki 3 , Robert A. Shanks 4 , Reece Nixon-Luke 5 , Gary Bryant 5 , Khashayar Khoshmanesh 1 , Kourosh Kalantar-zadeh 1 , Torben Daeneke 1
Nano Letters ( IF 9.6 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1021/acs.nanolett.7b04050 Isabela A. de Castro 1 , Adam F. Chrimes 1 , Ali Zavabeti 1 , Kyle J. Berean 1 , Benjamin J. Carey 1 , Jincheng Zhuang 2 , Yi Du 2 , Shi X. Dou 2 , Kiyonori Suzuki 3 , Robert A. Shanks 4 , Reece Nixon-Luke 5 , Gary Bryant 5 , Khashayar Khoshmanesh 1 , Kourosh Kalantar-zadeh 1 , Torben Daeneke 1
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We demonstrate a magnetocaloric ferrofluid based on a gadolinium saturated liquid metal matrix, using a gallium-based liquid metal alloy as the solvent and suspension medium. The material is liquid at room temperature, while exhibiting spontaneous magnetization and a large magnetocaloric effect. The magnetic properties were attributed to the formation of gadolinium nanoparticles suspended within the liquid gallium alloy, which acts as a reaction solvent during the nanoparticle synthesis. High nanoparticle weight fractions exceeding 2% could be suspended within the liquid metal matrix. The liquid metal ferrofluid shows promise for magnetocaloric cooling due to its high thermal conductivity and its liquid nature. Magnetic and thermoanalytic characterizations reveal that the developed material remains liquid within the temperature window required for domestic refrigeration purposes, which enables future fluidic magnetocaloric devices. Additionally, the observed formation of nanometer-sized metallic particles within the supersaturated liquid metal solution has general implications for chemical synthesis and provides a new synthetic pathway toward metallic nanoparticles based on highly reactive rare earth metals.
中文翻译：
镓基磁热液态金属铁磁流体
我们展示了基于saturated饱和液态金属基体的磁热铁磁流体，使用镓基液态金属合金作为溶剂和悬浮介质。该材料在室温下为液体，同时表现出自发磁化和大的磁热效应。磁性能归因于悬浮在液态镓合金中的nanoparticles纳米颗粒的形成，liquid纳米颗粒在纳米颗粒合成过程中起反应溶剂的作用。超过2％的高纳米颗粒分数可以悬浮在液态金属基质中。液态金属铁磁流体因其高导热性和液态特性而有望用于磁热冷却。磁性和热分析特性表明，所开发的材料在家用制冷所需的温度范围内仍保持液态，这使将来的流体磁热装置成为可能。此外，观察到的过饱和液态金属溶液中纳米级金属颗粒的形成对化学合成具有一般意义，并为基于高反应性稀土金属的金属纳米颗粒提供了一条新的合成途径。
更新日期：2017-11-08
中文翻译：
镓基磁热液态金属铁磁流体
我们展示了基于saturated饱和液态金属基体的磁热铁磁流体，使用镓基液态金属合金作为溶剂和悬浮介质。该材料在室温下为液体，同时表现出自发磁化和大的磁热效应。磁性能归因于悬浮在液态镓合金中的nanoparticles纳米颗粒的形成，liquid纳米颗粒在纳米颗粒合成过程中起反应溶剂的作用。超过2％的高纳米颗粒分数可以悬浮在液态金属基质中。液态金属铁磁流体因其高导热性和液态特性而有望用于磁热冷却。磁性和热分析特性表明，所开发的材料在家用制冷所需的温度范围内仍保持液态，这使将来的流体磁热装置成为可能。此外，观察到的过饱和液态金属溶液中纳米级金属颗粒的形成对化学合成具有一般意义，并为基于高反应性稀土金属的金属纳米颗粒提供了一条新的合成途径。
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