Synthesis of hollow, magnetic Fe/Ga-based oxide nanospheres using a bubble templating method in a microfluidic system

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• 作者：Chen-Hsun Weng ; Chih-Chia Huang ; Chen-Sheng Yeh ; Huan-Yao Lei and Gwo-Bin Lee
• 关键词：FeGa2O4 ; Microfluidics ; Hollow nanosphere ; Micro ; reactor
• 刊名：Microfluidics and Nanofluidics
• 出版年：2009
• 出版时间：December, 2009
• 年：2009
• 卷：7
• 期：6
• 页码：841-848
• 全文大小：449.6 KB

文摘

This paper describes a new approach to synthesize hollow nanospheres in a microfluidic system using air bubbles as templates. A new microfluidic system which integrates a micro-mixer, a micro-condenser channel, microvalves, a micro-heater, and a micro-temperature sensor, to form an automatic micro-reactor, is used to generate air bubbles that assist in the synthesis of hollow Fe/Ga-based oxide nanospheres. Experimental data show that Fe/Ga-based oxide nanoparticles with a diameter of 157 ¡À 26 nm can be successfully synthesized. The formation mechanism is that the seed nanoparticles are attaching themselves onto the bubbles to form a solid shell. The magnetic properties of the hollow Fe/Ga-based oxide nanospheres are also measured. This may be a promising platform to synthesize hollow nanoparticles for drug delivery applications.