Plasma-liquid electrochemistry: Rapid synthesis of colloidal metal nanoparticles by microplasma reduction of aqueous cations

被引:286
作者
Richmonds, Carolyn [1 ]
Sankaran, R. Mohan [1 ]
机构
[1] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA
关键词
D O I
10.1063/1.2988283
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate operation of an aqueous electrochemical cell with an atmospheric-pressure microplasma cathode and a solid metal anode for the rapid production of colloidal metal nanoparticles. Microplasmas are miniaturized versions of low-pressure glow discharges that operate nonthermally at high pressures (similar to 1 atm) and contain energetic electrons. Aqueous metal cations are directly reduced by electrons in the microplasma without the presence of a solid cathode or chemical reducing agents. Kinetic studies performed by UV-visible absorbance spectroscopy suggest that particle nucleation and growth are coupled to redox reactions initiated in the electrochemical cell through plasma-liquid interactions. (C) 2008 American Institute of Physics.
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页数:3
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