이온 핵이 주입된 초음속 노즐 팽창법에 의한 하전된 은 나노입자의 생성

Abstract

The synthesis of charged silver nanoparticles by a supersonic nozzle expansion method with ion nuclei was investigated. In order to supply ions in the developed nanoparticles generator, sonic-jet corona discharger was used as an ionizer. Corona discharge ions function as seeds for heterogeneous nucleation in the silver nanoparticle formation process and provide silver nanoparticles with a repulsive electrical force that prevents aggregation of the particles. For detailed analysis of generated nanoparticles properties such as size, morphology, composition and charge, sampled nanoparticles have been investigated by means of transmission electron microscope, X-ray diffraction analysis, energy dispersive spectroscopy and Faraday cup current measurement. Upon application of the corona discharge ions, the mean diameter and standard deviation of the produced particles decrease. And, charged and non-agglomerated silver nanoparticles can be synthesized.