초음속 노즐을 이용한 금속 나노 입자의 생성에서 이온 핵의 영향

Abstract

Synthesis of silver nanoparticles by the supersonic nozzle expansion method with corona discharge ions was investigated. Corona discharge ions functioned as seeds for heterogeneous nucleation in the silver nanoparticles formation process and provided silver nanoparticles with electronic repulsive force that prevents aggregation of the particles. For ion ejecting, we used sonic-jet corona discharger. Upon application of the corona discharge ions, the mean diameter of the produced particles was decreased from 12.54 to 6.22㎚ and the standard deviation was decreased from 5.02 to 3.34㎚. In addition, the agglomeration of silver nanoparticles was reduced.