Polycrystalline copper nanoparticles were synthesized from copper chloride dihydrate solution using the liquid phase plasma
reduction method. A bipolar pulsed power supply with tungsten electrodes was used to generate discharge in the aqueous solutions.
While large size of dendrite-shaped copper nanoparticles were mostly observed in the initial stage and particle size decreased with discharge
time. The particles were dispersed with less and less small particles by the addition of CTAB and anisotropic shapes nanoparticles
were mostly observed at long time plasma-treated with high concentration of surfactant. Many spots could be seen in the selected area
diffraction pattern (SADP) for polycrystalline particles.
Keywords: Bipolar pulsed discharge, copper, liquid phase plasma, nanoparticle, surfactant.
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