A novel method for synthesis of colloidal silver nanoparticles by arc discharge in liquid

作者：Ashkarran Ali Akbar^*

来源：Current Applied Physics, 2010, 10(6): 1442-1447.

DOI：10.1016/j.cap.2010.05.010

• Arc discharge
• Silver nanoparticles
• Liquid media
• Optical properties

This paper presents a novel, inexpensive and one-step approach for synthesis of silver nanoparticles (Ag NPs) using arc discharge between titanium electrodes in AgNO(3) solution. The resulting nanoparticles were characterized using UV-Vis spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Silver nanoparticles of 18 nm diameter were formed during reduction of AgNO(3) in plasma discharge zone. Optical absorption spectroscopy of as prepared samples at 15 A arc current in AgNO(3) solution shows a surface plasmon resonance around 410 nm. It was found that sodium citrate acts as a stabilizer and surface capping agent of the colloidal nanoparticles. SEM images exhibit the increase of reduced nanoparticles in 6 min arc duration compared with 1 min arc duration. TEM image of the sample prepared at 6 min arc duration shows narrow size distribution with 18 nm mean particle size. Antibacterial activities of silver nanoparticles were investigated at the presence of Escherichia coli (E-coli) bacteria.

• 出版日期2010-11