Green Formation of Spherical and Dendritic Silver Nanostructures under Microwave Irradiation without Reducing Agent

International Journal of Molecular Sciences

Monir Noroozi²  Azmi Zakaria¹  Mohd Maarof Moksin²  Zaidan Abd Wahab² 

[1] Physics Department, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia;

关键词: microwave;    silver nanostructures;    silver nanoparticles;   

DOI  :  10.3390/ijms13078086

来源: mdpi

【 摘 要 】

The rapid and green formation of spherical and dendritic silver nanostructures based on microwave irradiation time was investigated. Silver nanoparticles were successfully fabricated by reduction of Ag⁺ in a water medium and using polyvinylpyrrolidone (PVP) as the stabilizing agent and without the use of any other reducing agent, and were compared with those synthesized by conventional heating method. UV–vis absorption spectrometry, transmission electron microscopy (TEM), atomic absorption spectroscopy (AAS) and photon correlation spectroscopy (PCS) measurements, indicated that increasing the irradiation time enhanced the concentration of silver nanoparticles and slightly increased the particle size. There was a lack of large silver nanoparticles at a high concentration, but interestingly, the formation and growth of silver dendrite nanostructures appeared. Compared to conventional heating methods, the silver nanoparticle suspension produced by irradiated microwaves was more stable over a six-month period in aqueous solution without any signs of precipitation.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.