Abstract
Several methods have been offered for silver nanoparticles production. A new method has been developed including shape-controlled synthesis of silver nanoparticles in different shapes. Dendrite, cubic, spherical and porous structures were formed by self-arrangement of the surfactant as a template under ultrasound radiation. In order to produce silver particles, ascorbic acid has been used to reduce an aqueous solution of silver nitrate in the presence of dodecylbenzenesulfonic acid sodium salt, poly (vinyl pyrrolidinone), and a mixture of organic and aqueous solutions. Scanning electron microscopy and transmission electron microscopy analysis revealed that the morphology and the size of produced particles were influenced by the type of capping agent, presence of ultrasound radiation, and crystallization time. In order to measure the surface roughness of dendrite and porous particles, an optical reflectometer was used. Surfactant molecules in an aqueous solution can aggregate in different shapes depending on temperature, ionic property of solution, time, and aprotic solvent content.
Highlights
In recent years, much attention has been paid to metallic nanoparticles due to their potential in catalytic, biologic, and electronic applications (Murphy 2002; Huang and Murray 2001; Kamat 2002; Zhang 2003; Rosi and Mirkin 2005; Daniel and Astruc 2004; Morones et al 2005; Elechiguerra et al 2005)
Scanning electron microscopy and transmission electron microscopy analysis revealed that the morphology and the size of produced particles were influenced by the type of capping agent, presence of ultrasound radiation, and crystallization time
Pure silver nanoparticles have been synthesized via a wet chemical reaction in the presence of capping agent and surfactant under ultrasound radiation
Summary
Much attention has been paid to metallic nanoparticles due to their potential in catalytic, biologic, and electronic applications (Murphy 2002; Huang and Murray 2001; Kamat 2002; Zhang 2003; Rosi and Mirkin 2005; Daniel and Astruc 2004; Morones et al 2005; Elechiguerra et al 2005) Their novel optical, thermal, chemical and physical properties are because of higher surface energy of nanoparticles compared to the bulk solid and short mean free path of an electron in a metal (10–100 nm for many metals at room temperature).
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