Title: Investigation of the influence of different surfactants on controlling the size of silver nanoparticles

Authors: Dung My Thi Dang; Chien Mau Dang; Eric Fribourg-Blanc

Addresses: Laboratory for Nanotechnology, Vietnam National University, Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam ' Laboratory for Nanotechnology, Vietnam National University, Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam ' CEA-LETI, MINATEC Campus, 17, rue des Martyrs, 38054 Grenoble Cedex 9, France

Abstract: In this study, silver nanoparticles were synthesised from silver nitrate via a polyol method in ambient atmosphere. In our synthesis route, polyvinyl pyrrolidone (PVP) and Tween20 were used as capping agents and their effect studied on controlling the size of Ag nanoparticles while ethylene glycol and ethanol were both used as solvent and reducing agent. The obtained silver nanoparticles were characterised by ultraviolet-visible spectrophotometry which indicated the formation of nanoparticles. Transmission electron microscopy (TEM) contributed to the particle size analysis. The surface plasmon resonance peak observed in the absorption spectra of the silver colloidal solutions showed absorption from 410 nm to 420 nm in PVP and from 426 nm to 433 nm in Tween20. It was observed that both PVP and Tween20 are capable of complexing and stabilising Ag nanoparticles formed through the reduction of Ag+ ions. In the case of ethylene glycol, it has been shown that the use of PVP leads to solutions with highly concentrated silver nanoparticles.

Keywords: silver nanoparticles; polyol synthesis; PVP; Tween20; surfactants; particle size; nanotechnology; silver nitrate; ethylene glycol; ethanol.

DOI: 10.1504/IJNT.2015.067908

International Journal of Nanotechnology, 2015 Vol.12 No.5/6/7, pp.505 - 514

Available online: 08 Mar 2015 *

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