Different surface properties of l-arginine functionalized silver nanoparticles and their influence on the conductive and adhesive properties of nanosilver films

Abstract

The green synthesis of silver nanoparticles using L-arginine as protective and reductive agent has been investigated with -silver nitrate and silver acetate as silver precursors-by a facile and environmentally benign ''singlestep one-pot approach''. Silver nanoparticles synthesized from silver nitrate and silver acetate were named AgNP-1 and AgNP-2, respectively. AgNP-1 and AgNP-2 have similar morphology and size distribution, and both are water dispersible and ultra-stable. However, the nanosilver films made by the two kinds of conductive inks showed very distinct conductive and adhesive properties. FT-IR and X-ray photoelectron spectroscopy were used to characterize the surface properties of silver nanoparticles-the bonding types between silver nanocrystal and L-argininewhich were closely related to the conductive and adhesive properties of nanosilver films. Besides, the probable complexation mechanism of Ag ions with L-arginine and their subsequent reduction to Ag nanoparticles were studied. Finally, stable aqueous nanosilver dispersion with concentration of 20 wt% was produced to fabricate patterns by blade coating. The resistivity of nanosilver films sintered at 170°C for 60 min is 3.8 lX cm and its adhesion can reach 4A, which facilitate their use in printed electronics.

ZnO nanosheet-assisted immobilization of Ag nanoparticles on graphene/Ni foam for highly efficient reduction of 4-nitrophenol

“…An aqueous solution of arginine-silver complexes was prepared using the following process. 44 AgNO 3 (1 mmol) was dispersed in 30 ml of deionized water and 0.4 mmol arginine was dispersed in 20 ml of deionized water (adjusted to pH 11 by adding NaOH). Aer the solid had dissolved adequately, the arginine solution was added dropwise into the AgNO 3 solution, and a small amount of white precipitate was produced.…”