Adsorption of Silver Nanoparticles on Modified Surfaces

Abstract:

Uniform films of silver nanoparticles (Ag NPs) were fabricated by self-assembly on 3-aminopropyltriethoxysilane (APTES) and [3-(2-aminoethyl) aminopropyl] trimethoxysilane (AEAPTES) modified glass slides. A stable Ag NPs suspension was synthesized via the reduction of silver nitrate using sodium citrate. Bulk characteristics of Ag NPs in aqueous solution were carried out by measuring their absorption spectrum, morphology and particle shape using the UV-vis absorption spectroscopy and transmission electron microscopy (TEM), respectively. The average diameter of Ag NPs is about 50 nm. The coverage of adsorbed particles on the modified glasses was measured by scanning electron microscopic imaging (SEM). The SEM images indicate that the Ag NPs films on the glasses are uniform. It is supposed that the adsorption processes are mainly controlled by electrostatic interactions. The adsorption amount of Ag NPs on APTES modified glass slides is much more than the amount on AEAPTES modified glass slides.

• Periodical: Key Engineering Materials (Volumes 645-646)
• Pages: 75-79
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.645-646.75
• Online since: May 2015
• Authors: Can Gao, Tan Guo, Xiu Shen Ye, Hui Fang Zhang, Hai Ning Liu*, Zhi Jian Wu
• Keywords: Adsorption, Modified Surfaces, Silver Nanoparticle

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