Preparation of Acrylate-Stabilized Gold and Silver Hydrosols and Gold−Polymer Composite Films

Abstract

Gold and silver nanoparticles were prepared by reducing aqueous solutions of the respective metal salts with sodium acrylate (SA), which also acts as capping agent. Gold nanoparticles were also prepared using poly(sodium acrylate) (PSA) with various molecular weights (2100, 5100, 15 000, and 30 000 g/mol). These polymers act as both reducing and stabilizing agents for the gold nanoparticles. Gold nanoparticles formed using SA are nearly spherical and have a narrow size distribution (11−17 nm). These particles are similar in size and stability to those formed by the conventional citrate reduction method. PSA-stabilized gold nanoparticles are somewhat less uniform in size but also highly stable. The polymer-stabilized gold particles can be used to form composite polymer films with optical properties that depend on the volume fraction of gold.

Photochemically reduced polyoxometalate assisted generation of silver and gold nanoparticles in composite films: a single step route

“…2). The pink-violet composite film exhibited a band at 520 nm, characteristic of Au nanoparticles [28]. These observations clearly demonstrate that the reduced composite film was able to reduce metal ions into metal nanoparticles, which is evidenced from the surface plasmon bands of Ag, Au nanoparticles.…”

Aqueous synthesis and characterization of Ag and Ag–Au nanoparticles: addressing challenges in size, monodispersity and structure

“…Figure 1a shows the TEM image of the as-synthesized Ag NPs capped by the acrylate molecule. The particle size distribution is 20.5 ± 3.3 nm (16% deviation), which represents a significant improvement in the monodispersity of these particles at this size over other preparation techniques, for example those prepared by Hussain et al (2003), which were polydisperse in the range of 18-40 nm, or those prepared by Panacek et al (2006), which were polydisperse in the range of 25-50 nm. Also, we were able to achieve an increase in size over other Ag particles prepared by some traditional techniques, for example those prepared by Taleb et al (1997) of 4.1 ± 0.5 nm size, or those prepared by Lin et al (2003) of 10.9 ± 1.7 nm size, while simultaneously keeping the particle monodispersity high.…”

Synthesis of Gold Nanoparticles Stabilized in Dextran Solution by Gamma Co-60 Ray Irradiation and Preparation of Gold Nanoparticles/Dextran Powder

“…Synthetic polymers typically polyvinyl alcohol [1], polyvinyl pyrrolidone [2,3], polyethylene glycol [4], sodium polyacrylate [5,6], and surfactants [7,8] have been commonly used as stabilizers in the bottom-up approach of synthesis of gold nanoparticles (AuNPs). In addition, biopolymers such as chitosan [9][10][11], alginate [12,13], hyaluronan [14,15], gum arabic [16,17], protein [18,19], gelatin [20], dextran [21], and glucomannan [22] have been also used as stabilizers of colloidal AuNPs solution.…”