AI Article Synopsis
- The study investigates how different segments of poly(ethylene oxide)-containing block copolymers (PEO-BCP) influence the reduction of tetrachloride gold(III), as well as the stability and morphology of formed gold nanoparticles in water.
- The researchers found that the reduction activity of various PEO-BCP types followed a specific order, indicating that the presence of amino groups and specific polymer structures affects how well they can reduce gold ions.
- Among the tested polymers, the amino-terminated variant showed the highest colloidal stability and produced the smaller gold nanoparticles compared to other formulations, highlighting the importance of polymer design in controlling nanoparticle properties.
Article Abstract
We report here on the segment effects of poly(ethylene oxide)-containing block copolymers (PEO-BCP) on the reduction activity for tetrachloride gold(III) ([AuCl(4)](-)), interfacial activity for gold surface, colloidal stability, and morphology of gold nanoparticles formed in aqueous solutions. In particular, the effects of poly(ethylene oxide) (PEO), poly(propylene oxide) (PPO), polyethylene (PE) segments and amino group (NH(2)) on the rate of [AuCl(4)](-) reduction, adsorption of PEO-BCP onto gold surface, colloidal stability, and morphology of gold nanoparticles formed in aqueous solutions were examined using a poly(ethylene oxide)-poly(propylene oxide) triblock copolymer (PEO-PPO-PEO, Pluronic L44), an amino-terminated poly(ethylene oxide)-poly(propylene oxide) block copolymer (PEO-PPO-NH(2), SURFONAMINE® L-207), a poly(ethylene oxide) homopolymer (PEO, poly(ethylene glycol)2000), and a polyethylene-poly(ethylene oxide) block copolymer (PE-PEO). We found that the reduction activity of PEO-BCP for [AuCl(4)](-) became higher with the order of PEO-PPO-NH(2)
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http://dx.doi.org/10.1016/j.jcis.2012.12.003 DOI Listing Publication Analysis
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