Gold Nanosweepers (AuNSs): A Novel Application of PEGylated AuNPs

Yang, Guohai; Li, Na; Chow, Ho Yin; Xu, Qingyu; Zhang, Huanlin; Ruiz, Jaimé; Lai, Xinchun; Astruc, Didier; Wong, Kwok Yin; Zhao, Pengxiang

doi:10.1246/cl.140964

Cited by 1 publication

(2 citation statements)

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“…The conventional Turkevich approach was used to create the first citrated‐stabilized AuNPs (Au@citrate) 37 . Polyethylene glycol (PEG)‐stabilized Au NPs (Au@PEG) were synthesized by the Yang method 38 . The UV–vis absorption spectra of Au@citrate, Au@PEG, and Au@PEG‐b‐PSEMA are presented in Figure 3b.…”

Section: Resultsmentioning

confidence: 99%

“…37 Polyethylene glycol (PEG)-stabilized Au NPs (Au@PEG) were synthesized by the Yang method. 38 The UV-vis absorption spectra of Au@citrate, Au@PEG, and Au@PEG-b-PSEMA are presented in Figure 3b. In comparison to Au@citrate (λ max = 520), Au@PEG (λ max = 521) and Au@ PEGb-PSEMA (λ max = 525) showed a small red shift of the SPR peak of Au NPs.…”

Section: Stability To Temperature Variation Of Au@peg-b-psemamentioning

confidence: 99%

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Enhanced stability of gold nanoparticles capped with double hydrophilic block copolymers synthesized by eATRP

Liu,

2024

J of Applied Polymer Sci

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In this study, the gold nanoparticles (Au NPs) are capped with a novel, well‐defined double hydrophilic block copolymer, poly (ethylene glycols)‐block‐poly(mono‐2‐(methacryloyloxy) ethyl succinate) (PEG‐b‐PSEMA). The PEG‐b‐PSEMA, with long side chains and relatively narrow dispersity index, is successfully prepared by aqueous electrochemically mediated atom transfer radical polymerization using a PEG‐Br macroinitiator (Mn≈2000 g mol−1). By simply mixing PEG‐b‐PSEMA and Au precursor before adding reductants, coulombic interactions occur between the Au precursor and the carboxylate group of the PSEMA, as a result dense Au NPs are formed. This enables the Au NPs to remain dispersed even in the presence of temperature variations, pH adjustments, and incubation in organic solvents. Au NPs were endowed by PEG‐b‐PSEMA with more remarkable catalytic activity in organic solvents of 4‐nitrophenol into 4‐aminophenol than by sodium citrate (Au@citrate) and MeO‐PEG‐OH (Au@PEG). In addition, PEG‐b‐PSEMA‐stabilized Au NPs (Au@PEG‐b‐PSEMA) were also tested for the dye degradation property against Rhodamine‐B in only pH 10 basic solution, and over 99% of dye degradation can be achieved in 9 min. PEG‐b‐PSEMA induces coulombic interactions with Au NPs, providing outstanding stability for catalytic applications in organic or specific acidic‐base environments.

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Section: Resultsmentioning

confidence: 99%

Section: Stability To Temperature Variation Of Au@peg-b-psemamentioning

confidence: 99%