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- W2156637238 abstract "We report that poly(L-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG) copolymers that bear multiple thiol groups on the polymer backbone are exceptional ligands for gold nanoparticles (AuNPs). In general, these graft copolymer ligands stabilize AuNPs against environments that would ordinarily lead to particle aggregation. To characterize the effect of copolymer structure on AuNP stability, we synthesized thiolated PLL-g-PEGs (PLL-g-[PEG:SH]) with different backbone lengths, PEG grafting densities, and number of thiols per polymer chain. AuNPs were then combined with these polymer ligands, and the stabilities of the resulting AuNP@PLL-g-[PEG:SH] particles against high temperature, oxidants, and competing thiol ligands were characterized using dynamic light scattering, visible absorption spectroscopy, and fluorescence spectrophotometry. Our observations indicate that thiolated PLL-g-PEG ligands combine thermodynamic stabilization via multiple Au-S bonds and steric stabilization by PEG grafts, and the best graft copolymer ligands balance these two effects. We hope that this new ligand system enables AuNPs to be applied to biotechnological applications that require harsh experimental conditions." @default.
- W2156637238 created "2016-06-24" @default.
- W2156637238 creator A5039606329 @default.
- W2156637238 creator A5090030371 @default.
- W2156637238 date "2012-11-27" @default.
- W2156637238 modified "2023-10-14" @default.
- W2156637238 title "Oligothiol Graft-Copolymer Coatings Stabilize Gold Nanoparticles against Harsh Experimental Conditions" @default.
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- W2156637238 doi "https://doi.org/10.1021/la301249a" @default.
- W2156637238 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3682508" @default.
- W2156637238 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22957513" @default.
- W2156637238 hasPublicationYear "2012" @default.
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