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For the reduction of 4-nitrophenol to 4-aminophenol, gold nanoparticles (AuNPs) below 10 nm have high catalytic activity. However, AuNPs in aqueous solution or organic solvents are not stable in the absence of stabilizers. Here, we describe polyion complex (PIC) micelles as the stabilizer to prepare highly dispersed AuNPs for the first time. The preparation route is very gentle, easy, and reproducible...
Polyion complex (PIC) micelles were prepared by self-assembly of block-graft polycation monomethoxy poly(ethylene glycol)-block-(poly(ε-caprolactone)-graft-polyethylenimine) (PEG-b-(PCL-g-PEI)) and hyperbranched polyanion sodium carboxyl-modified hyperbranched polyesters (Hx-COONa, x = 20, 30, 40). The results from commonly used MTT assay indicated that PIC micelles had good biocompatibility. PIC...
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