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Keywords:

  • aggregation;
  • amphiphiles;
  • block copolymers;
  • gold;
  • nanostructures

Graphical Abstract

Thumbnail image of graphical abstract

Hybrid gold–polymer nanoparticles are obtained by self-assembly of amphiphilic poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymers in solutions containing preformed gold nanoparticles (see schematic). Gold nanoparticles are individually embedded within globules of polymer (see TEM image), even under conditions for which polymer micelles do not form in solution.

Abstract

Hybrid gold–polymer nanoparticles are obtained by self-assembly of amphiphilic copolymers (Pluronics) in solutions containing preformed gold nanoparticles (diameter ca. 12 nm). Dynamic light scattering, TEM, cryo-TEM, and small-angle neutron scattering experiments with contrast variation are used to characterize the structure of the gold–polymer particles. Five Pluronics (F127, F68, F88, F108, P84) with different molecular weights and hydrophilic/hydrophobic balances are investigated. Gold nanoparticles are individually embedded within globules of polymer, even under conditions for which Pluronics micelles do not form in solution. The hybrid particles are several tens of nanometers in size (larger than micelles of the corresponding Pluronics), and the size can be tuned by changing the temperature.