4.7 Article

Asymmetric Incorporation of Silver Nanoparticles in Polymeric Assemblies by Coassembly of Tadpole-Like Nanoparticles and Amphiphilic Block Copolymers

期刊

MACROMOLECULAR RAPID COMMUNICATIONS
卷 42, 期 20, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100354

关键词

asymmetric localization; nanoparticles; self-assembly; star polymers

资金

  1. National Natural Science Foundation of China [51603166, 21774099]
  2. Science and Technology Agency of Shaanxi Province [2016KW-050, 2018KW-008, 2018KWZ-03]
  3. 111 Project 2.0 of China [BP2018008]

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This study demonstrates a general approach to asymmetrically localize tadpole-like silver nanoparticles (NPs) in larger polymeric nanostructures through coassembly, providing a new strategy for NP fabrication and offering opportunities for off-center distribution of NPs in hybrid assemblies.
A general approach to asymmetrically localize nanoparticles (NPs) in larger polymeric nanostructures is demonstrated by coassembly of tadpole-like silver NPs (AgNPs) and amphiphilic block copolymers (BCPs). The tadpole-like AgNPs are prepared by template synthesis using a tailor-made A(BC)(20) star polymer, namely poly(ethylene glycol)[poly(acrylic acid)-block-polystyrene](20) [PEG(PAA-b-PS)(20)], as template resulting in AgNPs decorated with twenty short PS chains and one long PEG chain, named Ag@PEG(PS)(20). The asymmetric distribution of these AgNPs in various polymeric nanostructures, e.g., spherical micelles, cylindrical micelles, vesicles, and sponge phase, is achieved via coassembly of the as-prepared Ag@PEG(PS)(20) and PEG-b-PS in solution driven by the anisotropic nature of the Ag@PEG(PS)(20). This report not only provides a new strategy for the fabrication of tadpole-like NPs but also offers opportunity for off-center distributing NPs in hybrid assemblies, which may find applications in, e.g., sensing, catalysis, and diagnostics.

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