Directional Self-Assembly of Nanoparticles Coated with Thermoresponsive Block Copolymers and Charged Small Molecules
- 주제(기타) Polymer Science
- 설명문(일반) [Kim, Ga-Hyun; Kim, Minji; Hyun, Jerome K.; Park, So-Jung] Ewha Womans Univ, Dept Chem & Nanosci, 52 Ewhayeodae Gil, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000208952
- 본문언어 영어
- Published As https://doi.org/10.1021/acsmacrolett.3c00221
- PubMed 37399507
초록/요약
Herein, we report the directional stimuli-responsiveself-assemblyof gold nanoparticles (AuNPs) coated with a thermoresponsive blockcopolymer (BCP), poly(ethylene glycol)-b-poly(N-isopropylacrylamide) (PEG-b-PNIPAM) andcharged small molecules. AuNPs modified with PEG-b-PNIPAM possessing a AuNP/PNIPAM/PEG core/active/shell structureundergo temperature-induced self-assembly into one-dimensional (1D)or two-dimensional (2D) structures in salt solutions, with the morphologyvarying with the ionic strength of the medium. Salt-free self-assemblyis also realized by modulating the surface charge by the codepositionof positively charged small molecules; 1D or 2D assemblies are formeddepending on the ratio between the small molecule and PEG-b-PNIPAM, consistent with the trend observed with the bulksalt concentration. A series of charge-controlled self-assembly atvarious conditions revealed that the temperature-induced BCP-mediatedself-assembly reported here provides an effective means for on-demanddirectional self-assembly of nanoparticles (NPs) with controlled morphology,interparticle distance, and optical properties, and the fixation ofhigh-temperature structures.
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