Crafting Nanostructured Hybrid Block Copolymer–Gold Nanoparticles by Confined Self-Assembly in Evaporative Droplets
DOKPE
- Escher, Andrea University of Genoa, Italy
- Bravetti, Gianluca ORCID University of Fribourg
- Bertucci, Simone ORCID University of Genoa, Italy
- Comoretto, Davide ORCID University of Genoa, Italy
- Weder, Christoph ORCID University of Fribourg
- Steiner, Ullrich ORCID University of Fribourg
- Lova, Paola ORCID University of Genoa, Italy
- Dodero, Andrea ORCID University of Fribourg
- 2024
Published in:
- ACS Macro Letters. - Washington, D.C., US: American Chemical Society (ACS). - 2024, vol. 13, p. 1338-1344
English
Hybrid organic−inorganic nanostructures offersignificant potential for developing advanced functional materialswith numerous technological applications. However, the fabrica-tion process is often tedious and time-consuming. This studypresents a facile method for fabricating block copolymer-basedphotonic microspheres incorporating plasmonic gold nanopar-ticles. Specifically, the confined self-assembly of poly(styrene)-b-poly(2-vinylpyridine) in emulsion droplets allows the formation ofspherical, noniridescent, concentric lamellar structures, i.e., onion-like particles that are subsequently infiltrated with gold salt. Usingethanol as a preferential solvent allows the loading of metal ionsexclusively into the poly(2-vinylpyridine) domains, which aresubsequently reduced, leading to the in situ, spatially controlled formation of gold nanoparticles. The hybrid structures exhibit a well-defined photonic bandgap and plasmonic resonance at low gold concentrations. These results demonstrate the feasibility offabricating optically active photonic structures comprising metal nanoparticles in a block copolymer array via a simple two-stepfabrication process.
- Faculty
- Faculté des sciences et de médecine
- Department
- AMI - Physique de la matière molle
- Language
-
- English
- Classification
- Chemistry
- License
-
CC BY
- Open access status
- hybrid
- Identifiers
-
- DOI 10.1021/acsmacrolett.4c00519
- ISSN 2161-1653
- Persistent URL
- https://folia.unifr.ch/unifr/documents/329500
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