Micelle-directed chiral seeded growth on anisotropic gold nanocrystals
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- 26 June 2020
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 368 (6498), 1472-1477
- https://doi.org/10.1126/science.aba0980
Abstract
Surfactant-assisted seeded growth of metal nanoparticles (NPs) can be engineered to produce anisotropic gold nanocrystals with high chiroptical activity through the templating effect of chiral micelles formed in the presence of dissymmetric cosurfactants. Mixed micelles adsorb on gold nanorods, forming quasihelical patterns that direct seeded growth into NPs with pronounced morphological and optical handedness. Sharp chiral wrinkles lead to chiral plasmon modes with high dissymmetry factors (~0.20). Through variation of the dimensions of chiral wrinkles, the chiroptical properties can be tuned within the visible and near-infrared electromagnetic spectrum. The micelle-directed mechanism allows extension to other systems, such as the seeded growth of chiral platinum shells on gold nanorods. This approach provides a reproducible, simple, and scalable method toward the fabrication of NPs with high chiral optical activity.Keywords
Funding Information
- H2020 European Research Council (787510)
- H2020 European Research Council (815128)
- Ministerio de Ciencia, Innovación y Universidades (MDM-2017-0720)
- Ministerio de Ciencia, Innovación y Universidades (FJCI-2015-25080)
- Ministerio de Ciencia, Innovación y Universidades (TEC2017-85376-C2-1-R)
- Ministerio de Ciencia, Innovación y Universidades (TEC2017-85376-C2-2-R)
- Ministerio de Ciencia, Innovación y Universidades (RTI2018-095844-B-I00)
- Red Espa ñola de Supercomputación (QCM-2019-1-0038)
- Red Espa ñola de Supercomputación (QCM-2018-3-0039)
- Ministerio de Ciencia, Innovación y Universidades (FIS2017-89361-C3-2-P)
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