Micelle-directed chiral seeded growth on anisotropic gold nanocrystals
Por:
González-Rubio G., Mosquera J., Kumar V., Pedrazo-Tardajos A., Llombart P., Solís D.M., Lobato I., Noya E.G., Guerrero-Martínez A., Taboada J.M., Obelleiro F., MacDowell L.G., Bals S., Liz-Marzán L.M.
Publicada:
1 ene 2020
Resumen:
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. © 2020 American Association for the Advancement of Science. All rights reserved.
Filiaciones:
González-Rubio G.:
Basque Research and Technology Alliance (BRTA), Cic BiomaGUNE, Donostia-San Sebastián, 20014, Spain
Mosquera J.:
Basque Research and Technology Alliance (BRTA), Cic BiomaGUNE, Donostia-San Sebastián, 20014, Spain
Kumar V.:
Basque Research and Technology Alliance (BRTA), Cic BiomaGUNE, Donostia-San Sebastián, 20014, Spain
Pedrazo-Tardajos A.:
Electron Microscopy for Materials Research (EMAT), University of Antwerp, Antwerp, 2020, Belgium
Llombart P.:
Departamento de Química Física, Universidad Complutense de Madrid, Madrid, 28040, Spain
Instituto de Química Física Rocasolano, Csic, Madrid, E-28006, Spain
Solís D.M.:
Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States
Lobato I.:
Electron Microscopy for Materials Research (EMAT), University of Antwerp, Antwerp, 2020, Belgium
Noya E.G.:
Instituto de Química Física Rocasolano, Csic, Madrid, E-28006, Spain
Guerrero-Martínez A.:
Departamento de Química Física, Universidad Complutense de Madrid, Madrid, 28040, Spain
Taboada J.M.:
Departamento de Tecnologiá de Los Computadores y de Las Comunicaciones, University of Extremadura, Cáceres, 10003, Spain
Obelleiro F.:
Departamento de Teoriá de la Senãl y Comunicaciones, University of Vigo, Vigo, 36310, Spain
MacDowell L.G.:
Departamento de Química Física, Universidad Complutense de Madrid, Madrid, 28040, Spain
Bals S.:
Electron Microscopy for Materials Research (EMAT), University of Antwerp, Antwerp, 2020, Belgium
Liz-Marzán L.M.:
Basque Research and Technology Alliance (BRTA), Cic BiomaGUNE, Donostia-San Sebastián, 20014, Spain
Basque Foundation for Science, Ikerbasque, Bilbao, 48013, Spain
Ciber de Bioingenieriá, Biomateriales y Nanomedicina (CIBER-BBN), Donostia-San Sebastián, 20014, Spain
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