Autor segons l'article: Ni B; Mychinko M; Gómez-Graña S; Morales-Vidal J; Obelleiro-Liz M; Heyvaert W; Vila-Liarte D; Zhuo X; Albrecht W; Zheng G; González-Rubio G; Taboada JM; Obelleiro F; López N; Pérez-Juste J; Pastoriza-Santos I; Cölfen H; Bals S; Liz-Marzán LM
Departament: Química Física i Inorgànica
Autor/s de la URV: Lopez Alonso, Nuria / Morales Vidal, Jordi
Paraules clau: amino-acid chiral seeded growth plasmonic optical activity shape control twisted nanoparticles wulff construction Au nanorods Chiral seeded growth Metal nanoparticles Plasmonic optical activity Twisted nanoparticles Wulff construction
Resum: A robust and reproducible methodology to prepare stable inorganic nanoparticles with chiral morphology may hold the key to the practical utilization of these materials. An optimized chiral growth method to prepare fourfold twisted gold nanorods is described herein, where the amino acid cysteine is used as a dissymmetry inducer. Four tilted ridges are found to develop on the surface of single-crystal nanorods upon repeated reduction of HAuCl4, in the presence of cysteine as the chiral inducer and ascorbic acid as a reducing agent. From detailed electron microscopy analysis of the crystallographic structures, it is proposed that the dissymmetry results from the development of chiral facets in the form of protrusions (tilted ridges) on the initial nanorods, eventually leading to a twisted shape. The role of cysteine is attributed to assisting enantioselective facet evolution, which is supported by density functional theory simulations of the surface energies, modified upon adsorption of the chiral molecule. The development of R-type and S-type chiral structures (small facets, terraces, or kinks) would thus be non-equal, removing the mirror symmetry of the Au NR and in turn resulting in a markedly chiral morphology with high plasmonic optical activity.
Àrees temàtiques: Astronomia / física Chemistry, multidisciplinary Chemistry, physical Engenharias ii Engenharias iii Engenharias iv General materials science Interdisciplinar Materiais Materials science Materials science (all) Materials science (miscellaneous) Materials science, multidisciplinary Mechanical engineering Mechanics of materials Medicina ii Nanoscience & nanotechnology Nanoscience and nanotechnology Physics, applied Physics, condensed matter Química
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: jordi.morales@estudiants.urv.cat nuria.lopez@urv.cat
Data d'alta del registre: 2024-09-21
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://onlinelibrary.wiley.com/doi/10.1002/adma.202208299
Referència a l'article segons font original: Advanced Materials. 35 (1):
Referència de l'ítem segons les normes APA: Ni B; Mychinko M; Gómez-Graña S; Morales-Vidal J; Obelleiro-Liz M; Heyvaert W; Vila-Liarte D; Zhuo X; Albrecht W; Zheng G; González-Rubio G; Taboada J (2023). Chiral Seeded Growth of Gold Nanorods Into Fourfold Twisted Nanoparticles with Plasmonic Optical Activity. Advanced Materials, 35(1), -. DOI: 10.1002/adma.202208299
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI de l'article: 10.1002/adma.202208299
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2023
Tipus de publicació: Journal Publications