RT Journal Article
T1 Chiral seeded growth of gold nanorods into fourfold twisted nanoparticles with plasmonic optical activity
A1 Ni, Bing
A1 Mychinko, Mikhail
A1 Gómez Graña, Sergio
A1 Morales Vidal, Jordi
A1 Obelleiro Liz, Manuel
A1 Heyvaert, Wouter
A1 Vila Liarte, David
A1 Zhuo, Xiaolu
A1 Albrecht, Wiebke
A1 Zheng, Guangchao
A1 González Rubio, Guillermo
A1 Taboada, José M.
A1 Obelleiro Basteiro, Fernando
A1 López, Nuria
A1 Pérez Juste, Jorge
A1 Pastoriza Santos, Isabel
A1 Cölfen, Helmut
A1 Bals, Sara
A1 Liz Marzán, Luis Manuel
K1 2307 Química Física
AB 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.
PB Advanced Materials
SN 09359648
YR 2023
FD 2023-01
LK http://hdl.handle.net/11093/6695
UL http://hdl.handle.net/11093/6695
LA eng
NO Advanced Materials, 35(1): 2208299 (2023)
NO Agencia Estatal de Investigación | Ref. PID2019-108954RB-I00
DS Investigo
RD 18-mar-2025