Seminar given by Guillermo González Rubio, from Universidad Complutense de Madrid
Gold nanocrystals are intriguing materials due to their strong interactions with light, which vary according to the nanocrystal shape and size. This unique property makes them highly suitable for cancer diagnosis and treatment applications, optical devices, and photocatalysis. Anisotropic gold nanorods, in particular, are especially attractive due to their ability to exhibit tunable and narrow extinction bands in the visible and near-infrared regions, depending on their volume and length-to-width ratio. In this presentation, I will discuss various methods for producing high quality gold nanorod colloids, focusing on surfactant-assisted seed-mediated growth routes and the application of pulsed laser irradiation to control size, morphology, and purity. We will explore essential concepts such as symmetry breaking, anisotropic growth, and the reshaping of nanocrystals through laser excitation, examining how different experimental factors impact the quality of the resulting colloids. I will also highlight recent advancements in the in-situ characterization of gold nanorod seeds, crucial for gaining insights into symmetry breaking mechanisms. The talk will conclude with a demonstration of the potential of gold nanorods as precursors for synthesizing complex anisotropic nanostructures combining various noble metals. References G. González-Rubio et al. Femtosecond laser reshaping yields gold nanorods with ultranarrow surface plasmon resonances. Science. 2017, 358, 640–644. G. González-Rubio et al. Disconnecting Symmetry Breaking from Seeded Growth for the Reproducible Synthesis of High Quality Gold Nanorods. ACS Nano. 13, 2019, 4424–4435. G. González-Rubio et al. Micelle-directed chiral seeded growth on anisotropic gold nanocrystals. Science. 368, 2020, 1472–1477. G. González-Rubio et al. Surfactant-Assisted Symmetry Breaking in Colloidal Gold Nanocrystal Growth. ChemNanoMat. 2020, 6, 698–707. G. González-Rubio et al. Revisiting the Role of Seed Size for the Synthesis of Highly Uniform Sub-10 nm Length Gold Nanorods. Chem. Mat. 2024, 36, 4, 1982–1997.
Ponente del seminario: Guillermo González Rubio
Fecha del seminario: 13/02/2025 08:30
Lugar del seminario: Salón de Actos del IQF
