Data / Hora
Date(s) - 31/08/2023
17:00 - 18:00
Categorias
Pulsed laser ablation of gold in water for the fixation of CO2 into advanced functional nanomaterial
Prof. Tommaso Del Rosso (e-mail: tommaso@puc-rio.br)
Departamento de Física, PUC-Rio
31 de agosto – 5ª. Feira – 17h – sala L776
The CO2 reduction reaction is up today exploited for the synthesis of value-added feed-stocks in gaseous or liquid form [1]. Here we report an example of CO2 reduction reaction leading to the production of advanced functional nanomaterial by the use of pulsed laser ablation of a gold target in water. The presence of CO2 derivatives in water during the ablation process, leads to C2 and C3 coupling with the production of organic material with the typical fingerprint of the CO2 reduction reaction. Using a novel pump and probe configuration for the pulsed laser driven CO2 reduction reaction, we are able to obtain ultra-small AuNPs (d < 3 nm ) and photoluminescent metal-organic nanocomposites with a quantum-yield of the about 23% in the blue spectral region [2]. The CO2 reduction reaction controls also the biological effects of the produced nanomaterial in endothelial colony forming cells, with the possibility to switch from anti-angiogenic to pro-angionenic regulators. In the latter case, the biomolecular signaling indicates the ability to behave as carbon monoxide releasing gold nanoparticles, inducing a strong pro-angiogenic activity, demonstrated by both in vitro and in vivo experiments.
The authors acknowledge CAPES, CNPq and FAPERJ for the support.
[1] F. Creutzig et Al., “The mutual dependence of negative emission technologies and energy systems”, Energy Environ. Sci., 2019,12, 1805-1817
[2] A.R Ziefuss et Al., “Photoluminescence of Fully Inorganic Colloidal Gold Nanocluster and Their Manipulation Using Surface Charge Effects”, Adv. Mater. 2021, 2101549