| Full text | |
| Author(s): |
Pereira, Richard Silveira
;
Ferreira, Diego Lourenconi
;
de Oliveira, Gabriel Ferrari
;
de Paula, Gabriele C. Felipe
;
Romero, Andre Luisdos dos Santos
;
Mendonca, Cleber Renato
;
Vivas, Marcelo Goncalves
Total Authors: 7
|
| Document type: | Journal article |
| Source: | ACS APPLIED NANO MATERIALS; v. N/A, p. 13-pg., 2025-04-11. |
| Abstract | |
The growing demand for portable electronics has driven advancements in micro- and nanoscale technologies. In this regard, plasmonic nanomaterials are particularly notable for their capacity to manipulate surface plasmons, enabling applications in super-resolution microscopy, optical nanosensors, cancer therapy, and high-resolution displays, among other fields. This work aims to control the size, concentration, density, and shape anisotropy of gold nanoparticles (AuNPs) while generating plasmonic platforms in poly(methyl methacrylate) (PMMA) films, controlling the laser power and translation speed during the direct laser writing technique. The nucleation and growth processes of AuNPs in PMMA films were explained using the laser-induced plasma classical model. Using a computational method based on the Mie-Gans approach, we identified nanoparticles with diameters ranging from 2 to 30 nm, concentrations varying from 0.9 mu M to 1.9 mM, aspect ratio values between 1.1 and 1.5, and density like the bulk gold and plasmonic microstructures with widths spanning from 5 to 70 mu m. Additionally, areas of the film with the highest nanoparticle density were mapped using rhodamine B fluorescence, which varied according to laser power. The results demonstrate that gold nanoparticles can be generated with high precision in polymers at a micrometer resolution with high chemical stability, making this technique versatile and cost-effective compared to traditional methods. (AU) | |
| FAPESP's process: | 18/11283-7 - Nonlinear photonics: spectroscopy and advanced processing of materials |
| Grantee: | Cleber Renato Mendonça |
| Support Opportunities: | Research Projects - Thematic Grants |