| Texto completo | |
| Autor(es): |
Hernandez-Sarria, Jhon James
;
Oliveira Jr, Osvaldo N.
;
Mejia-Salazar, Jorge Ricardo
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS APPLIED NANO MATERIALS; v. N/A, p. 8-pg., 2023-01-18. |
| Resumo | |
The manipulation of molecules placed in close proximity to a liquid is crucial for understanding their interactions, as in the study of antibiotics against bacteria. This can, in principle, be realized with plasmonic optical tweezers, but the heating of metals leads to the denaturing of biomolecules. In this work, we demonstrate that slotted all-dielectric nanodisks made of amorphous silicon (a-Si) exhibit double-well optical potentials, which can be used to stably trap dielectric nanoparticles with radii as small as 15 nm using infrared wavelengths where there is no optical loss (no heating) for a-Si. The latter is important to avoid heating the surrounding environment, which in turn, generates fluid convection currents that would compromise optical trapping. The trapping of one and two nanoparticles (even with different morphologies) in water is demonstrated in numerical results for an all-dielectric nanostructure, which can be obtained with standard materials and nanofabrication methods. The trapping forces are only slightly affected by the morphology of the small dielectric nanoparticles, thus indicating that the trapping approach may be applied to a variety of biomolecules. (AU) | |
| Processo FAPESP: | 17/25587-5 - Projeto numérico de pinças ópticas nanofotônicas totalmente dielétricas para manipulação sem perdas de pequenas nanopartículas |
| Beneficiário: | Jhon James Hernández Sarria |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 18/22214-6 - Rumo à convergência de tecnologias: de sensores e biossensores à visualização de informação e aprendizado de máquina para análise de dados em diagnóstico clínico |
| Beneficiário: | Osvaldo Novais de Oliveira Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 22/14229-9 - Projeto e Desenvolvimento de Metassuperfícies Flexíveis para Aplicações em Biossensoriamento e Telecomunicações |
| Beneficiário: | Osvaldo Novais de Oliveira Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Brasil |