| Full text | |
| Author(s): |
Hernandez-Sarria, Jhon James
;
Oliveira Jr, Osvaldo N.
;
Mejia-Salazar, Jorge Ricardo
Total Authors: 3
|
| Document type: | Journal article |
| Source: | ACS APPLIED NANO MATERIALS; v. N/A, p. 8-pg., 2023-01-18. |
| Abstract | |
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) | |
| FAPESP's process: | 17/25587-5 - Numerical design of all-dielectric nanophotonic optical tweezers for lossless manipulation of small nanoparticles |
| Grantee: | Jhon James Hernández Sarria |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis |
| Grantee: | Osvaldo Novais de Oliveira Junior |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 22/14229-9 - Design and Development of Flexible Metasurfaces for Biosensing and Telecommunications Applications |
| Grantee: | Osvaldo Novais de Oliveira Junior |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - Brazil |