Publications by authors named "Andre Nascimento Barbosa"
Article Synopsis
- * Density functional theory (DFT) calculations indicate negative binding energies for these metal ions on the heterostructures, confirmed by Surface Plasmon Resonance (SPR) spectroscopy, which measures strong binding in water according to a Langmuir isotherm model.
- * Among the metal ions tested, mercury (Hg) displays the highest affinity and sensitivity, with impressive detection limits, and results suggest that electron transfer plays a crucial role in enhancing the performance of SPR sensors in detecting heavy metal ions.
Submicron long focusing range beams are gaining attention due to their potential applications, such as in optical manipulation, high-resolution lithography and microscopy. Here, we report on the theoretical and experimental characterization of an elastomeric polydimethylsiloxane/single layer graphene (PDMS/SLG) axicon-like tunable device, able to generate diffraction-resistant submicrometric spots in a pump and probe configuration. The working principle is based on the phase change of an input Gaussian beam induced in the elastomer via the thermo-optical effect, while the heating power is produced by the optical absorption of the SLG.
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