Publications by authors named "Lesly V Melendez"
Metal nanoparticles can photosensitize two-dimensional metal oxides, facilitating their electrical connection to devices and enhancing their abilities in catalysis and sensing. In this study, we investigated how individual silver nanoparticles interact with two-dimensional tin oxide and antimony-doped indium oxide using electron energy loss spectroscopy (EELS). The measurement of the spectral line width of the longitudinal plasmon resonance of the nanoparticles in absence and presence of 2D materials allowed us to quantify the contribution of chemical interface damping to the line width.
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- A new composite material has been developed that combines silver nanoparticles with three-dimensional organic cages made of light-absorbing porphyrins, which help stabilize the particles and capture small molecules.
- The interaction between the porphyrins and the silver nanoparticles enhances energy transfer, with time-resolved spectroscopy showing up to 37% of excited energy being transferred to the porphyrin layer.
- This innovative setup significantly improves the efficiency of photoelectrochemical water-splitting processes and shows potential for future applications in photocatalysis and sensing.
Herein we report the synthesis and characterization of spinel copper gallate (CuGaO) nanocrystals (NCs) with an average size of 3.7 nm via a heat-up colloidal reaction. CuGaO NCs have a band gap of ∼2.
View Article and Find Full Text PDFPlasmon-induced energy and charge transfer from metal nanostructures hold great potential for harvesting solar energy. Presently, the efficiencies of charge-carrier extraction are still low due to the competitive ultrafast mechanisms of plasmon relaxation. Using single-particle electron energy loss spectroscopy, we correlate the geometrical and compositional details of individual nanostructures to their carrier extraction efficiencies.
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