Publications by authors named "Eva Y Santiago"
Nanoparticles (NPs) can be conjugated with diverse biomolecules and employed in biosensing to detect target analytes in biological samples. This proven concept was primarily used during the COVID-19 pandemic with gold-NP-based lateral flow assays (LFAs). Considering the gold price and its worldwide depletion, here we show that novel plasmonic NPs based on inexpensive metals, titanium nitride (TiN) and copper covered with a gold shell (Cu@Au), perform comparable to or even better than gold nanoparticles.
View Article and Find Full Text PDFNanoparticles (NPs) can be conjugated with diverse biomolecules and employed in biosensing to detect target analytes in biological samples. This proven concept was primarily used during the COVID-19 pandemic with gold NPs-based lateral flow assays (LFAs). Considering the gold price and its worldwide depletion, here we show that novel plasmonic nanoparticles (NPs) based on inexpensive metals, titanium nitride (TiN) and copper covered with a gold shell (Cu@Au), perform comparable or even better than gold nanoparticles.
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- Core-shell gold-silver cuboidal nanoparticles were created with either concave or straight facets and showed significant changes when incubated with low concentrations of chiral l-glutathione (GSH).
- The interaction of GSH with the nanoparticles led to unique UV plasmonic extinction and induced circular dichroism (CD) peaks, indicating a sensitive dependency on the thickness of the silver shell.
- GSH molecules altered the distribution of silver in the nanoparticles, enhancing plasmonic CD effects especially in concave-shaped nanocuboids compared to those with straight facets.
Article Synopsis
- Nanoscale research on photocatalytic systems is important for better understanding and improving their design and functionality.
- A new photochemical nanoscopy technique allows precise detection of molecular products at the nanoscale during photocatalytic reactions driven by plasmonic hot-carriers.
- The findings indicate that smaller, denser gold nanoparticle arrays exhibit lower optical contributions, with peak efficiency observed at the plasmon peak, and a detailed investigation reveals localized areas of oxidation and reduction reactions in single plasmonic nanodiodes.
Chirality is a fundamental feature in all domains of nature, ranging from particle physics over electromagnetism to chemistry and biology. Chiral objects lack a mirror plane and inversion symmetry and therefore cannot be spatially aligned with their mirrored counterpart, their enantiomer. Both natural molecules and artificial chiral nanostructures can be characterized by their light-matter interaction, which is reflected in circular dichroism (CD).
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