Publications by authors named "Danil A Kurshanov"
Carbon dots can be used for the fabrication of colloidal multi-purpose complexes for sensing and bio-visualization due to their easy and scalable synthesis, control of their spectral responses over a wide spectral range, and possibility of surface functionalization to meet the application task. Here, we developed a chemical protocol of colloidal complex formation via covalent bonding between carbon dots and plasmonic metal nanoparticles in order to influence and improve their fluorescence. We demonstrate how interactions between carbon dots and metal nanoparticles in the formed complexes, and thus their optical responses, depend on the type of bonds between particles, the architecture of the complexes, and the degree of overlapping of absorption and emission of carbon dots with the plasmon resonance of metals.
View Article and Find Full Text PDFLead halide perovskite nanoplatelets (NPls) attract significant attention due to their exceptional and tunable optical properties. Doping is a versatile strategy for modifying and improving the optical properties of colloidal nanostructures. However, the protocols for B-site doping have been rarely reported for 2D perovskite NPls.
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- Heavy metal ions, which don't biodegrade and can pollute natural resources, are highly toxic even in small amounts and pose health risks.
- This research explores using colloidal luminescent semiconductor quantum dots (QDs) combined with superparamagnetic nanoparticles to create a sensitive optical sensor for detecting toxic heavy metal ions like Co, Ni, and Pb.
- The study shows that the sensor can accurately detect these metals in water at very low concentrations (as low as ≈0.01 ppm) and highlights the advantage of using a magnetic field to easily extract the sensors from solutions for analysis.
The understanding of the physical mechanisms of the nanoobjects interaction within the nanostructured complex materials is one of the main tasks for the development of novel materials with tunable properties. In this work, we develop a formation procedure of the colloidal complexes based on alloyed CdZnSe/ZnS quantum dots and gold nanoparticles where the various mercaptocarboxylic acids are used as the binding molecules. The QD photoluminescence enhancement (up to ×3.
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- Scientists have created a new type of material using tiny particles called quantum dots (QDs) that can glow and could help make better sensors.
- They made this material look like a flower with a lot of holes, which helps it work better in detecting things like gases.
- This study shows how changing the way QDs come together can make different shapes and improve tools that use light, potentially leading to really cool new gadgets!