Publications by authors named "Andrea Fratelli"
The recent emergence of quantum-confined nanomaterials in the field of radiation detection, in particular lead halide perovskite nanocrystals, offers scalability and performance advantages over conventional materials. This development raises fundamental questions about the mechanism of scintillation itself at the nanoscale and the role of particle size, arguably the most defining parameter of quantum dots. Understanding this is crucial for the design and optimization of future nanotechnology scintillators.
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- - The study describes a method for creating blue-emitting, stable cube-shaped CsPbBr quantum dots (QDs) through a slow dissolution-recrystallization process, starting from pre-synthesized (K-Cs)PbBr nanocrystals.
- - Unlike previous methods that yield larger, green-emitting nanocrystals in seconds, this process takes hours and allows for size tuning by varying precursor concentrations.
- - The QDs show optical properties with excitonic features tunable from 420 to 452 nm, exhibit a quantum yield of around 60%, and their fine structure and Auger recombination effects align with theoretical predictions, as confirmed by detailed spectroscopic analysis.