A5029135599- Spectroscopy and Quantum Chemical Studies
- Luminescence Properties of Advanced Materials
- Perovskite Materials and Applications
- Protein Structure and Dynamics
- Radiation Detection and Scintillator Technologies
- Organic Light-Emitting Diodes Research
- Material Dynamics and Properties
- Photochemistry and Electron Transfer Studies
- Quantum, superfluid, helium dynamics
- Dark Matter and Cosmic Phenomena
- Quantum Dots Synthesis And Properties
- Antenna Design and Analysis
- Semiconductor Lasers and Optical Devices
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Analytical Chemistry and Sensors
- Organic Electronics and Photovoltaics
- Thermodynamic properties of mixtures
- Advanced NMR Techniques and Applications
- Luminescence and Fluorescent Materials
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
University of Milano-Bicocca
2014-2025
Roma Tre University
1999-2017
National Interuniversity Consortium for the Physical Sciences of Matter
2009
Universitat Politècnica de València
2003
University of Pavia
2002-2003
Halide perovskite nanocrystals (NCs) are promising solution-processed emitters for low-cost optoelectronics and photonics. Doping adds a degree of freedom their design enables us to fully decouple absorption emission functions. This is paramount luminescent solar concentrators (LSCs) that enable fabrication electrode-less windows building-integrated photovoltaic applications. Here, we demonstrate the suitability manganese-doped CsPbCl3 NCs as reabsorption-free large-area LSCs. Light...
Abstract Ternary I‐III‐VI 2 nanocrystals (NCs), such as CuInS , are receiving attention heavy‐metals‐free materials for solar cells, luminescent concentrators (LSCs), LEDs, and bio‐imaging. The origin of the optical properties NCs however not fully understood. A recent theoretical model suggests that their characteristic Stokes‐shifted long‐lived luminescence arises from structure valence band (VB) predicts distinctive behaviours in defect‐free NCs: quadratic dependence radiative decay rate...
Abstract Energy sustainability and interconnectivity are the two main pillars on which cutting‐edge architecture is based require realization of energy intelligent devices that can be fully integrated into buildings, capable meeting stringent regulatory requirements operating in real‐world conditions. Luminescent solar concentrators, particularly those near‐infrared emitting reabsorption‐free quantum dots, considered good candidates for semi‐transparent photovoltaic glazing, but despite...
By combining neutron diffraction and Monte Carlo simulations, we have determined the microscopic structure of hydration ions shell in aqueous solutions MgCl2 CaCl2, along with radial distribution functions solvent. In particular cations, show cation specific symmetry, due to strong directional interaction water oxygens. The their shells likely form molecular moieties bring clear signatures water-water functions. Apart from these signatures, influence divalent salts on is similar that...
Hybrid devices employing organic semiconductors interfaced with an aqueous solution represent a new frontier in bioelectronics and energy applications. Understanding of the energetics photoinduced processes occurring at organic/water interface is fundamental for further progress. Here, we investigate interfacial electronic structure poly-3-hexylthiophene (P3HT) sandwiched between indium tin oxide (ITO) electrode liquid water electrolyte. The found to polarize polymer outermost layers, which...
Organic light emitting diodes (OLEDs) operating in the near-infrared spectral region are gaining growing relevance for emerging photonic technologies, such as lab-on-chip platforms medical diagnostics, flexible self-medicated pads photodynamic therapy, night vision and plastic-based telecommunications. The achievement of efficient electroluminescence from solution-processed OLEDs is, however, an open challenge due to low photoluminescence efficiency most narrow-energy-gap organic emitters....
The solvation shell of the hydroxyl ion in water is explored experimentally for first time by using a combination neutron diffraction with hydrogen isotope substitution and Monte Carlo simulation within empirical potential structure refinement framework. data are compatible presence nonplanar bonded (H9O5)− complexes. fifth molecule hydration ion, weakly hydrogen-bonded to site also revealed. (H7O4)− complexes, which have been suggested ab initio simulations promote proton transfer, not...
In the Deep Underground Neutrino Experiment (DUNE), VUV LAr luminescence is collected by light trap devices named X-Arapuca, sizing (480x93) mm2. Six thousand of these units will be deployed in first DUNE ten kiloton far detector module. this work we present characterization photon detection efficiency an X-Arapuca device (200x75) mm2 via a complete and accurate set measurements along cell longitudinal axis with movable 241-Am source. The MPPCs photosensors are readout cryogenic...
The design of next-generation calorimeters for accelerator-borne experiments at the intensity frontier poses unprecedented challenges with regard to timing performance and radiation resistance, while rivaling current state art in terms energy resolution. A significant role may be played by quantum dots, i.e., light-emitting semiconductor nanocrystals high yield rather easy manufacture. Quantum dots can cast into an optically transparent polymer matrix obtain nanocomposite scintillators,...
Efficiency and emission rate are two traditionally conflicting parameters in radiation detection, achieving their simultaneous maximization can significantly advance ultrafast time-of-flight (ToF) technologies. In this study, it is demonstrated that goal attainable by harnessing the giant oscillator strength (GOS) inherent to weakly confined perovskite nanocrystals, which enables superradiant scintillation under mildly cryogenic conditions align seamlessly with ToF It shown radiative...
Abstract Fluorescent concentrators (FCs) have been recently proposed as optical condensers for visible light communications (VLC) and wireless communication (OWC) receivers, with advantages over conventional stages in terms of gain field view (FoV). However, the use FC‐based receivers real‐world scenarios is hampered by need large resilience involved chromophores to sunlight exposure, availability large‐area FC substrates suitable optochemical properties. This paper presents an innovative...
Using the technique of hydrogen and deuterium substitution, structure water in concentrated NaOH solution (10 M) is explored. It found that major changes occur both liquid phase at T=300 K glassy T=173 K. In particular 4.4 Å peak OO pair correlation function pure water, which normally viewed as indicating tetrahedral short-range coordination totally absent room temperature, shows up only a small feature state. Corresponding OH HH functions: The bond position shifted from 1.85 to 1.65 for...
The results of a neutron diffraction experiment performed on aqueous solutions KSCN are analyzed and discussed in comparison with similar data for KCl KOH solutions. effect the different ions structure water differences similarities among ion solvation shells detail. In particular it is shown that visible as shift broadening second peak oxygen-oxygen radial distribution function, which corresponds to lower number interstitial molecules, compared pure water. hydration shell cation found case...
Small conjugated molecules (SM) are gaining momentum as an alternative to semiconducting polymers for the production of solution‐processed bulk heterojunction (BHJ) solar cells. The major issue with SM‐BHJs is low carrier mobility due scarce control on phase‐segregation process and consequent lack preferential percolative pathways electrons holes extraction electrodes. Here, a new paradigm fine tuning in SM‐BHJs, based post‐deposition exploitation latent hydrogen bonding binary mixtures PCBM...
Intracellular pH is a key parameter in many biological mechanisms and cell metabolism used to detect monitor cancer formation brain or heart diseases. pH‐sensing typically performed by fluorescence microscopy using pH‐responsive dyes. Accuracy limited the need for quantifying absolute emission intensity living samples. An alternative with higher sensitivity precision uses probes ratiometric response arising from different pH‐sensitivity of two channels single emitter. Current are complex...
Glucose and mannose have a different degree of sweetness, implying affinity to the sweet taste receptor. While receptor structure is still undefined, there are several geometrical models for their binding mechanism. A detailed study hydration sugars with known sweetness bound provide information on accuracy such models. Our neutron diffraction glucose show that both α- β-glucose form strong hydrogen bonds water, steric hindrance first shell matches model. The α-anomer has similar,...
We have investigated the dielectric properties, as a function of frequency and temperature, hydrated globular protein lysozyme. A large data set made up by measurements performed with conventional capacitance bridge broadband apparatus on same sample has allowed us to identify two dispersions. The main dispersion is due migrating protons along hydrogen bonded water molecules adsorbed surface. dynamics these charges many analogies that proton glasses other glass forming materials. Remarkably,...
There has been much interest in the analogies between dynamic processes proteins and other complex systems such as viscous liquids glasses. We have investigated dynamics of protons along chains hydrogen-bonded water molecules adsorbed on surface globular protein lysozyme. The hydration dependence dielectric relaxation time is fitted by a modified Vogel-Fulcher-Tamman equation, which variable temperature replaced with hydration. find that diverges at singular coincides critical content...