Sensitization of SnO2 and ZnO nanostructures by CH3NH3SnCl3 hybrid particles

With the aim of developing metal oxide nanostructures optimally designed to match the physical requirements of their applications, we tried to modify the surface of either ZnO tetrapods and SnO2 nanowires by evaporation of hybrid organic-inorganic self-assembled perovskites (surface sensitization) and investigated the resulting photoluminescence (PL) properties. Film of CH3NH3SnCl3 hybrid perovskite were thermally ablated on either ZnO tetrapods (TP) deposited on quartz substrates [see L Zanotti et al., this conference] or SnO2 nanowires (NW) grown on alumina substrates. By using a shadow mask hybrid was deposited only on one half of the ZnO TP and SnO2 NW substrates, thus leaving bare nanostructures on the other half. PL measurements were performed on the two portions of each substrate by using an excitation wavelength λ=325 nm. We observed that hybrid has negligible effects on the PL spectra of ZnO TP, but significantly modify the PL of SnO2 NWs. Bare SnO2 nanowires in fact show the usual broad featureless PL peak in the 400-600 nm range, while after hybrid deposition the peak shape is strongly modified with a slight red-shift. Since the changes of NW PL do not scale with hybrid thickness, and, on the other hand, the PL efficiency of the hybrid itself is quite modest to justify the phenomenon, we suggest that the observed effect has to be imputed to the formation of interfaces due to the interaction between the nanostructure matrix and hybrid. The mechanisms of such interaction and the consequent PL modification are presently investigated

Strangeness nuclear physics: a critical review on selected topics

Selected topics in strangeness nuclear physics are critically reviewed. This includes production, structure and weak decay of $\Lambda$--Hypernuclei, the $\bar K$ nuclear interaction and the possible existence of $\bar K$ bound states in nuclei. Perspectives for future studies on these issues are also outlined.Comment: 63 pages, 51 figures, accepted for publication on European Physical Journal

Long-range Angular Correlations On The Near And Away Side In P-pb Collisions At √snn=5.02 Tev

7191/Mar294

Centrality Dependence Of The Pseudorapidity Density Distribution For Charged Particles In Pb-pb Collisions At √snn=2.76tev

7264/Mai61062

(Anti-)deuteron production in pp collisions at 1as=13TeV

The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of (anti-)deuterons is studied as a function of the charged particle multiplicity in inelastic pp collisions at s=13 TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (d Nch/ d \u3b7 3c 26) as measured in p\u2013Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p\u2013Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)