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Ethylene and phenylene bridged polysilsesquioxanes functionalized by amine and thiol groups as adsorbents of volatile organic compounds
2007
Abstract Ethylene and phenylene bridged polysilsesquioxane xerogels having amine and thiol groups attached to the surface have been obtained by the sol–gel method from 1,2-bis(triethoxysilyl)ethane or 1,4-bis(triethoxysilyl)benzene and functionalized silanes in the presence of an ammonium fluoride catalyst in an ethanol solution. The synthesized samples have a porous structure (700–850 m2/g) and a high content of functional groups (1.4–1.9 mmol/g). The obtained porous bridged polysilsesquioxanes exhibit a considerable affinity for adsorbing several organic compounds (n-hexane, n-heptane, benzene, cyclohexane, acetonitrile and triethylamine) from the gas phase. The sample with an ethylene br…
Etica sociale, riconoscimento e ragione pubblica
2020
Il nesso tra etica e futuro è apparso sempre come centrale nella storia del pensiero morale. Ma ecco che, all’improvviso, questo futuro non sembra più garantito e appare come una dimensione che sfugge del tutto a ciò che per tanto tempo si è pensato intorno a norme, valori, relazioni, vincoli, responsabilità. La domanda su quale sarà l’etica nel futuro, su come dobbiamo immaginarla nel contesto di un mondo ancora da venire, eppure già imminente e alle porte, non è motivata soltanto dalla curiositas, ma ci è imposta soprattutto dai rapidi e radicali cambiamenti – sul piano scientifico, tecnologico, sociale, economico – che caratterizzano la nostra epoca e mutano profondamente la fisionomia d…
A new and controversial scenario in the gathering of evidence at the European level: The proposal for a directive on the European investigation order
2014
In April 2010 a group of EU Member States proposed a Directive on the European Investigation Order, an instrument which, if adopted, will significantly change the way in which evidence is gathered at the EU level. After the failure of the EEW, which focused on the exchange of evidence which had already been gathered, the objective of the new text is to create a single instrument for obtaining all kinds of evidence located in another Member State. The aim of this paper is to examine, within the current framework, the suitability of this new instrument, with particular reference to its impact on the rights of defendants.
Evanescent wave-initiated photopolymerisation as a new way to create monolithic open-tubular capillary columns: use as enzymatic microreactor for on-…
2010
Evanescent wave-initiated photopolymerisation in an optically wave guiding PTFE-coated fused silica capillary using light-emitting diode as a light source, is established here as a way to fabricate monolithic porous layer open-tubular capillary columns with a potential in capillary separation methods; application of the obtained open-tubular columns as enzymatic microreactors for on-line protein digestion is demonstrated.
The Large Observatory for X-ray Timing (LOFT)
2012
High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultra-dense matter and to black hole masses and spins. A 10 m^2-class instrument in combination with good spectral resolution is required to exploit the relevant diagnostics and answer two of the fundamental questions of the European Space Agency (ESA) Cosmic Vision Theme "Matter under extreme conditions", namely: does matter orbiting close to the event horizon follow the predictions of general relativity? What is the equation of state of matter in neutron stars? The Large Observatory For X-ray Timing (LOFT), selected by ESA as one of the four Cosmic Vision M…
Taking Advantage of Selective Change Driven Processing for 3D Scanning
2013
This article deals with the application of the principles of SCD (Selective Change Driven) vision to 3D laser scanning. Two experimental sets have been implemented: one with a classical CMOS (Complementary Metal-Oxide Semiconductor) sensor, and the other one with a recently developed CMOS SCD sensor for comparative purposes, both using the technique known as Active Triangulation. An SCD sensor only delivers the pixels that have changed most, ordered by the magnitude of their change since their last readout. The 3D scanning method is based on the systematic search through the entire image to detect pixels that exceed a certain threshold, showing the SCD approach to be ideal for this applicat…
Colloidal Nanoplatelet/Conducting Polymer Hybrids: Excitonic And Material Properties
2016
WOS:000370678700053 Here we present the first account of conductive polymer/colloidal nanoplatelet hybrids. For this, we developed DEH-PPV-based polymers with two different anchor groups (sulfide and amine) acting as surfactants for CdSe nanoplatelets, which are atomically flat semiconductor nanocrystals. Hybridization of the polymers with the nanoplatelets in the solution phase was observed to cause strong photoluminescence quenching in both materials. Through steady-state photoluminescence and excitation spectrum measurements, photoluminescence quenching was shown to result from dominant exciton dissociation through charge transfer at the polymer/nanoplatelet interfaces that possess a sta…
The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators.
2021
AbstractWe study the joint effect of disorder and Coulomb interaction screening on the exciton spectra in two-dimensional (2D) structures. These can be van der Waals structures or heterostructures of organic (polymeric) semiconductors as well as inorganic substances like transition metal dichalcogenides. We consider 2D screened hydrogenic problem with Rytova–Keldysh interaction by means of so-called fractional Scrödinger equation. Our main finding is that above synergy between screening and disorder either destroys the exciton (strong screening) or promote the creation of a bound state, leading to its collapse in the extreme case. Our second finding is energy levels crossing, i.e. the degen…
Topology driven g-factor tuning in type-II quantum dots
2017
We investigate how the voltage control of the exciton lateral dipole moment induces a transition from singly to doubly connected topology in type-II InAs/GaAsxSb1−x quantum dots. The latter causes visible Aharonov-Bohm oscillations and a change of the exciton g factor, which are modulated by the applied bias. The results are explained in the frame of realistic →k⋅→p and effective Hamiltonian models and could open a venue for new spin quantum memories beyond the InAs/GaAs realm.
Exequias de Felipe IV en Nápoles: la exaltación dinástica a través de un programa astrológico
1991
LA BELLEZA DE LOS LIBROS DE EXEQUIAS ITALIANOS DEL PERIODO BARROCO ES BIEN CONOCIDA. BUEN EXPONENTE DE ELLO ES LA CRONICA ILUSTRADA DE LAS HONRAS FUNEBRES NAPOLITANAS DE FELIPE IV. TEXTO E IMAGENES REVELAN UNO DE LOS MAS IMPRESIONANTES PROYECTOS EFIMEROS DEL SIGLO XVII, EN EL QUE SE DESARROLLA UN PROGRAMA ASTROLOGICO CUYA BASE IDEOLOGICA ES LA EXALTACION DE LA CASA DE AUSTRIA, A TRAVES DE EMBLEMAS Y ALEGORIAS. (A. B.C./ L.A.G.)