Adrica Kyndiah, Tobias Cramer, Cristiano Albonetti, Fabiola Liscio, Stefano Chiodini, Mauro Murgia, Fabio Biscarini,
Charge transfer at organic‐organic heterojunctions is fundamental to several organic electronics devices, including light‐emitting diodes, photovoltaic cells, light‐emitting transistors, and ambipolar field‐effect transistors. Here, probe charge transfer (CT) processes during the formation of an organic‐organic heterojunction are probed by performing in situ real‐time electrical characterization during the growth of pentacene/C 60 ambipolar transistors. N‐type C 60 channel formation follows two different ...
Tópico(s): Molecular Junctions and Nanostructures
2015 - Wiley | Advanced Electronic Materials
I. Veronese, M.C. Cantone, N. Chiodini, Mauro Fasoli, E. Monès, Federico Moretti, A. Vedda,
The depth-dose-profile and the transversal beam profile of a 6 MV photon beam are measured by means of Eu-doped silica optical fibres. In both cases, a non-negligible influence of the stem effect was observed as consequence of the change in the relative contribution of the Cerenkov light while varying the vertical and lateral position of the fibre. The approach for removing the spurious luminescence signal based on the radioluminescence (RL) spectral analysis proved to be effective and independent ...
Tópico(s): Spectroscopy and Laser Applications
2013 - Elsevier BV | Radiation Measurements
I. Veronese, M.C. Cantone, M. Catalano, N. Chiodini, Mauro Fasoli, Pietro Mancosu, E. Monès, Federico Moretti, Marta Scorsetti, A. Vedda,
Abstract In this study, the spectral emission of Eu 3+ -doped silica optical fibres is investigated under irradiation with photons and electrons of different energies, field sizes and orientations, in order to discover the origin of stem effect and evaluate its influence on the radioluminescence (RL) spectral shape under experimental conditions. A comparison with previously investigated Ce-doped silica fibres is also made. Below the Cerenkov radiation energy threshold, a slight contribution to the ...
Tópico(s): Radiation Dose and Imaging
2012 - Institute of Physics | Journal of Physics D Applied Physics
Federico Moretti, A. Vedda, N. Chiodini, Mauro Fasoli, A. Lauria, Vítězslav Jarý, Romana Kučerková, E. Mihóková, Angeloclaudio Nale, M. Nikl,
Structural and optical properties of sol–gel silica based glassceramics doped with 0.1 mol% Ce and codoped with Gd at high concentrations, from 5 mol% up to 40 mol%, are investigated and compared to those of analogous samples doped only with Ce. Raman scattering, transmission electron microscopy, and x-ray diffraction reveal the formation of Gd apatite-like silicate (Gd4.67O(SiO4)3) and of Gd pyrosilicate (Gd2Si2O7) nanophases whose morphology and crystallinity depend on the Gd concentration and thermal ...
Tópico(s): Mineralogy and Gemology Studies
2011 - Elsevier BV | Journal of Luminescence
E. Mihóková, N. Chiodini, Mauro Fasoli, A. Lauria, Federico Moretti, M. Nikl, Vítězslav Jarý, A. Vedda,
To better understand the scintillation mechanism in ${\text{SrHfO}}_{3}$-based scintillators we investigate in detail their x-ray excited radioluminescence (RL) emissions. The Gaussian decomposition of the undoped ${\text{SrHfO}}_{3}$ RL spectra manifests the presence of four emission bands peaking at 3.0, 4.0, 4.6, and 5.1 eV. Based on corresponding photoluminescence emission and excitation spectra we tentatively associate the observed bands with excitonic or defect-related emissions. When doped by ${\text{ ...
Tópico(s): Luminescence Properties of Advanced Materials
2010 - American Physical Society | Physical Review B
Daniela Di Martino, N. Chiodini, Mauro Fasoli, Federico Moretti, A. Vedda, A. Baraldi, E. Buffagni, R. Capelletti, Margherita Mazzera, M. Nikl, Giuliano Angella, Carlo B. Azzoni,
A thorough study was performed on Gd-doped sol–gel silica glasses, in the concentration range 0–8 mol% Gd. The analyses were carried out as a function of Gd content, before and after a post-densification thermal treatment. Different results concerning optical, vibrational, magnetic, and structural features were gathered in correlated experiments. The presence of Gd-rich nanoclusters was revealed. The size of nanoclusters increases by increasing the dopant concentration and by performing a rapid ...
Tópico(s): Radiation Detection and Scintillator Technologies
2008 - Elsevier BV | Journal of Non-Crystalline Solids
Federico Moretti, N. Chiodini, Mauro Fasoli, L. Griguta, A. Vedda,
We present a study of the optical properties of Gd-doped sol–gel silica glasses densified at different temperatures (from 450 up to 1050 °C) by means of optical absorption (OA) and radio luminescence (RL). The effect of a post-densification rapid thermal treatment (RTT) at approximately 1800 °C is also considered. Room temperature OA and RL measurements have revealed a slight low-energy shift of Gd3+ absorption/emission lines by densification temperature increasing accompanied by a parallel increase of ...
Tópico(s): Lanthanide and Transition Metal Complexes
2006 - Elsevier BV | Journal of Luminescence
Alfredo Scillitani, Vito Guarnieri, Claudia Battista, Simona De Geronimo, Lucia Anna Muscarella, Iacopo Chiodini, Mauro Cignarelli, Salvatore Minisola, Francesco Bertoldo, C M Francucci, Nazzarena Malavolta, Alessandro Piovesan, Maria Lucia Mascia, Silvana Muscarella, Geoffrey N. Hendy, Leonardo D’Agruma, David E.C. Cole,
Three single-nucleotide polymorphisms in the calcium-sensing receptor gene (CASR) encoding the missense substitutions A986S, R990G, and Q1011E have been associated with normal variation in extracellular calcium homeostasis, both individually and in haplotype combination. The aim of this study was to examine haplotype associations in primary hyperparathyroidism (PHPT).Patients with sporadic PHPT (n = 237) were recruited from endocrine clinics and healthy controls (n = 433) from a blood donor clinic, and ...
Tópico(s): Metabolism, Diabetes, and Cancer
2006 - Oxford University Press | The Journal of Clinical Endocrinology & Metabolism
N. Chiodini, Mauro Fasoli, M. Martini, Franca Morazzoni, E. Rosetta, Roberto Scotti, G. Spinolo, A. Vedda, M. Nikl, N. Solovieva, A. Baraldi, R. Capelletti, R. Francini,
Radio-, photo- and thermally stimulated—luminescence (RL, PL, TSL) measurements have been performed on SiO2 sol-gel glasses doped by 0.1 mol% Ce and 3 mol% Gd, and on (0.1 mol% Ce, 3 mol% Gd) co-doped samples. Ce3☎ 5d-4f emission peaking at about 2.7 eV has been observed in the RL of SiO2: 0.1 mol% Ce, while the typical 6P-8S emission of Gd3☎ centred at 3.97 eV has been detected in SiO2: 3 mol% Gd. The co-doped sample displays both 5d-4f Ce3☎ and 6P-8S Gd3☎ emissions with reduced intensities with ...
Tópico(s): Radiation Detection and Scintillator Technologies
2003 - Taylor & Francis | Radiation effects and defects in solids
Edgardo Somigliana, M. Silva Infantino, Massimo Candiani, M. Vignali, Annalisa Chiodini, Mauro Busacca, Mario Vignali,
BACKGROUND: It has been suggested recently that deep endometriosis and the other forms of the disease do not share a common pathogenetic mechanism. In this study, we hypothesize that, if this is true, deep peritoneal endo metriosis and the other forms should not be significantly associated. METHODS: Clinical and surgical records of all women who were referred to the Department of Obstetrics and Gynecology, Clinica 'L.Mangiagalli' between January 1995 and June 2002 and who were diagnosed with deep ...
Tópico(s): Intestinal and Peritoneal Adhesions
2003 - Oxford University Press | Human Reproduction
N. Chiodini, Mauro Fasoli, M. Martini, E. Rosetta, G. Spinolo, A. Vedda, M. Nikl, N. Solovieva, A. Baraldi, R. Capelletti,
We present the effect of a rapid thermal treatment (RTT) at high temperature (1800 °C) on the radio-luminescence properties of Ce-doped SiO2 glasses prepared by the sol–gel method and previously densified at 1050 °C. Cerium concentrations ranging from 0.05 up to 1 mol % were considered. We found that, for all concentrations, the RTT induces a strong increase of the Ce3+ radio-luminescence efficiency; the x-ray-induced luminescence intensity of the SiO2:0.1% Ce is about twice that of Bi3Ge4O12. The decay ...
Tópico(s): Radiation Detection and Scintillator Technologies
2002 - American Institute of Physics | Applied Physics Letters
Massimo Torlontano, Iacopo Chiodini, Mauro Pileri, Giuseppe Guglielmi, M Cammisa, Sergio Modoni, Vincenzo Carnevale, Vincenzo Trischitta, Alfredo Scillitani,
The strategy of treatment for patients with adrenal incidentalomas (AI) may depend upon the presence of hormonal hypersecretion. Although alterations of bone turnover have been recently reported, data on bone mineral density (BMD) are not available in AI patients. We evaluated bone turnover and BMD in 32 female AI patients and 64 matched controls. Spinal and femoral BMD were similar in patients and controls. Serum bone GLA protein (6.8+/-3.5 vs. 8.8+/-3.2 ng/mL; P<0.005) and PTH (48.8+/-15.1 vs. 37. ...
Tópico(s): Hormonal Regulation and Hypertension
1999 - Oxford University Press | The Journal of Clinical Endocrinology & Metabolism
A. Vedda, N. Chiodini, Mauro Fasoli, A. Lauria, Federico Moretti, Daniela Di Martino, A. Baraldi, E. Buffagni, R. Capelletti, Margherita Mazzera, P. Boháček, E. Mihóková,
Transmission electron microscopy, Raman scattering, Fourier transform infrared spectroscopy, and radio-luminescence are employed to investigate rare-earth (RE) incorporation and aggregate formation in silica glasses prepared by the Sol-Gel method and doped with Ce $^{3+}$ , or Tb $^{3+}$ , Gd $^{3+}$ , Yb $^{3+}$ with concentrations up to several mol%. The results demonstrate that rare-earth aggregates with a mean diameter extending up to several tens of nanometers occur, further increasing their size after post-densification ...
Tópico(s): Material Dynamics and Properties
2010 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Nuclear Science
Francesca Cova, M. T. Lucchini, K. Pauwels, E. Auffray, N. Chiodini, Mauro Fasoli, A. Vedda,
The simultaneous readout of photons emitted due to Cherenkov and scintillation processes is a promising feature of SiO${}_{2}$:Ce optical fibers, suggesting applications in innovative radiation sensors for calorimetry in high-energy physics, as well as radiation monitoring in medicine, security, and industrial controls. This study presents a detailed characterization of the scintillation properties of doped silica fibers exposed to high-energy electrons, and demonstrates the feasibility of a simultaneous ...
Tópico(s): Atomic and Subatomic Physics Research
2019 - American Physical Society | Physical Review Applied
R. Assiro, Anna Paola Caricato, G. Chiodini, Mauro Corrado, Mary De Feudis, C. Di Giulio, Gaetano Fiore, L. Foggetta, E. Leonardi, M. Martino, Giuseppe Maruccio, Anna Grazia Monteduro, F. Oliva, C. Pinto, S. Spagnolo,
The PADME experiment at the DA$\Phi$NE Beam-Test Facility (BTF) is designed to search for the gauge boson of a new $\rm U(1)$ interaction in the process e$^+$e$^-\rightarrow\gamma$+$\rm A'$, using the intense positron beam hitting a light target. The $\rm A'$, usually referred as dark photon, is assumed to decay into invisible particles of a secluded sector and it can be observed by searching for an anomalous peak in the spectrum of the missing mass measured in events with a single photon in the final ...
Tópico(s): Radiation Detection and Scintillator Technologies
2018 - Elsevier BV | Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
E. Mihóková, Federico Moretti, N. Chiodini, A. Lauria, Mauro Fasoli, A. Vedda, Angelo Claudio Nale, M. Nikl, P. Boháček,
We bring into consideration a novel, potentially promising scintillating material, Pb-doped SrHfO 3 . The structural and optical properties of a series of Pb-doped SrHfO 3 powders prepared by acetate and citrate combustion are investigated and compared to those of undoped and Ce-doped powders with the same composition. Room temperature radioluminescence studies as a function of sintering temperature show that samples sintered up to the highest final temperature (1150°C) display the highest light output. ...
Tópico(s): Nuclear materials and radiation effects
2010 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Nuclear Science
I. Veronese, M.C. Cantone, N. Chiodini, Adolf Coray, Mauro Fasoli, Antony Lomax, E. Monès, Federico Moretti, A. Vedda,
A radioluminescent (RL) dosimeter based on cerium-doped silica optical fibre was recently developed by means of the sol-gel and powder-in-tube techniques. The detector, already tested with both soft X-rays and more energetic photon beams used in conventional radiation therapy and in stereotactic radiosurgery, showed interesting and promising properties. A feasibility study for the use of the doped fibre in proton therapy is here presented. The measurements were performed at the proton therapy facility ...
Tópico(s): Advanced Radiotherapy Techniques
2009 - Elsevier BV | Radiation Measurements
N. Chiodini, A. Vedda, Mauro Fasoli, Federico Moretti, A. Lauria, M.C. Cantone, I. Veronese, Giampiero Tosi, Marco Brambilla, Barbara Cannillo, E. Monès, Gilberto Brambilla, M. N. Petrovich,
Scintillating materials, able to convert energy of ionizing radiation into light in the visible-UV interval, are presently used in a wide class of applications such as medical imaging, industrial inspection, security controls and high energy physics detectors. In the last few years we studied and developed a new radiation sensor based on silica-glass fiber-optic technology. In its simplest configuration such device is composed by a short portion (about 10 mm) of scintillating fiber coupled to a photomultiplier ...
Tópico(s): Advanced Optical Sensing Technologies
2009 - SPIE | Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
A. Vedda, N. Chiodini, Daniela Di Martino, Mauro Fasoli, Franca Morazzoni, Federico Moretti, Roberto Scotti, G. Spinolo, A. Baraldi, R. Capelletti, Margherita Mazzera, M. Nikl,
The radioluminescence (RL) properties of Ce-doped silica glasses prepared by sol−gel method were investigated as a function of the dopant amount in a wide range of concentrations (Ce:Si molar ratios from 1 × 10-5 to 5 × 10-2). The effects of xerogel densification temperature and of a postdensification thermal treatment were also considered. In order to understand the microstructural features governing Ce3+ luminescence efficiency, optical absorption measurements in the ultraviolet, visible, and infrared ...
Tópico(s): Nuclear materials and radiation effects
2006 - American Chemical Society | Chemistry of Materials
A. Vedda, N. Chiodini, Daniela Di Martino, Mauro Fasoli, L. Griguta, Federico Moretti, E. Rosetta,
Thermally stimulated luminescence (TSL) properties of cerium and terbium doped SiO2 sol–gel glasses were studied after X-ray irradiation in the temperature range 10–700 K. The role of Ce3+ and Tb3+ as recombination centers was shown. The existence of a distribution of trap levels was observed; the activation energies of such a distribution were calculated to extend from about 8 × 10−3 eV up to 1.8 eV for both cerium and terbium doped sol–gel glasses. The effect of a post-densification thermal treatment ...
Tópico(s): Mineralogy and Gemology Studies
2005 - Elsevier BV | Journal of Non-Crystalline Solids
A. Vedda, N. Chiodini, Daniela Di Martino, Mauro Fasoli, S. Keffer, A. Lauria, M. Martini, Federico Moretti, G. Spinolo, M. Nikl, N. Solovieva, Gilberto Brambilla,
A radioluminescent (RL) dosimetric system, based on a SiO2 optical fiber with the core doped by Ce3+ ions as luminescent activators has been investigated. Structural and optical properties of the luminescent fiber have been studied by Raman, refractive index, RL and scintillation time decay measurements, and compared to those obtained on bulk material. The RL response of a composite fiber made of a short portion of active Ce-doped fiber coupled to a long commercial one has been investigated by x- ...
Tópico(s): Glass properties and applications
2004 - American Institute of Physics | Applied Physics Letters
A. Lauria, N. Chiodini, Mauro Fasoli, E. Mihóková, Federico Moretti, Angeloclaudio Nale, M. Nikl, A. Vedda,
The synthesis of rare-earth doped Lu4Hf3O12 phosphor nanopowders was achieved through the combustion of metal–organic acetate–citrate amorphous gels. Their crystalline structure and morphology have been characterized by X-ray diffraction and electron microscopy. Under UV and X-ray excitation a bright luminescence of the Eu3+ and Tb3+ dopant ions has been monitored by photo-luminescence as well as by radio-luminescence measurements. We highlight the role of the formation of nanosized precursor gels ...
Tópico(s): Perovskite Materials and Applications
2011 - Royal Society of Chemistry | Journal of Materials Chemistry
A. Vedda, N. Chiodini, Daniela Di Martino, Mauro Fasoli, M. Martini, Federico Moretti, E. Rosetta, G. Spinolo, M. Nikl, N. Solovieva, A. Baraldi, R. Capelletti,
Radio-luminescence (RL) and wavelength resolved thermally stimulated luminescence (TSL) measurements have been performed on sol-gel SiO 2 glasses, undoped (with high OH- or low OH-content) and rare-earth (Ce, Gd and Tb) doped in the temperature range 10-310K. Moreover, a comparison has been performed between undoped sol-gel and commercial glasses. In undoped samples RL spectra are characterized by emissions at 1.9eV, 2.4eV (only in high OH-content glasses) and 2.7eV at 10 K; their nature is discussed ...
Tópico(s): Photorefractive and Nonlinear Optics
2004 - Elsevier BV | Journal of Non-Crystalline Solids
Rossella Di Napoli, Alessandro Aiuppa, Attilio Sulli, Stefano Caliro, Giovanni Chiodini, Valerio Acocella, Giuseppe Ciraolo, Mauro Antonio Di Vito, Francesco Interbartolo, Carmelo Nasello, M. Valenza,
Abstract The ongoing unrest at the Campi Flegrei caldera (CFc) in southern Italy is prompting exploration of its poorly studied offshore sector. We report on a multidisciplinary investigation of the Secca delle Fumose (SdF), a submarine relief known since antiquity as the largest degassing structure of the offshore sector of CFc. We combined high‐resolution morphobathymetric and seismostratigraphic data with onshore geological information to propose that the present‐day SdF morphology and structure ...
Tópico(s): Geology and Paleoclimatology Research
2016 - Wiley | Geochemistry Geophysics Geosystems
I. Veronese, N. Chiodini, S. Cialdi, Eduardo d’Ippolito, Mauro Fasoli, Salvatore Gallo, Stefano La Torre, E. Monès, A. Vedda, G. Loi,
Over the years, many efforts have been made to develop radiation detectors to handle the complex issues of small field dosimetry and achieve the increasing accuracy, precision and in vivo dose monitoring required by the new advanced treatment modalities. In this context, interest has surged in the development of sensors based on scintillating optical fibres. In this paper, the near-infrared radioluminescence and dosimetric properties of Yb-doped silica optical fibres, coupled with a laboratory prototype ...
Tópico(s): Radiation Therapy and Dosimetry
2017 - IOP Publishing | Physics in Medicine and Biology
Vincenzo Bellizzi, Paolo Chiodini, Adamasco Cupisti, Battista Fabio Viola, Mauro Pezzotta, Luca De Nicola, Roberto Minutolo, Giovanni Barsotti, Giorgina Barbara Piccoli, Biagio Di Iorio,
Very low-protein intake during chronic kidney disease (CKD) improves metabolic disorders and may delay dialysis start without compromising nutritional status, but concerns have been raised on a possible negative effect on survival during dialysis. This study aimed at evaluating whether a very low-protein diet during CKD is associated with a greater risk of death while on dialysis treatment. This is an historical, cohort, controlled study, enrolling patients at dialysis start previously treated in ...
Tópico(s): Folate and B Vitamins Research
2014 - Oxford University Press | Nephrology Dialysis Transplantation
Francesca Cova, Federico Moretti, Mauro Fasoli, N. Chiodini, K. Pauwels, E. Auffray, M. T. Lucchini, S. Baccaro, Alessia Cemmi, H. Bártová, A. Vedda,
The results of irradiation tests on Ce-doped sol-gel silica using x- and γ-rays up to 10 kGy are reported in order to investigate the radiation hardness of this material for high-energy physics applications. Sol-gel silica fibers with Ce concentrations of 0.0125 and 0.05 mol. % are characterized by means of optical absorption and attenuation length measurements before and after irradiation. The two different techniques give comparable results, evidencing the formation of a main broad radiation-induced ...
Tópico(s): Photorefractive and Nonlinear Optics
2018 - Optica Publishing Group | Optics Letters
Iacopo Cioffi, Mauro Farella, Paolo Chiodini, Lucia Ammendola, Riccardo Capuozzo, C. Klain, Stefano Vollaro, Ambra Michelotti,
Summary Patients with masticatory muscle pain and migraine typically report that the intensity of pain fluctuates over time and is affected by weather changes. Weather variables, such as ambient temperature and humidity, may vary significantly depending on whether the individual is outdoor or indoor. It is, therefore, important to assess these variables at the individual level using portable monitors, during everyday life. This study aimed to determine and compare the temporal patterns of pain in ...
Tópico(s): Olfactory and Sensory Function Studies
2017 - Wiley | Journal of Oral Rehabilitation
I. Veronese, C. De Mattia, Mauro Fasoli, N. Chiodini, M.C. Cantone, Federico Moretti, Christophe Dujardin, A. Vedda,
Point defects in the host lattice of a scintillator material can trap carriers, slowing down their migration or even preventing their transfer to luminescent centers. Such competition schemes between defects and luminescent centers may explain also the hysteresis effect, which consists of a progressive enhancement of scintillation efficiency with accumulated dose. We propose a comparison between the scintillation hysteresis effect of Yb-doped sol–gel silica glasses in bulk and fiber forms, and we ...
Tópico(s): Nuclear materials and radiation effects
2015 - American Chemical Society | The Journal of Physical Chemistry C
I. Veronese, C. De Mattia, Mauro Fasoli, N. Chiodini, E. Monès, M.C. Cantone, A. Vedda,
Radio-luminescence (RL) optical fiber sensors enable a remote, punctual, and real time detection of ionizing radiation. However, the employment of such systems for monitoring extended radiation fields with energies above the Cerenkov threshold is still challenging, since a spurious luminescence, namely, the “stem effect,” is also generated in the passive fiber portion exposed to radiation. Here, we present experimental measurements on Yb-doped silica optical fibers irradiated with photon fields of ...
Tópico(s): Spectroscopy and Laser Applications
2014 - American Institute of Physics | Applied Physics Letters