Search results for: V. Bello

Items from 1 to 20 out of 32 results

article

Mechanistic Studies on the Salicylate‐Catalyzed Peroxyoxalate Chemiluminescence in Aqueous Medium

Maidileyvis C. Cabello, Glalci A. Souza, Liena V. Bello, Wilhelm J. Baader

Photochemistry and Photobiology > 96 > 1 > 28 - 36

The peroxyoxalate reaction is one of the most efficient chemiluminescence transformations known and the only system occurring by an intermolecular chemically initiated electron exchange luminescence (CIEEL) mechanism with confirmed high quantum yields. The peroxyoxalate chemiluminescence (PO‐CL) is mainly studied in anhydrous organic medium; however, for bioanalytical application, it should be performed...

article

Local structure and X-ray magnetic circular dichroism of Au in Au-Co nanoalloys

C. Maurizio, N. Michieli, B. Kalinic, V. Mattarello, more

Applied Surface Science > 2018 > 433 > C > 596-601

Coupling a plasmonic metal with a magnetic one in thin films and nanostructures is very interesting for the emerging field of magnetoplasmonics. In particular, coupling through alloying is a promising strategy to induce a magnetic moment on the plasmonic metal atoms, in a way that is intimately related to the local structure of the (metastable) alloy material. In this framework, Au:Co bimetallic films...

article

Highly photo-catalytically active hierarchical 3D porous/urchin nanostructured Co3O4 coating synthesized by Pulsed Laser Deposition

R. Edla, N. Patel, M. Orlandi, N. Bazzanella, more

Applied Catalysis B: Environmental > 2015 > 166-167 > C > 475-484

A porous coating assembled with hierarchical 3D Co₃O₄ urchin-like particles was synthesized by Pulsed Laser Deposition (PLD) and thermal oxidation. Laser ablation of CoB powder, used as the target material, in oxygen atmosphere formed core–shell particles on the coating surface with mainly a metallic Co core and a mixture of Co, B and O accommodating the shell. The thermal oxidation of these core–shell...

article

Cobalt/cobalt oxide nanoparticles-assembled coatings with various morphology and composition synthesized by pulsed laser deposition

N. Patel, A. Santini, V. Bello, G. Mattei, more

Surface & Coatings Technology > 2013 > 235 > Complete > 784-791

Nano-particle (NP) catalysts are under intense investigation in the nanotechnology community because of their large surface-to-volume atomic ratio, size- and shape-dependent properties, and high concentration of low-coordinated active surface sites. However, there is no general strategy to synthesize NPs, possibly in one step, of various materials with tailored properties and desired morphologies...

article

Size sorting of ultrasmall magnetic nanoparticles and their aggregates behaviour

R. Costo, V. Bello, T. González-Carreño, S. Veintemillas-Verdaguer, more

Materials Research Bulletin > 2013 > 48 > 10 > 4294-4300

The applications of nanoparticles are, to a large degree, limited by their size distribution. However, monodisperse nanoparticles are not always easily synthesised. In this scenario, size sorting is usually needed to separate the populations in differently sized colloidal nanoparticles. In this study we compare the effectiveness of three different size sorting methods: ultracentrifugation, ultrafiltration...

article

5.23 Determinants of Left Ventricular Mass (LVM) in White Obese Women

G. Salvetti, F. Santini, A. Pucci, D. Versari, more

High Blood Pressure & Cardiovascular Prevention > 2008 > 15 > 3 > 231-231

article

Dynamic Changes of FDG Uptake and Clearance in Normal Tissues

Gang Cheng, Abass Alavi, Esther Lim, Thomas J. Werner, more

Molecular Imaging and Biology > 2013 > 15 > 3 > 345-352

Purpose This study aims to evaluate dynamic 2-deoxy-2-[¹⁸F]fluoro-d-glucose (FDG) uptake in normal tissues. Procedures Thirty male patients underwent FDG positron emission tomography (PET)/computed tomography imaging at 1, 2, and 3 h after tracer injection. Standardized uptake values (SUV) were obtained in regions of interest of normal tissues. Results The aorta (blood pool), liver, and spleen...

article

Novel multifunctional nanocomposites from titanate nanosheets and semiconductor quantum dots

A. Antonello, G. Brusatin, M. Guglielmi, V. Bello, more

Optical Materials > 2011 > 33 > 12 > 1839-1846

A novel synthesis for a titanate nanosheets loaded nanocomposite has been developed. On this basis, a multifunctional material for optical applications has been fabricated with tunable refractive index, improved processing behavior and luminescent properties imparted by the incorporation of semiconductor quantum dots.Titanate synthesis, host material choice and quantum dots functionalization have...

article

Nanocomposites of titania and hybrid matrix with high refractive index

A. Antonello, G. Brusatin, M. Guglielmi, V. Bello, more

Journal of Nanoparticle Research > 2011 > 13 > 4 > 1697-1708

A sol–gel route for TiO₂ nanocrystals (NCs) synthesis has been developed at low temperature without surfactants. Synthetic and processing parameters have been optimized to maximize particles’ colloidal stability and crystallinity. The obtained TiO₂ NCs can be homogeneously dispersed in a sol–gel derived organic–inorganic hybrid material, resulting in homogeneous composite films when prepared by spin...

article

Synthesis and characterization of SnO2 nanoparticles embedded in silica by ion implantation

M.A. Tagliente, V. Bello, G. Pellegrini, G. Mattei, more

Nuclear Inst. and Methods in Physics Research, B > 2010 > 268 > 19 > 3063-3065

Tin dioxide nanoparticles embedded in silica matrix were fabricated by ion implantation combined with thermal oxidation. Silica substrate was implanted with a 150keV Sn ⁺ ions beam with a fluence of 1.0×10 ¹⁷ ions/cm ² . The sample was annealed for 1h in a conventional furnace at a temperature of 800°C under flowing O ₂ gas. According to the structural characterization...

article

Nonlinear optical properties of Au–Ag nanoplanets made by ion beam processing of bimetallic nanoclusters in silica

T. Cesca, G. Pellegrini, V. Bello, C. Scian, more

Nuclear Inst. and Methods in Physics Research, B > 2010 > 268 > 19 > 3227-3230

The nonlinear absorption of Au–Ag nanoplanets made by Ar irradiation of bimetallic nanoclusters in silica has been experimentally investigated by means of the single beam z-scan technique. The measurements have been performed in the picoseconds regime in order to isolate the fast electronic contribution to the third-order nonlinearity. The results reveal large nonlinear absorption properties of these...

article

Nanopatterning of silica with mask-assisted ion implantation

G. Perotto, V. Bello, T. Cesca, G. Mattei, more

Nuclear Inst. and Methods in Physics Research, B > 2010 > 268 > 19 > 3211-3214

In the present paper we combined ion implantation and nanosphere lithography to regularly dope, by a mask-assisted process, a SiO ₂ substrate with rare earth ions (Er) by ion implantation and to fabricate by sputtering a plasmonic 2D periodic array of Au nanostructures on the silica surface spatially coupled to the implanted Er ³⁺ ions. The aim of this work is to study how Er ³⁺...

article

Effects of somatostatin analogues on acromegalic cardiomyopathy: Results from a prospective study using cardiac magnetic resonance

F. Bogazzi, M. Lombardi, E. Strata, G. Aquaro, more

Journal of Endocrinological Investigation > 2010 > 33 > 2 > 103-108

Objective: Left ventricular (LV) hypertrophy is the main finding of patients with active acromegaly at cardiac magnetic resonance (CMR). The aim of the study was to evaluate heart changes in acromegalic patients treated with somatostatin analogues (SMSA) using CMR. Design and patients: This was a prospective study. Fourteen consecutive patients (8 women, mean age 46±10 yr) with untreated active acromegaly...

article

Structural evolution of Pd-capped Mg thin films under H2 absorption and desorption cycles

G. Siviero, V. Bello, G. Mattei, P. Mazzoldi, more

International Journal of Hydrogen Energy > 2009 > 34 > 11 > 4817-4826

In this paper we present a study on the relation between the evolution, upon successive H ₂ cycling, of the crystalline order and the H ₂ sorption properties of Pd-capped textured Mg thin films grown on Si and glass substrates.Using an asymmetric diffraction geometry suitable for thin films, it is found that: i) hydrogen desorption can be achieved at low temperatures exposing the samples...

chapter

Cellular interaction with Si- and iron-based nanoparticles for bio-imaging: A study of biocompatibility

I. Rivolta, R. D'Amato, R. Alexandrescu, M. Falconieri, more

2009 9th IEEE Conference on Nanotechnology (IEEE-NANO) > 593 - 596

2009 9th IEEE Conference on Nanotechnology (IEEE-NANO 2009)

The overall objective of BONSAI project (FP6, EC) is the development of ultrasensitive bio-imaging techniques based on novel multifunctional nanoparticles (NPs) with tailored optical and magnetic properties for visualizing complex cellular structures (in tissues and organs), receptors, tumour cells and masses. An important aspect to take into consideration involves the cellular responses to the impact...

chapter

Advances in the preparation of novel functionalized nanoparticles for bioimaging

R. D'Amato, R. Alexandrescu, V. Bello, V. Bouzas, more

2009 9th IEEE Conference on Nanotechnology (IEEE-NANO) > 597 - 600

2009 9th IEEE Conference on Nanotechnology (IEEE-NANO 2009)

The EC BONSAI Project intends to develop multifunctional nanoparticles with tailored optical and/or magnetic properties for visualizing complex cellular structures (in tissues and organs), receptors, tumor cells and masses. In this framework, here we will report on recent advances on the preparation of luminescent silicon nanoparticles, magnetic iron oxide nanoparticles and Au nanorods for bio-imaging...

article

Local-field enhancement in metallic nanoplanets

G. Pellegrini, G. Mattei, V. Bello, P. Mazzoldi

Materials Science & Engineering B > 2008 > 149 > 3 > 247-250

Generalized Multiparticle Mie theory is applied in order to study in detail local-field properties of metallic nanoplanets (i.e., a central cluster surrounded by small “satellite” clusters very close to its surface), obtained by ion beam techniques. Strongly asymmetric dimers are chosen as model systems in order to establish the influence of topological parameters such as satellite dimension and distance...

article

Interacting metal nanoparticles: Optical properties from nanoparticle dimers to core-satellite systems

G. Pellegrini, G. Mattei, V. Bello, P. Mazzoldi

Materials Science & Engineering C > 2007 > 27 > 5-8 > 1347-1350

Prompted by the growing interest in the optical properties of coupled metal nanoclusters, we implemented a code in the framework of Generalized Multiparticle Mie theory (GMM) to simulate far-field properties of strongly interacting spherical particles. In order to validate the code different case studies, including systems modeled for the first time, have been treated. The extinction properties of...

article

Early abnormalities of left ventricular myocardial characteristics associated with subclinical hyperthyroidism

V. Bello, F. Aghini-Lombardi, F. Monzani, E. Talini, more

Journal of Endocrinological Investigation > 2007 > 30 > 7 > 564-571

The aim of the present study was to analyze heart function in subclinical hyperthyroidism (sHT) in otherwise healthy subjects by new methods using intramyocardial ultrasonic techniques. Twenty-four newly diagnosed and untreated sHT patients (20 women, 4 men; mean age: 42±4 yr) and 24 sex- and age-matched healthy volunteers were studied. All subjects were submitted to conventional 2D color-Doppler...

article

4.34 Effects of Bariatric Surgery on Preclinical Myocardial Alterations in Severe Obesity

A. Pucci, G. Salvetti, V. Bello, F. Santini, more

High Blood Pressure & Cardiovascular Prevention > 2007 > 14 > 3 > 145-145

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Search results for: V. Bello

Mechanistic Studies on the Salicylate‐Catalyzed Peroxyoxalate Chemiluminescence in Aqueous Medium

Local structure and X-ray magnetic circular dichroism of Au in Au-Co nanoalloys

Highly photo-catalytically active hierarchical 3D porous/urchin nanostructured Co3O4 coating synthesized by Pulsed Laser Deposition

Cobalt/cobalt oxide nanoparticles-assembled coatings with various morphology and composition synthesized by pulsed laser deposition

Size sorting of ultrasmall magnetic nanoparticles and their aggregates behaviour

5.23 Determinants of Left Ventricular Mass (LVM) in White Obese Women

Dynamic Changes of FDG Uptake and Clearance in Normal Tissues

Novel multifunctional nanocomposites from titanate nanosheets and semiconductor quantum dots

Nanocomposites of titania and hybrid matrix with high refractive index

Synthesis and characterization of SnO2 nanoparticles embedded in silica by ion implantation

Nonlinear optical properties of Au–Ag nanoplanets made by ion beam processing of bimetallic nanoclusters in silica

Nanopatterning of silica with mask-assisted ion implantation

Effects of somatostatin analogues on acromegalic cardiomyopathy: Results from a prospective study using cardiac magnetic resonance

Structural evolution of Pd-capped Mg thin films under H2 absorption and desorption cycles

Cellular interaction with Si- and iron-based nanoparticles for bio-imaging: A study of biocompatibility

Advances in the preparation of novel functionalized nanoparticles for bioimaging

Local-field enhancement in metallic nanoplanets

Interacting metal nanoparticles: Optical properties from nanoparticle dimers to core-satellite systems

Early abnormalities of left ventricular myocardial characteristics associated with subclinical hyperthyroidism

4.34 Effects of Bariatric Surgery on Preclinical Myocardial Alterations in Severe Obesity

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