A5029120738- Laser-induced spectroscopy and plasma
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Diamond and Carbon-based Materials Research
- Surfactants and Colloidal Systems
- Spectroscopy and Quantum Chemical Studies
- Silicon Nanostructures and Photoluminescence
- Metal and Thin Film Mechanics
- Ion-surface interactions and analysis
- Semiconductor materials and devices
- Spectroscopy Techniques in Biomedical and Chemical Research
- Cultural Heritage Materials Analysis
- nanoparticles nucleation surface interactions
- Thin-Film Transistor Technologies
- Near-Field Optical Microscopy
- Nanowire Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Nonlinear Optical Materials Studies
- Material Dynamics and Properties
- ZnO doping and properties
- Advanced biosensing and bioanalysis techniques
- Laser Material Processing Techniques
- Biosensors and Analytical Detection
- Gas Sensing Nanomaterials and Sensors
- Thermodynamic properties of mixtures
Institute for Chemical and Physical Processes
2016-2025
National Research Council
2014-2025
Alcon (Italy)
2010-2023
University of Messina
1991-2020
Alcon (China)
2019
Politecnico di Milano
2016
Azienda Ospedaliera Ospedali Riuniti Papardo Piemonte
2011
Istituto di Metodologie Chimiche
1994-2008
Massachusetts Institute of Technology
1995
Institute of Structure of Matter
1992
IR and Raman spectra of bulk liquid water under intense electric fields reveal the contraction both onset a novel high-frequency librational mode band. Moreover, structure evolves toward “ice-like” arrangements.
The cold neutron imaging and diffraction instrument IMAT at the second target station of pulsed source ISIS is currently being commissioned prepared for user operation. will enable white-beam radiography tomography. One benefits operating on a to determine energy via time flight measurement, thus enabling energy-selective energy-dispersive imaging, maximizing image contrasts between given materials mapping structure microstructure properties. We survey hardware software components data...
Hydrogen bonds (H-bonds) are pivotal in various chemical and biological systems exhibit complex behavior under external perturbations. This study investigates the structural, vibrational, energetic properties of prototypical H-bonded dimers – water (H2O)2, hydrogen fluoride (HF)2, sulfide (H2S)2, ammonia (NH3)2 respective monomers static homogeneous electric fields (EFs) using accurate explicitly correlated singles doubles coupled cluster method (CCSD) for equilibrium geometries harmonic...
An effective method for the production of surface enhanced Raman scattering (SERS) active substrates is presented. Nanostructured silver thin films are pulsed laser deposited in an argon atmosphere. The consist arrays nanoparticles whose size controlled by Ar pressure. morphology can be tuned pulse number. Nanoparticle calculated a phenomenological model taking into account dynamics generated plasma. SERS activity investigated adsorbed rhodamine 6G at different concentrations.
This review reports on a new process for the synthesis of Si nanowires (NWs), based wet etching substrates assisted by thin metal film. The approach exploits thickness-dependent morphology layers to define uncovered nanometric regions, which behave as precursor sites formation very dense (up 1 × 1012 NW cm−2) arrays long several μm) and ultrathin (diameter 5–9 nm) NWs. Intense photoluminescence (PL) peaks, characterized maxima in 640–750 nm range an external quantum efficiency 0.5%, are...
Silicon nanowires (Si NWs), produced by the chemical etching technique, were decorated with silver nanoparticles (NPs) at room temperature pulsed laser deposition (PLD) technique. Silver NPs obtained means of nanosecond ablation a target in presence controlled Ar atmosphere. Two different pulse numbers and Si NWs having lengths used to change NP number density on NW surface. The resulting Ag morphologies studied scanning electron microscopy imaging. results show that this industrially...
Abstract Ag thin films were deposited by pulsed laser ablation in a controlled Ar atmosphere. The deposition process was performed at different pressure values the range between 10 and 100 Pa to investigate influence of ambient gas on plasma expansion dynamics film structural properties. Position, velocity volume generated as functions time obtained resolved fast photography. morphological properties investigated transmission electron microscopy which shows that growth proceeds via...
Surface enhanced Raman scattering (SERS) effects on tin dioxide in the form of bulk material, nanostructured thin films and colloidal solutions were investigated. spectra are characterized by three peaks at 478, 633, 776 \invcm, assigned to E$_g$, A$_{1g}$ B$_{2g}$ modes, typical rutile SnO$_2$. In presence silver nanoparticles, addition enhancement intensity some fundamental features, appearance a new peak about 600 cm$^{-1}$ is observed. This spectral features observed, also other SnO$_2$...
Abstract The surface‐enhanced Raman scattering (SERS) activity of silver thin films deposited by the pulsed laser ablation technique was investigated. samples were grown in a controlled Ar atmosphere at pressures ranging between 10 and 70 Pa, changing number pulses. Different surface morphologies, from isolated nearly spherical nanoparticles (NPs) to larger islands with smooth edges, observed means scanning transmission electron microscopies, as function different deposition conditions...
A new neutron imaging and diffraction facility, called IMAT, is currently being commissioned at the ISIS pulsed spallation source. IMAT will take advantage of time-of-flight measurement techniques for flexible energy selection effective discrimination. The instrument be completed within next few months, after neutrons have been recently delivered to sample area. From 2016 enable white-beam radiography tomography as well energy-dependent imaging. facility offer a spatial resolution down 50...
Silicon nanowires (SiNWs) decorated by pulsed laser ablation with gold or copper nanoparticles (labeled as AuNPs@SiNWs and CuNPs@SiNWs) were investigated for their catalytic properties. Results demonstrated high performances in the Caryl-N couplings subsequent carbonylations catalysts, respectively, that have no precedents literature. The excellent activity, attested very turn over number (TON) values, was due both to uniform coverage along NW length absence of chemical shell surrounding...
This paper examines the distribution and chemical properties of beached plastic pellets along Ionian Tyrrhenian coasts Southern Italy. Three locations have been sampled: Agnone Bagni (SR) Paradiso (ME) on coast Sicily, Baia del Tono in Milazzo Sicilian coast, Pizzo Calabro (VV) Calabria coast. Variations shape, size, compactness, color, other physical features, correlated with residence times transport, has highlighted. Raman spectroscopy, used a portable configuration, enabled rapid...
We have studied the aggregation of porphyrin $t{\ensuremath{-}\mathrm{H}}_{2}{\mathrm{P}}_{\mathrm{agg}}$ in aqueous solution by light scattering. The intensity profile elastically scattered light, exchanged wave-vector range $0.2\ensuremath{\le}q\ensuremath{\le}31.4\ensuremath{\mu}{\mathrm{m}}^{\ensuremath{-}1}$, indicates that produces large monodisperse clusters having a fractal structure, and is driven diffusion-limited kinetics. Additional measurements performed at different $q$ values...
Abstract A method for the growth of films consisting Nanoparticles (NP) Ag and Au is presented. Nanostructured were obtained by means nanosecond pulsed laser ablation a metallic target in presence controlled Ar atmosphere. The morphology these from island structures to isolated nanoparticles, measured SEM, depends on varying gas pressure (10‐100 Pa) number pulses (500‐30000), keeping other deposition parameters such as substrate distance, incidence angle, wavelength, fluence constant. Fast...