Giovanni Mattei

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Lipid-containing nanostructures, in the form of solid lipid nanoparticles or iron oxide nanoparticles (NPs) coated with a lipid shell, were used as case studies for assessing and optimizing staining for transmission electron microscopy structural and compositional characterization. These systems are of paramount importance as drug delivery systems or as(More)
Metal (Au, Pt, Au@Pt) and metal oxide (TiO(2)) nanoparticles are synthesized with colloidal techniques and subsequently used as nanocrystal inks for thin films deposition. The optical properties of Au colloids are strongly influenced by both Pt and TiO(2) interfaces: while platinum causes a damping and a blue-shift of the Au Surface Plasmon Resonance (SPR)(More)
Generating, controlling, and monitoring spin effects in conducting nanostructures by using light is a highly important scientifi c and technological challenge. [ 1 , 2 ] Moreover the possibility of coupling the optical and magnetic properties in nanostructured materials can lead to the creation of novel devices with photonic and magnetic properties. Control(More)
Au-Fe nanoparticles constitute one of the simplest prototypes of a multifunctional nanomaterial that can exhibit both magnetic and optical (plasmonic) properties. This solid solution, not feasible in the bulk phase diagram in thermal equilibrium, can be formed as a nanostructure by out-of-equilibrium processes. Here, the novel magnetic, optical and(More)
Linear arrays of noble metal nanoparticles, supporting Bragg plasmonic resonances, are proposed as optical nanoantennae. Electrodynamic calculations show that tunable, directional and wavelength selective emission enhancement is obtained throughout the visible and near-infrared spectrum by varying the dielectric environment and the array geometrical(More)
The paper deals with the sampled-data implementation of controllers designed by means of Immersion and Invariance stabilization techniques for a special class of dynamics. A multi-rate digital control law is derived to preserve at the sampling instants manifold attractivity. The immersion condition is guaranteed under sampling and invariance on the manifold(More)
We have developed an Ir/Si multilayer for extreme ultraviolet (EUV) applications. Normal incidence reflectance measurements of a prototype film tuned to 30 nm wavelength show superior performance relative to a conventional Mo/Si multilayer structure; we also find good stability over time. Transmission electron microscopy and electron dispersive x-ray(More)
A full-interaction electromagnetic approach is applied to interpret the local- and far-field properties of AuAg alloy nanoplanets (i.e. a central cluster surrounded by small "satellite" clusters very close to its surface) fabricated in silica by ion implantation and ion irradiation techniques. Optical extinction spectroscopy reveals a large plasmon redshift(More)
The quest for efficient ways of modulating localized surface plasmon resonance is one of the frontiers in current research in plasmonics; the use of a magnetic field as a source of modulation is among the most promising candidates for active plasmonics. Here we report the observation of magnetoplasmonic modes on colloidal gold nanoparticles detected by(More)
SiO(2) and TiO(2) dielectric nanoparticles are arranged in linear arrays, supporting collective Bragg modes, and employed as dielectric nanoantennae. Electrodynamic calculations show that strong, tunable, and lossless light extraction is obtained in a wide spectral range, including UV, visible, and near-infrared regions, in opposition to poor enhancement(More)