DI ZITTI , Ermanno

A new method for extracting the base and emitter recombination parameters of silicon power p+-v-n+ diodes from open circuit voltage decay (OCVD) curves and reverse recovery data has been developed. The method relies on an optimization technique which makes use of numerical one-dimensional modeling data for obtaining the best fitting of...

The concurrent solution of large linear systems of equations on processor meshes of fixed size has been considered taking into account the basic requirements of computational efficiency and stability. A linear rotation based algorithm has been studied as a robust solution of linear problems well suited to be implemented on parallel...

In this work, we investigate the chemical conditions for inducing a self-organized growth of 2D and ID structures of gold nanoparticles (NPs), 50 nm diameter tri-sodium citrate stabilized, assembled onto chemically modified glass substrates through 3-Aminopropyltriethatoxysilane. The aggregation process of the nanoparticles on the silanised...

We present a non-conventional, low cost and simple approach for patterning gold nanoparticles (NPs) using highly oriented PolyTetraFluoroEthylene (HOPTFE) macromolecular segments on glass substrates. Transparent and stable HOPTFE templates for NP self-assembly were prepared by sliding unidirectionally a PTFE rod across a glass substrate at a...

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The ultra-short pulse propagation in Gallium Arsenide (GaAs) structures can be modeled through the Piecewise Linear Recursive Convolution (PLRC) technique in the context of the Finite-Difference Time-Domain (FDTD) solution of Maxwell's equations. Our model is based on a Lorentzian formulation of dispersive media, taking into account the Raman,...

A functional/behavioural simulator is described, in which the system to be simulated is modelled by defining its hierarchy and by specifying the descriptive function of the behaviour of its components. The functional model, based on the definition of strict and nonstrict functions, makes it possible to introduce and formally justify a...

Il rapido sviluppo delle nanotecnologie apre vie alternative alla miniaturizzazione dei circuiti integrati schiudendo nuovi orizzonti al settore ICT. Queste prospettive sono inquadrate in questo articolo evidenziando concetti, metodiche e strumenti peculiari delle nanotecnologie, mettendo in luce i materiali più promettenti e innovativi. Si...

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The synthesis of software algorithms and their hardware implementation require the use of efficient CAD tools providing detailed simulations and performance analysis. This paper presents a new behavioural simulator whose functional model is characterized by strict and non-strict functions, and by the concept of static and dynamic instances...

The aim of this work is to fabricate ordered arrays of thiolated gold nanoparticles grafted through electrically conductive molecular tethers onto gold electrodes. Dodecanethiol-capped gold nanoparticles were synthesized in a two-phase liquid–liquid system. Cluster size selection by the vapor transfer technique was repeatedly performed in order...

We show how the analysis of the current detected during the fabrication of titanium oxide dots by AFM local anodic oxidation allows the determination of the optimal duration of bias voltage for obtaining nanostructures with higher aspect ratio. Experimental conditions to fabricate oxide dots and lines are discussed. Finally, we demonstrate that...

We investigate the effect of different voltage waveforms on the growth of titanium oxide nanodots using Atomic Force Microscope (AFM) nanolithography. The resulting oxide features are compared by taking into account the current data detected during oxidation under the application of constant and linear ramp voltages. The experimental analysis...

We analyze transient current data during the formation of titanium oxide nanodots by AFM-tip-induced anodic oxidation with the aim of getting further understanding of local oxidation kinetics. The measured current waveforms show a transition between two distinct regimes, in agreement to what was previously known of the growth process, and their...

The fabrication of single electron transistors and/or highly sensitive biosensors is still a challenging task on account of the tight control required to get proper shapes and size of the electrodes. The nanosized tips and the separation of a few nanometers between electrode pairs are critical features. Conventional lithography is not suited to...

We report results obtained performing the fabrication of a back gate Field Effect Transistor that uses a rope of single wall nanotubes as channel. Nanotubes were made using the LASER ablation technique and they were characterized using micro-RAMAN spectroscopy, SEM and AFM imaging. A self-assembly method based on a high frequency electric field...

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Single-wall carbon nanotubes (SWCNTs) are one of the most interesting materials for transparent conductive films. In this work, we show our latest results on growth of transparent nanotube networks on quartz and silicon dioxide, and a new process to make a solid-tosolid direct transfer of these networks on a polycarbonate film to obtain, at...

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