A5034962519- Laser-Ablation Synthesis of Nanoparticles
- Electrochemical Analysis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical sensors and biosensors
- ZnO doping and properties
- Thin-Film Transistor Technologies
- Copper-based nanomaterials and applications
- Fluid Dynamics and Thin Films
- Advanced Sensor and Energy Harvesting Materials
- Electrocatalysts for Energy Conversion
- nanoparticles nucleation surface interactions
- Nanomaterials and Printing Technologies
- Diamond and Carbon-based Materials Research
- Advanced Nanomaterials in Catalysis
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Theoretical and Computational Physics
- Advanced Memory and Neural Computing
- 2D Materials and Applications
- Transition Metal Oxide Nanomaterials
- Silicon Carbide Semiconductor Technologies
- Surface Roughness and Optical Measurements
- Laser Material Processing Techniques
- Polydiacetylene-based materials and applications
- Optical Coatings and Gratings
University of Catania
2014-2025
Institute for Microelectronics and Microsystems
2013-2024
National Research Council
2021-2024
Centro Siciliano di Fisica Nucleare e di Struttura della Materia
2012
We report on copper nanoparticles produced by laser ablation, in acetone and methanol, from a Cu target using 1064 nm nanosecond pulsed laser. The morphology, size, structure chemical composition of the are investigated as function solvent employed. Different analyses confirm metallic nature nanoparticles, without amorphous carbon or oxides shells. Then, embedded between two transparent electrodes, aluminium-doped zinc oxide (AZO) zirconium-doped indium (IZrO) top bottom layers,...
Pulsed laser ablation in liquid is a very powerful technique that allows to synthesize colloidal solution of nanoparticles, starting from target and solvent, without waste. The performance this process terms ablated mass per time depends on the fluence, energy delivered unit (or effective) area. Experimentally fluence evaluation tedious indirect process, since optical path passes through lens an air–liquid interface, which not easy observe. In work, computational approach provides...
Multi-walled carbon nanotubes (CNTs) decorated with zinc oxide nanoparticles (ZnO NPs) were prepared in isopropanol solution by a simple, room-temperature process and characterized from structural, morphological, electronic, optical points of view. A strong interaction between ZnO CNTs is fully confirmed all the characterization techniques. ZnO-CNTs nanocomposites, different weight ratios, deposited as dense layer two electrodes, order to investigate electrical behaviour. In particular,...
Hydrogen (HER) and Oxygen (OER) evolution reactions play a fundamental role in the field of green environmental sustainability, because they are key for water electrolysis. In this work copper (Cu) nanoparticles (NPs) produced by pulsed laser ablation liquid from target framework developing low-cost, earth abundant non-pollutant electrocatalyst. Various solvent energy fluence explored. Electrodes have been realized drop-casting Cu NPs onto Nickel foam (NF) substrate, with catalyst loading...
How nice would it be to obtain the size distribution of a nanoparticle dispersion fast and without electron microscope measurements? UV-Vis-NIR spectrophotometry offers very rapid solution; however, spectra interpretation can challenging needs take into account nanoparticles agglomeration. This work suggests Monte Carlo method for fitting using one or two distributions starting from dataset precomputed based on Mie theory. The proposed algorithm is tested copper produced with Pulsed Laser...
Laser irradiation of ZnO:Al/Ag/ZnO:Al transparent contacts is investigated for segmentation purposes. The quality the irradiated areas has been experimentally evaluated by separation resistance measurements, and results are complemented with a thermal model used numerical simulations laser process. presence Ag interlayer plays two key effects on scribing process increasing maximum temperature reached in structure accelerating cool down These evidences can promote use ultra-thin electrode...
Nanostructures of Cu 2 O/CuO hydroxide suitable for the electrochemical determination glucose are obtained by solid‐state dewetting CuO layers 6, 8, and 31 nm thin deposited sputtering onto 240 μm‐thick graphene paper. Solid‐state in nitrogen produces a partial decomposition into O Cu. X‐ray diffraction patterns reveal presence high‐index crystallographic facets, which reactive useful toward oxidation to gluconolactone. Typically, morphology studied scanning electron microscopy reveals...
Herein, Cu nanostructures are obtained by solid-state dewetting of 9 nm copper layer (dry) or ablating target, using a nanosecond pulsed laser at 1064 nm, in acetone and isopropyl alcohol (wet). The embedded aluminum-doped zinc oxide layer. Then, the electrical, optical, morphological properties two kinds systems, as function their synthesis parameters, investigated. aim is to compare fabrication methods select main conditions achieve best system for photovoltaic applications. differences,...
Glucose electrochemical sensors based on nanostructures of CuO/Cu(OH)2onto graphene paper were prepared by thermal (solid) and nanosecond pulsed laser (molten phase) dewetting a CuO layer 6 nm thin deposited sputtering. Dewetted systems, obtained without the use any binder, act as array nanoelectrodes. Solid state molten phase produce copper oxide-hydroxide with different average size, shape surface composition. Molten originates particles size below 100 nm, while solid produces about 200...
Cu nanoparticles were produced by using solid-state dewetting (dry) of a 1.3 nm layer or laser ablation solid target (wet) in acetone and methanol. The morphology chemical composition the investigated as function synthesis methods their key parameters annealing temperature (200-500 °C) liquid environment during ablation. then embedded transparent conductive oxide (TCO) films aluminum-doped zinc (AZO) zirconium-doped indium (IZrO); TCObott/Cu nanoparticle/TCOtop structures synthesized with...
Nanocomposites formed by aluminum-doped zinc oxide nanoparticles (AZO-NP) and multiwall carbon nanotubes (CNT) are proposed here as a promising material for UV light sensing applications, with the great advantage of operating in air, at room temperature, low voltage. Nanocomposite layers were prepared different AZO:CNT weight ratios simple methodology temperature. They characterized means UV-Vis spectroscopy, scanning transmission electron microscopies (SEM TEM), X-ray photoelectron...
Recently, hydrogen evolution reaction (HER) in alkaline media has received a renewed interest both the fundamental research as well practical applications. Pulsed Laser Ablation Liquid (PLAL) been demonstrated very useful technique for unconventional preparation of nanomaterials with amazing electro-catalyst properties toward HER, compared to those prepared by conventional methods. In this paper, we electro-sorption Pt, Pd, Pt80Pd20, and Cu(OH)2 nanoparticles (NPs) PLAL. The NPs were placed...
Non-enzymatic electrochemical glucose sensors are of great importance in biomedical applications, for the realization portable diabetic testing kits and continuous monitoring systems. Nanostructured materials show a number advantages applications analytical electrochemistry, compared to macroscopic electrodes, such as sensitivity little dependence on analyte diffusion close electrode-solution interface. Obtaining electrodes based nanomaterials without using expensive lithographic techniques...
Cu2O/CuO Hydroxide Nanoelectrode Arrays In article number 2100389 by Antonino Scandurra, Francesco Ruffino, and co-workers, nanoelectrode arrays of hydroxide for the electrochemical determination glucose are obtained dewetting CuO thin layers onto graphene paper. On cover you can see scanning electron micrograph copper oxide-hydroxide nano electrode array paper determination, experimental setup cyclic voltammograms in sodium 0.1 m.
Composition and morphology of two types bilayers plasma‐enhanced chemical vapor deposition hydrogened silicon nitride (SiN x :H) polyimide (PI), as effcient barrier against moisture in SiC‐based power devices, are investigated. Two nitrides obtained by changing the flow ratios SiH 4 NH 3 precursors. Rutherford Backscatterered analyses show that Si/N ratio varies from 0.6 to 0.8. Elastic recoil detection sample with higher nitrogen content has a total bound hydrogen 7.8 × 10 17 cm −2 respect...
Graphene oxide offers opportunities in electro-optical applications owing to its tunable absorbance and emission gamut. Particularly, graphene nanosheets (GO-n) prepared via laser reduction represent a peculiar scenario where optical properties are influenced by factors encompassing chemical reduction, pore formation, quantum confinement. The disentanglement of these modifying photoluminescence spectra is challenging but provides insights for tailoring GO-n optics. We tackle this issue...