A5087177497- Anodic Oxide Films and Nanostructures
- Force Microscopy Techniques and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Dental materials and restorations
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Bone Tissue Engineering Materials
- Near-Field Optical Microscopy
- Plasmonic and Surface Plasmon Research
- Graphene and Nanomaterials Applications
- Photonic and Optical Devices
- Advanced Sensor and Energy Harvesting Materials
- Catalytic Processes in Materials Science
- Molecular Junctions and Nanostructures
- Polymer Nanocomposites and Properties
- Nanoporous metals and alloys
- Conducting polymers and applications
- Corrosion Behavior and Inhibition
- TiO2 Photocatalysis and Solar Cells
- Photonic Crystals and Applications
- Nanofabrication and Lithography Techniques
- Smart Materials for Construction
- Multiferroics and related materials
- 3D Printing in Biomedical Research
- Catalysis and Oxidation Reactions
University of Genoa
1999-2025
Italian Institute of Technology
2015-2024
Max Bergmann Zentrum für Biomaterialien
2022-2023
Technische Universität Dresden
2022-2023
Institute for Globally Distributed Open Research and Education
2021-2023
Military University of Technology in Warsaw
2021
Ronin Institute
2020-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2020
University of Modena and Reggio Emilia
2010
Center for Nano Science and Technology
2009
This paper is intended to show how the control of optical response regular arrays gold nanoparticles allows improve our understanding surface-enhanced Raman scattering (SERS). Regular particle arrays, designed by electron-beam lithography, exhibit remarkable properties and appear be suitable substrates for deepened study mechanisms at origin SERS effect. Indeed, resonance surface plasmons localized on particles, which are visible near-infrared extinction spectra effect, can tuned almost any...
Incorporating enzymes into calcium alginate beads is an effective method to immobilise them and preserve, at the same time, their catalytic activity. Sodium was mixed with Aspergillus ficuum tannase in aqueous solution, tannase-loaded were prepared using a simple droplet-based microfluidic system. Extensive experimental analysis carried out characterise samples. Microscopic imaging revealed morphological differences between surfaces of bare matrix beads. Thermal allowed assessing hydration...
Addressing the fundamental question of miniaturization light guiding and routing towards nanoscale optics, we study experimentally surface plasmon propagation in silver gold thin films finite widths micrometer range. Spatially confined excitation plasmons is realized by a prism coupling arrangement involving an opaque aluminum screen for distinct separation (measurement) region. The length as function film measured detecting stray due to scattering with conventional optical microscope.
We show that metal nanowires sustaining collective electron oscillations (surface plasmon polaritons) can be used as optical waveguides. Thereby, the use of a allows to overcome limitations miniaturization imposed on conventional dielectric waveguides due diffraction. To demonstrate this effect we investigate 200 nm wide and 50 high gold nanowire locally excited at light wavelength 800 nm. By direct imaging near-field with subwavelength-resolution photon scanning tunneling microscopy observe...
We demonstrate that surface plasmon fields can be imaged in real time by detecting the fluorescence of a molecular film close to carrying metal surface. use this method image field profile plasmons launched at lithographically designed nanoscopic defects.
Perovskite solar cells (PSCs) are demonstrating great potential to compete with second generation photovoltaics. Nevertheless, the key issue hindering PSCs full exploitation relies on their stability. Among strategies devised overcome this problem, use of carbon nanostructures (CNSs) as hole transporting materials (HTMs) has given impressive results in terms stability moisture, air oxygen, and heat. Here, a HTM based poly(3‐hexylthiophene) (P3HT) matrix doped organic functionalized single...
Abstract Here, an approach to realize “smart” solid substrates that can convert their wetting behavior between extreme states under selective light irradiation conditions is described. Hybrid organic/inorganic surfaces are engineered by exploiting photolithographically tailored SU‐8 polymer patterns as templates for accommodating closely packed arrays of colloidal anatase TiO 2 nanorods, which able respond UV reversibly changing surface chemistry. The ‐covered characterized a dual...
We propose a large-area SERS device with efficient fluorescence quenching capability. The substrate is based on anodic porous alumina templates various pore size and wall thickness as small 15 36 nm, respectively. nano-patterned substrate, excellent control reproducibility of plasmon-polaritons generation, shows very enhanced Raman signal in the presence intrinsically fluorescent molecules such cresyl violet, rhodamine, green protein. This work demonstrates that, when nanostructures are...
We present an advanced image analysis study of the 3D surfaces silver/diamond-like carbon nanocomposite films prepared by radio-frequency plasma-enhanced chemical vapour deposition. Atomic force microscopy data were analysed, with goal to provide tools allowing for a better understanding structure–property correlation, specific case material. While samples' fractal dimension decreased and roughness increased increasing deposition time, succolarity showed no significant difference relatively...
The replacement of plastic with eco-friendly and biodegradable materials is one the most stringent environmental challenges. In this respect, cellulose stands out as a polymer. However, significant challenge to obtain for high-end photonics that are robust in humid environments. Here, we demonstrate fabrication high-quality micro- nanoscale photonic plasmonic structures via replica molding using pure blended version nonedible agro-wastes. Both soil seawater according ISO 17556 standard....
Metalloproteins are redox molecules naturally shuttling electrons with high efficiency between molecular partners. As such, they candidates of choice for bioelectronics. In this work, we have used bacterial metalloprotein azurin, hosted in a nanometer gap two electrically biased gold electrodes, to demonstrate an electrochemically gated single-molecule transistor operating aqueous environment. Gold-chemisorbed azurin shows peaks tunneling current upon changing electrode potential and related...
Surface roughness is the main factor determining bacterial adhesion, biofilm growth and plaque formation on dental surfaces in vivo. Air-polishing of removes but can also damage surface by increasing its roughness. The purpose this study was to investigate different conditions air-polishing performed vitro a recently introduced restorative composite. Abrasive powders sodium bicarbonate glycine, combined at treatment times (5, 10 30 s) distances (2 7 mm), have been tested. resulting root mean...
A polymer nanocomposite was produced by ultrasonic-assisted dispersion of multiwalled carbon nanotubes (MWCNTs) in a polycarbonate matrix using p-xylene and dichloromethane as the solvents. The filler loading varied from 1 to 3 wt % order examine effect MWCNTs on structure properties composites. nanocomposites were characterized DSC, DTA, TGA, UV-vis, FTIR Raman spectroscopy evaluate changes induced matrix. measurements confirmed presence dispersed phase composite films, while TGA DSC...
Copper nanoparticles have been synthesized in ethylene glycol (EG) using copper sulphate as a precursor and vanadium sulfate an atypical reductant being active at room temperature. We described technique for relatively simple preparation of such reagent, which has electrolytically produced without standard procedures requiring inert atmosphere mercury cathode. Several stabilizing agents tested cationic capping discarded owing to the formation complex compounds with ions leading insoluble...
Reanodizing metal underlayers through porous anodic alumina has already been used extensively to fabricate ordered columns of different oxides. Here, we present similar 3D multilayered nanostructures with unprecedented complexity. Two-level column-like nanofilms have synthesized by anodizing an Al/Nb layer in aqueous oxalic acid for forming the first level, and Al/Ta tartaric second level structure. Both levels were then reanodized boric acid. The Ta deposited on partially dissolved...
Sequential addition of a polyanion, poly(styrene sulfonate), and polycation, polyaniline, lead to the formation layer-by-layer films at different solid surfaces. The prime variables which determine sulfonate) (PSS)/polyaniline (PANI) were polymer charge ionic strength. deposited by selecting organic/inorganic acid media pH 2.8. building up such multilayer was characterized increment adsorbed amount through UV−visible spectroscopy. A linear increase in absorption magnitude measured from 1 25...
The development of novel hole transporting materials (HTMs) for perovskite solar cells (PSCs) that can enhance device's reproducibility is a largely pursued goal, even to the detriment very high efficiency, since it paves way an effective industrialization this technology. In work, we study covalent functionalization reduced graphene oxide (RGO) flakes with different organic functional groups aim increasing stability and homogeneity their dispersion within poly(3‐hexylthiophene) (P3HT) HTM....