A5073684252- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Metal complexes synthesis and properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Advanced Nanomaterials in Catalysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Lanthanide and Transition Metal Complexes
- Orbital Angular Momentum in Optics
- Porphyrin and Phthalocyanine Chemistry
- Mechanical and Optical Resonators
- Pigment Synthesis and Properties
- Analytical Chemistry and Sensors
- Plasmonic and Surface Plasmon Research
- solar cell performance optimization
- Photochemistry and Electron Transfer Studies
- Quantum Information and Cryptography
- Electrochemical sensors and biosensors
- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Molecular Sensors and Ion Detection
- Carbon Nanotubes in Composites
- Electrohydrodynamics and Fluid Dynamics
Institute for Chemical and Physical Processes
2014-2024
National Research Council
1998-2024
Policlinico San Matteo Fondazione
2023
Istituti di Ricovero e Cura a Carattere Scientifico
2023
University of Messina
1996-2018
Alcon (China)
2018
Alcon (Italy)
2016
University of Sheffield
2004
University of Bristol
1997-1998
University of Ferrara
1997
Dye-sensitized solar cells (DSSCs) were assembled by using the bougainvillea flowers, red turnip and purple wild Sicilian prickly pear fruit juice extracts as natural sensitizers of TiO2 films. The yellow orange indicaxanthin betacyanins are main components in cocktail dyes obtained from these products. best overall energy conversion efficiency 1.7% was obtained, under AM 1.5 irradiation, with extract, that showed a remarkable current density (Jsc = 9.5 mA/cm2) high IPCE value (65% at λ 470...
Brownian motion is a manifestation of the fluctuation−dissipation theorem statistical mechanics. It regulates systems in physics, biology, chemistry, and finance. We use graphene as prototype material to unravel consequences two dimensions, by studying optically trapped flakes. These orient orthogonal light polarization, due optical constants anisotropy. explain flake dynamics trap measure force torque from correlation functions tracking signals, well comparing experiments with full...
Here we report on the fabrication of a new low-cost transparent cathode based platinum nanoparticles prepared by bottom-up synthetic approach. Scanning Electron Microscope (SEM) images showed homogeneously distributed fluorine doped tin oxide conductive glass surface. We demonstrated that, with such type cathode, solar energy conversion efficiency is same as that obtained sputtered counter-electrode, and more than 50% greater standard electrode, i.e. one chlorine acid thermal decomposition,...
Mononuclear complexes [Re(bpym)(CO)(3)Cl] and [Pt(bpym)(CC-C(6)H(4)CF(3))(2)] (bpym = 2,2'-bipyrimidine), in which one of the bipyrimidine sites is vacant, have been used as "complex ligands" to prepare heterodinuclear d-f a lanthanide tris(1,3-diketonate) unit attached secondary site evaluate ability d-block chromophores act antennae for causing sensitized near-infrared (NIR) luminescence from adjacent lanthanide(III) centers. The two sets so prepared are [Re(CO)(3)Cl(mu-bpym)Ln(fod)(3)]...
In nature, fruit, vegetable, leaves, flowers and algae contain several dyes which can be easily extracted employed in dye sensitized photoelectrochemical cells. this contribution, the most significant advances made search for efficient convenient natural sensitizers are reported through meaningful examples case studies.
Seven flavylium salt dyes were employed for the first time as sensitizers dye-sensitized solar cells (DSSCs). The theoretical and experimental wavelengths of maximum absorbances, HOMO LUMO energy levels, coefficients, oscillator strengths dipole moments are calculated these synthetic dyes. introduction a donor group in molecular structure was investigated. Photophysical photoelectrochemical measurements showed that some analogues anthocyanins very promising DSSC applications. best...
Bifacial solar cells (BFSCs) are designed to enhance electrical power generation per unit area compared traditional monofacial cells. They accomplish this by capturing sunlight from both the front and rear surfaces.
A series of new organometallic platinum(II) complexes containing terdentate polypyridine ligands has been prepared and characterized. Their absorption spectra in 4:1 (v/v) MeOH/EtOH fluid solution at room temperature luminescence the same matrix 77 K have investigated. The species are [Pt(terpy)Ph]Cl (3, terpy = 2,2':6',2"-terpyridine, Ph phenyl), [Pt(Ph-terpy)Cl]Cl (4, Ph-terpy 4'-phenyl-2,2':6',2"-terpyridine), [Pt(Ph-terpy)Me]Cl (5), [Pt(Ph-terpy)Ph]Cl (6). results compared with those for...
For the structurally rigid homometallic dinuclear complexes (ttp)Ru(tpy-tpy)Ru(ttp)4+ and (ttp)Ru(tpy-ph-tpy)Ru(ttp)4+, we have obtained ground-state absorption spectra transient-absorption difference at room temperature luminescence lifetimes in interval from to matrix (90 K); solvent was acetonitrile or butyronitrile (tpy is 2,2':6',2''-terpyridine, ttp 4'-p-tolyl-2,2':6',2''-tpy, ph 1,4-phenylene). The gathered spectroscopic data indicate that after of visible light, formation luminescent...
We analyze the rotational dynamics of light driven nanorotors, made nanotube bundles and gold nanorods aggregates, with nonsymmetric shapes, trapped in optical tweezers. identify two different regimes depending on dimensions properties nanostructures. These correspond to alignment either laser propagation axis or dominant polarization direction, motions caused by unbalanced radiation pressure torque. By analyzing motion correlations nanostructures, we measure high accuracy both trapping...
We explore the effect of re-radiation in surface-enhanced Raman scattering (SERS) through polarization-sensitive experiments on self-organized gold nanowires which randomly oriented Methylene Blue molecules are adsorbed. provide exact laws ruling polarized, unpolarized, and parallel- cross-polarized SERS intensity as a function field polarizations. show that is polarized along wire-to-wire nanocavity axis, independently from excitation polarization. This proves selective enhancement dipole...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAbsorption Spectra, Luminescence Properties, and Electrochemical Behavior of Cyclometalated Iridium(III) Rhodium(III) Complexes with a Bis(pyridyl)triazole LigandGiuseppe Calogero, Gaetano Giuffrida, Scolastica Serroni, Vittorio Ricevuto, Sebastiano CampagnaCite this: Inorg. Chem. 1995, 34, 3, 541–545Publication Date (Print):February 1, 1995Publication History Published online1 May 2002Published inissue 1 February...
We review the most advanced methods for fabrication of cathodes dye-sensitized solar cells employing nanostructured materials. The attention is focused on metal nanoparticles and carbon, among which nanotubes graphene, whose good catalytic properties make them ideal development counter electrode substrates, transparent conducting oxide, catalyst
The development of novel, highly efficient, reliable, and robust surface enhanced Raman scattering (SERS) substrates containing a large number hot spots with programmed size, geometry, density is extremely interesting since it allows the sensing numerous (bio-)chemical species. Herein, an easy to fabricate, label-free SERS platform based on metal nanoparticles (NPs) thin-film developed by layer-by-layer growth mediated polyelectrolytes. A systematic study effect NP composition as well...