A5065304803- Material Dynamics and Properties
- Surfactants and Colloidal Systems
- Fullerene Chemistry and Applications
- Spectroscopy and Quantum Chemical Studies
- Pickering emulsions and particle stabilization
- Liquid Crystal Research Advancements
- Lipid Membrane Structure and Behavior
- Boron and Carbon Nanomaterials Research
- Polymer Surface Interaction Studies
- Nanoplatforms for cancer theranostics
- Graphene research and applications
- Force Microscopy Techniques and Applications
- Advanced Chemical Physics Studies
- Phase Equilibria and Thermodynamics
- Photodynamic Therapy Research Studies
- Advanced biosensing and bioanalysis techniques
- RNA Interference and Gene Delivery
- Nanoparticle-Based Drug Delivery
- Theoretical and Computational Physics
- Proteins in Food Systems
- Silicon Carbide Semiconductor Technologies
- Optical Polarization and Ellipsometry
- Porphyrin and Phthalocyanine Chemistry
- Perovskite Materials and Applications
- Conducting polymers and applications
University of Parma
2015-2024
Institute of Condensed Matter Chemistry and Technologies for Energy
2018-2022
Institute for Energetics and Interphases
2014-2016
University of Bologna
2005-2010
Cranfield University
2009
Sheffield Hallam University
2009
European Synchrotron Radiation Facility
1996-2008
Institute of Crystallography
2007
Russian Academy of Sciences
2007
University of Catania
2006
The development of innovative nanosystems opens new perspectives for multidisciplinary applications at the frontier between materials science and nanomedicine. Here we present a novel hybrid nanosystem based on cytocompatible inorganic SiC/SiOx core/shell nanowires conjugated via click-chemistry procedures with an organic photosensitizer, tetracarboxyphenyl porphyrin derivative. We show that this is efficient source singlet oxygen cell oxidative stress when irradiated 6 MV X-Rays low doses...
We report X-ray Photon Correlation Spectroscopy (XPCS) results on a bidimensional (2D) gel formed by Langmuir monolayer of gold nanoparticles. The system allows an experimental determination the fourth order time correlation function which is compared to usual second functions and mechanical response measured macroscopic scale. observed dynamics anisotropic, heterogeneous super-diffusive nanoscale. Different scales, associated with fast inside 2D cages slower motion larger parts film, can be...
Abstract We investigate the interfacial dynamics of a 2D self-organized mixed layer made silica nanoparticles interacting with phospholipid (DPPC) monolayers at air/water interface. This system has biological relevance, allowing investigation toxicological effects on model membranes and lung surfactants. It might also provide bio-inspired technological solutions, exploiting self-organization DPPC to produce non-trivial structuration nanoparticles. The characterization yields information NPs...
The control of the behavior oil in water emulsions requires deeper investigations on adsorption properties emulsion stabilizers at interfaces, which are fundamental to explain (de)stabilization mechanisms. In this work, we present an extensive study oil-in-water stabilized by sodium dodecyl sulfate (SDS) below its critical micellar concentration. Dynamic tensiometry, dilational rheology, and electrical conductivity measurements used investigate droplet interface, whereas aging respective was...
We studied the mechanical and structural properties of mixed surface layers composed by 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) silica nanoparticles (NPs). These are obtained spreading a DPPC Langmuir monolayer on colloidal dispersion. The transfer/incorporation NPs into monolayer, driven electrostatic interactions, alters molecular orientation, mechanisms domain formation, consequently phase behavior layer during compression. investigation these systems means complementary...
We validated here the applicability to hyperthermia treatment of magnetic nanocapsules prepared by sequential layer-by-layer adsorption polyelectrolytes and magnetic, Fe3O4 nanoparticles. For shell preparation around a nanodroplet liquid core, biocompatible were used: poly l-lysine as polycation glutamic acid polyanion. The effect was demonstrated applying radio frequency (rf) field with maximum fields H up 0.025 T frequencies 430 kHz; we found sizable heating effects, rate 0.46 °C/min. also...
An intercalation compound of azafullerene, K 6 C 59 N, was prepared and structurally characterized. It is isostructural with the fullerene 60 , adopts a body-centered-cubic structure (lattice constant = 11.31 angstroms), consists quasi-spherical monomeric (C N) 6− ions. Density functional calculations structural electronic properties confirm similarity to but also suggest sizable deformation, principally confined in vicinity nitrogen atom, both molecular electron states. These results show...
We present a detailed investigation of the wave-vector dependence collective atomic motion in Au_{49}Cu_{26.9}Si_{16.3}Ag_{5.5}Pd_{2.3} and Pd_{42.5}Cu_{27}Ni_{9.5}P_{21} supercooled liquids close to glass transition temperature. Using x-ray photon correlation spectroscopy previously uncovered spatial range only few interatomic distances, we show that microscopic structural relaxation process mimics structure presents marked slowing down at main average interparticle distance. This behavior...
The use of metal nanoparticles is an established paradigm for the synthesis semiconducting one-dimensional nanostructures. In this work we study their effect on two-dimensional materials, by using gold chemical vapor deposition growth molybdenum disulfide (MoS
A new approach is proposed for measuring structural dynamics in materials from multi-speckle scattering patterns obtained with partially coherent X-rays. Coherent X-ray already widely used at high-brightness synchrotron lightsources to measure using photon correlation spectroscopy, but many situations this experimental based on recording long series of images ( i.e. movies) either not adequate or practical. Following the development visible-light speckle visibility dynamic information...
In this work, a supramolecular approach, based on molecular recognition, was used to direct the blending of immiscible polymers toward compatibility and even miscibility. A slight modification two polystyrene (PS) poly(butyl methacrylate) (PBMA), with introduction recognition groups tetraphosphonate cavitand (HOST) methylpyridinium (GUEST), respectively, led formation compatible mixtures between them, characterized by single Tg an homogeneous texture at surface level, as evidenced AFM...
Semiconductor photodetectors can work only in specific material-dependent light wavelength ranges, connected with the bandgaps and absorption capabilities of utilized semiconductors. This limitation has driven development hybrid devices that exceed individual materials. In this study, for first time, a heterojunction photodetector based on methylammonium lead bromide (MAPbBr
Cavitand molecules having double bond terminated alkyl chains and different bridging groups at the upper rim have been grafted on H-terminated Si(100) surface via photochemical hydrosilylation of bonds. Pure mixed monolayers obtained from mesitylene solutions either pure cavitand or cavitand/1-octene mixtures. Angle resolved high-resolution X-ray photoelectron spectroscopy has used as main tool for monolayer characterization. The decorated consists Si-C bonded layers with top layer. Grafting...
A set of modular components was designed, synthesized, and combined to yield an innovative, robust, reliable methodology for the self-assembly large supramolecular structures on silicon wafers. Specific host−guest H-bonding motifs were embedded in a single molecule by exploiting remarkable complexing properties tetraphosphonate cavitands toward methylammonium methylpyridinium salts outstanding homo- hetero-dimerization capability ureidopyrimidone moiety. An assembly/disassembly sequence...
Silica nanoparticles (SiNP) can be incorporated in phospholipid layers to form hybrid organic–inorganic bidimensional mesostructures. Controlling the dynamics these mesostructures paves way high-performance drug-delivery systems. Depending on different hydrophobicity/hydrophilicity of SiNP, recent X-ray reflectivity experiments have demonstrated opposite structural effects. While are reasonably well understood, less is known about effects dynamics, which turn determine molecular diffusivity...
There are huge demands on multifunctional nanocarriers to be used in nanomedicine. Herein, we present a simple and efficient method for the preparation of magnetically responsive polymeric-based optimized biomedical applications. The hybrid delivery system is composed drug-loaded polymer nanoparticles (poly(caprolactone), PCL) coated with multilayer shell polyglutamic acid (PGA) superparamagnetic iron oxide (SPIONs), which known as bio-acceptable components. PCL model anticancer drug...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTOn the Crystal Structure of Azafullerene (C59N)2C. M. Brown, L. Cristofolini, K. Kordatos, Prassides, C. Bellavia, R. González, Keshavarz-K., F. Wudl, A. Cheetham, J. P. Zhang, W. Andreoni, Curioni, N. Fitch, and PattisonView Author Information School Chemistry Molecular Sciences University Sussex, Brighton BN1 9QJ, UK Institute for Polymers Organic Solids Materials Research Laboratory, California, Santa Barbara, California 93106 IBM...
NMR and high-resolution x-ray diffraction of several lithium-doped fullerides ${\mathrm{Li}}_{x}{\mathrm{C}}_{60}$ show that the stoichiometry $x=12$ represents a stable Li doping for high symmetry ${\mathrm{C}}_{60}$-like phase, which might extend to much larger x. ${\mathrm{Li}}_{12}{\mathrm{C}}_{60}$ is fcc at temperature, it distorts tetragonal upon cooling. We have evidence from ${}^{13}\mathrm{C}$ ${\mathrm{C}}_{60}$ units are static in phase least up $T=373 \mathrm{K}.$ Rietvelt...
The myelin basic protein (MBP) is the second most abundant in sheath of central nervous system and believed to be important for compactness integrity membrane. We investigated mechanism interaction lipid-free MBP with phospholipid monolayers at air/water interface; particular, we studied process adsorption onto made up either neutral dipalmitoylphosphatidylcholine (DPPC) or negatively charged dipalmitoylphosphatidylserine (DPPS) monolayers. They are natural constituents membrane, sharing an...