A5074452494- Electron and X-Ray Spectroscopy Techniques
- Ion-surface interactions and analysis
- Semiconductor materials and devices
- Surface and Thin Film Phenomena
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Molecular Physics
- Carbon Nanotubes in Composites
- Semiconductor materials and interfaces
- TiO2 Photocatalysis and Solar Cells
- Semiconductor Quantum Structures and Devices
- Graphene research and applications
- Advanced Chemical Physics Studies
- Advanced Materials Characterization Techniques
- Chalcogenide Semiconductor Thin Films
- Magnetic properties of thin films
- Advanced Photocatalysis Techniques
- Metal and Thin Film Mechanics
- ZnO doping and properties
- Laser-induced spectroscopy and plasma
- Mass Spectrometry Techniques and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Nanopore and Nanochannel Transport Studies
- Liquid Crystal Research Advancements
- Magnetic and transport properties of perovskites and related materials
- Quantum Dots Synthesis And Properties
Sinopec (China)
2025
Sinopec Research Institute of Petroleum Processing
2025
University of Calabria
2008-2024
Shandong Institute of Metrology
2023
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Cosenza
2006-2009
Xiamen University
2008
National Synchrotron Radiation Laboratory
1999-2007
University of Science and Technology of China
1999-2007
Azienda Ospedaliera di Cosenza
1993
University of Minnesota
1986-1989
Development of versatile nanoplatforms that simultaneously integrate therapeutic and diagnostic features for stimuli-responsive delivery to tumors remains a great challenge. In this work, we report novel intelligent redox-responsive hybrid nanosystem composed MnO2 nanoparticles (NPs) doxorubicin (DOX) co-loaded within poly(N-vinylcaprolactam) nanogels (PVCL NGs) magnetic resonance (MR) imaging-guided ultrasound-targeted microbubble destruction (UTMD)-promoted tumor chemotherapy. Methods:...
We have combined high-angular-resolution Auger-electron diffraction, kinematical scattering calculations, low-energy-electron diffraction (done in a pulse-counting mode), and high-energy-resolution x-ray photoelectron spectroscopy to examine the formation of Fe/GaAs(001)-c(8\ifmmode\times\else\texttimes\fi{}2) interface. find that clusters bcc Fe at least three atomic layers deep grow registry with substrate for coverages up \ensuremath{\sim}4 monolayer equivalents. These contain Ga As atoms...
We have used high-resolution x-ray photoelectron spectroscopy to investigate the kinetics of formation Ti/Si(111)-7\ifmmode\times\else\texttimes\fi{}7 interface as a function temperature. At room temperature, we observe chemically shifted Si 2p core levels at binding energies -0.6 and -1.1 eV relative substrate, corresponding TiSi in solution Ti. When temperature is increased (T\ensuremath{\lesssim}340 \ifmmode^\circ\else\textdegree\fi{}C), rate Ti diffusion through layer substrate...
We present high-resolution synchrotron-radiation core-level photoemission results which show that the room-temperature deposition of Co onto GaAs(110) induces limited substrate disruption, leading to Ga and As intermixing with metal overlayer. High-energy Auger electron diffraction low-energy measurements indicate orders weakly form a metastable, epitaxial bcc matrix principal crystallographic axes parallel those substrate. Angle-dependent x-ray distribution in overlayer varies with, is...
The optical and chemical properties of Ag/TiO 2 nanocomposites were investigated to explore the possibilities incorporating these new materials in Gratzel photoelectrochemical cells. obtained doping TiO , both allotropic species anatase rutile, with silver nanoparticles (grown by laser ablation process). X-ray photoelectron data indicate absence Ag-Ti bonds, while measurements photoluminescence absorbance UV-visible range show a quench emission about 50% an increase visible 20%. Measurements...
In this paper we analyze the results of a wide range photoemission studies metal--III-V-compound-semiconductor interface formation. We find that semiconductor atoms segregate to vacuum surface metal overlayer in most cases and presence these accounts for slow attenuation observed core emission intensities. A theoretical model is developed which predicts such segregation based on cohesive energy relative atomic sizes substrate species. Good agreement between predictions experiment GaAs InP achieved.
Room-temperature formation of reactive M/InP(110) interfaces (where M denotes the 3d transition metals Ti, Cr, Fe, and Co) have been studied using high-resolution synchrotron radiation photoemission. Detailed line-shape analysis shows that these disrupt substrate to form phosphides release In atoms free surface. For Ti Cr depositions, there are also ultrathin regions or precursors reaction, which not observed for Fe Co, but do correlate clearly with Schottky barrier development final height....
Developing sustainable, efficient, and selective gold recovery technology is essential to implement the valorization of complementary alternative sources for this precious metal, such as spent e-waste, preserve environment. The main challenge in recovering from liquors obtained leached waste electronics low concentration metal compared impurities. Here, we report preparation a novel multivariate biological metal-organic framework (MTV-BioMOF) potential material ions water, even presence...
We report angle-resolved studies of projectile ${\mathit{L}}_{2,3}$-shell autoionization electron emission by bombarding a polycrystalline Al surface with 0.2--5-keV ${\mathrm{Ne}}^{+}$ ions. Several previously unresolved transition lines have been observed and assignment to Ne 2${\mathit{p}}^{3}$nln'l'n''l'' 2${\mathit{p}}^{3}$nln'l' autoionizing states has proposed. found that the $^{3}$P triplet is dominant configuration for excited 2${\mathit{p}}^{4}$3${\mathit{s}}^{2}$ its relative...
The relative intensities of the Ne $2{p}^{4}(^{3}P)3{s}^{2}^{3}P$ and $2{p}^{4}(^{1}D)3{s}^{2}^{1}D$ autoionization lines produced by 700 eV ${\mathrm{Ne}}^{+}$ ion impact on Na deposited polycrystalline Al Mo show a sensitive dependence coverage. We that collisionally excited $2{p}^{4}$ singlet core configuration can be efficiently converted to triplet at immediate vicinity excitation site, its rate depends strongly local electronic properties around target atomic site. These findings point...
We report observations of extremely energetic electrons produced in collisions between keV ${\mathrm{He}}^{+}$ and ${\mathrm{Ar}}^{+}$ different solid surfaces, with energies up to approximately 40% the center-of-mass energy. This emission can result from decay many-electron excitations nearly head-on collisions.
The distribution of atomic species across metal--III-V-compound-semiconductor interfaces has been studied with ${\mathrm{Ar}}^{+}$-ion bombardment and x-ray photoemission complemented by synchrotron radiation photoemission. Results for (Ti, Cr, Co, Au)/GaAs, (Co, Cr)/InP, (Cr, Au)/InSb show that room-temperature metal deposition induces substrate disruption. details reactions at these then play a critical role in determining the semiconductor atoms overlayers. Strong metal-anion cause...
We report a study on single scattering of 500--1950-eV ${\mathrm{Ne}}^{+}$ ions from Si surface. Our results show sharp increase in the inelastic energy loss suffered by backscattered for distance closest approach ${R}_{\mathrm{min}}<~$0.59 \AA{}. A detailed data analysis which considers both continuous interactions with target valence electrons and discrete inelasticity ${Q}_{o}$ binary Ne-Si collisions reveals constant ${Q}_{o}=45\ifmmode\pm\else\textpm\fi{}$4 eV ${R}_{\mathrm{min}}<~$0.47...
Photoemission has been used to examine the formation of metal overlayers on sputter-annealed ZnSe(100)-c(2\ifmmode\times\else\texttimes\fi{}2) surfaces for transition metals (Ti,Co), noble and near-noble (Cu,Ag,Au,Pd), a lanthanide (Ce), simple (Al). Analysis Zn 3d core-level emission reflects metal-substrate interaction as well substrate band bending function coverage. Large differences in chemical behavior have found. In particular, Ag Au adatoms induce negligible broadening, which is...
Ultraviolet-photoemission studies for Au--n-type ZnSe(100) interfaces show parallel changes in substrate band bending and the surface work function as a of Au coverage. For Zn-rich reconstructed c(2\ifmmode\times\else\texttimes\fi{}2) surface, electron affinity is 0.55 eV less than that cleaved (110) suggesting existence positive dipole. This dipole gradually reduced by 0.19 deposition \ensuremath{\sim}2 A\r{} Au. The results exponential decay Zn 3d core-level emission, but no line shape...
We present atom distribution profiles, obtained using nondestructive, polar-angle-dependent x-ray photoemission, of Au/GaAs(100)-c(8\ifmmode\times\else\texttimes\fi{}2) interfaces formed at room temperature. The results confirm substrate disruption, the release Ga and As atoms into overlayer, presence significant amounts segregated near vacuum surface. At high Au coverages, our analysis determines number atoms, shows that these decreases exponentially film (1/e length \ensuremath{\sim}3...
In this work, we present a study of growth and characterization nanocomposites, based on multiwalled carbon nanotubes metal nanoparticles (Al, Ag, Au, Co, Cu, Fe, Ni Ti).We observe very different behavior between noble transitions metals.All the nanocomposites are characterized by network with randomly insertion spherical particles dimensions about 100 nm (clearly visible in SEM images).In particular, transition each tube sheet surface is covered 40 -50 for all metals XPS measurements...
We explore the electronic structure in heavily overdoped regime of single-layer cuprate superconductor ${\mathrm{Bi}}_{1.74}{\mathrm{Pb}}_{0.38}{\mathrm{Sr}}_{1.88}\mathrm{Cu}{\mathrm{O}}_{6+\ensuremath{\delta}}$. found that nodal quasiparticle behavior is dominated mostly by phonons, while antinodal line shape spin fluctuations. Moreover, long range fluctuations diminish at very high doping, local magnetic still dominate dispersion, and system exhibits a strange metal entire regime.