A5037043196- Molecular Junctions and Nanostructures
- Force Microscopy Techniques and Applications
- Polymer Surface Interaction Studies
- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Surface and Thin Film Phenomena
- Electrocatalysts for Energy Conversion
- Surface Chemistry and Catalysis
- Electrochemical Analysis and Applications
- Supramolecular Self-Assembly in Materials
- 3D Printing in Biomedical Research
- Lipid Membrane Structure and Behavior
- Bone Tissue Engineering Materials
- Electrospun Nanofibers in Biomedical Applications
- Anodic Oxide Films and Nanostructures
- Marine animal studies overview
- Protein Structure and Dynamics
- Nanofabrication and Lithography Techniques
- Spectroscopy and Quantum Chemical Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Graphene research and applications
- Underwater Acoustics Research
- Nanocluster Synthesis and Applications
- RNA Interference and Gene Delivery
University of Genoa
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2002-2019
National Interuniversity Consortium for the Physical Sciences of Matter
2007-2015
University of Trieste
2005-2006
AREA Science Park
2006
University of Ljubljana
2006
École Polytechnique Fédérale de Lausanne
1995-1999
University of Zurich
1997-1999
Single living yeast cells have been encapsulated by the alternate adsorption of oppositely charged polyelectrolytes. Exploiting fluorescence techniques, we provide evidence shell and cell integrity after coating procedure. The most relevant result, however, is that, encapsulation, preserve their metabolic activities they are still able to divide. These hybrid polyelectrolyte can a cheap model system in wide range biophysical biotechnological applications, thanks tunable properties shell.
We report on a high-resolution X-ray photoemission spectroscopy study molecular-thick layers of l-cysteine deposited under ultrahigh vacuum conditions Au(110). The analysis core level shifts allowed us to distinguish unambiguously the states first-layer molecules from those belonging second layer. strongly interact with metal through their sulfur headgroup. multipeaked structure N 1s, O and C 1s levels is interpreted in terms different molecular moieties. neutral acidic fraction...
The tissue specificity of fibrillar deposition in dialysis-related amyloidosis is most likely associated with the peculiar interaction β2-microglobulin (β2-m) collagen fibers. However, other co-factors such as glycosaminoglycans might facilitate amyloid formation. In this study we have investigated role heparin process collagen-driven amyloidogenesis. fact, a well known positive effector fibrillogenesis, and elucidation its potential effect type particularly relevant because regularly given...
Glioblastoma (GBM), one of the deadliest brain tumors, accounts for approximately 50% all primary malignant CNS therefore novel, highly effective remedies are urgently needed. Boron neutron capture therapy, which has recently repositioned as a promising strategy to treat high-grade gliomas, requires conspicuous accumulation boron atoms in cancer cells. With aim selectively deliver sodium borocaptate (BSH, 12 B atoms-including molecule already employed clinics) GBM cells, we developed novel...
The increasing demand for heterogeneous materials prompts the interest physics and chemistry of organic–inorganic interfaces. Within this field we have investigated electronic states L-cysteine (Cys) adsorbed on Au(111) from aqueous solution with synchrotron-based, high resolution X-ray photoemission spectroscopy. analysis S 2p core level region in pristine samples prepared purified Cys indicates that adsorbs gold as a thiolate. absence signal related to physisorbed sulfur forms...
A study of the self-assembly 1,4-benzenedimethanethiol (BDMT; HS-CH(2)-(C(6)H(4))-CH(2)-SH) monolayers on gold is presented. Self-assembled (SAMs) are characterized by reflection-absorption infrared spectroscopy (RAIRS), X-ray photoelectron (XPS), and spectroscopic ellipsometry (SE) measurements. The ensemble measurements consistently shows that well-organized BDMT SAMs, with "standing-up" molecules, can be obtained high quality films incubation in n-hexane provided N(2)-degassed solutions...
We have investigated the optical response of thiolate self-assembled monolayers (SAMs) deposited from liquid phase on well characterized, (111)-textured gold films based use in situ and ex spectroscopic ellipsometry. considered SAMs formed by several molecules with thiol functionality, focusing octadecanethiol (C18) SAM model system. were able to show tiny variations induced monolayer thick great reproducibility high signal-to-noise ratio. identified spectral features related alkyl chain...
Aminophosphonates were chosen for a first step functionalization of TiO2 grown on titanium, as they possess phosphonate group one end, that can be exploited coupling with the oxide surface, and an amino other end to enable further surface. The deposition aminophosphonates different chain lengths (6 12 methylenes) was investigated. Oxygen plasma treatment proved useful in increasing number −OH groups at thus helping anchor aminophosphonates. By combining surface-sensitive experimental...
We show that selective electroless deposition (ELD) can be used as a tool for electrochemical nanostructuring. In first step, we bound palladium ions to an aminothiolate (AT) layer on Au(111) surface. Chemical reduction then served the fabrication of metallic islands monatomic height in turn activate ELD cobalt. studied growth cobalt function oxygen concentration bath and mixed amino-/alkanethiolate self-assembled monolayers (SAMs). situ scanning tunneling microscopy (STM) X-ray...
We report the results of a synchrotron-based high-resolution XPS study interaction L-cysteine (Cys) with well-characterized colloidal gold nanoparticles (NPs, typical size 3–4 nm), which were pre-deposited on highly oriented pyrolytic graphite and then brought into contact aqueous solution Cys by drop-casting. By comparison data previously obtained for deposition flat Au substrates (single crystals high quality films), we demonstrate formation strong Cys/NP thiolate bond. The analysis line...
Excitons dominate the light absorption and re-emission spectra of monolayer transition-metal dichalcogenides (TMD). Microscopic investigations excitonic response in TMD almost invariably extract information from radiative recombination step, which only constitutes one part picture. Here, by exploiting imaging spectroscopic ellipsometry (ISE), we investigate spatial dependence dielectric function chemical vapor deposition (CVD)-grown WS2 flakes with a microscopic lateral resolution, thus...
Copper electrodeposition has been followed by in situ electrochemical STM on Au(111) electrodes covered complete decanethiol monolayers. It found that Cu nanoparticles (2−5 nm) were formed at potentials comprising the underpotential deposition (UPD) region clean gold. The nanoparticle clusters appear to follow a nucleation and sudden growth process as their maximal size is attained instantaneously time scale of imaging process. Nanoparticle heights correspond one atomic layer Cu....
Anodisation of pure titanium has been carried out in sulphuric and phosphoric acid solutions at potentials ranging from 50 to 150V. The SEM AFM morphological analysis indicates that, within this potential range, oxidation solution produces better developed mesoporous oxide layers.
L-cysteine self-assembled monolayers (SAMs) have been deposited on gold from the liquid and vapour phase. Synchrotron based high resolution x-ray photoemission spectroscopy has used to characterize sulfur chemical states at SAM/gold interface. Results obtained pristine irradiated samples, prepared with both as-received purified L-cysteine, are reported. Pristine samples cysteine characterized by an intense, largely dominant S 2p state a binding energy around 162 eV (2p3/2 level) assigned...
Spectroscopic ellipsometry (SE) has been applied to study the optical properties of thiolate polydiacetylene (PDA) self-assembled monolayers (SAMs) deposited on low-roughness polycrystalline gold. A systematic investigation methyl-terminated diacetylene (dihexacosa-7,9-diyn disulfide, DS9) SAMs is presented. The results have compared with experiments carbazolyl-derivatized (14-(9H-9-carbazolyl)tetradeca-10,12-diyn-1-yl CDS9) and findings recently obtained alkanethiols. SE measurements...
We report a spectroscopic ellipsometry investigation of the electronic and morphological properties cluster-assembled nanoporous metallic gold films deposited from low-energy supersonic cluster beam. modeled optical response medium by explicitly introducing variable degree porosity in film finite-size effects due to nanometeric size. deduced characteristic size individual clusters within structure their depth-resolved arrangement. Comparison with independent data available literature yielded...
An accurate thickness determination provides insight into the complex vertical morphology of OEG-terminated SAMs.
Parallel to the Δ<italic>ñ</italic> increase, a change of thickness during photo-conversion is discussed.