A5069602973- Nanowire Synthesis and Applications
- Quantum and electron transport phenomena
- Advanced Thermoelectric Materials and Devices
- Electronic and Structural Properties of Oxides
- Thermal properties of materials
- Photonic and Optical Devices
- Graphene research and applications
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor Quantum Structures and Devices
- Photorefractive and Nonlinear Optics
- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Thermal Radiation and Cooling Technologies
- Quantum Dots Synthesis And Properties
- Carbon Nanotubes in Composites
- Gold and Silver Nanoparticles Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Ferroelectric and Piezoelectric Materials
- Advanced Thermodynamics and Statistical Mechanics
- Analytical Chemistry and Sensors
- Semiconductor materials and interfaces
- ZnO doping and properties
- Surface and Thin Film Phenomena
- Advanced Memory and Neural Computing
University of Modena and Reggio Emilia
2021-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2006-2024
Scuola Normale Superiore
2014-2023
Istituto Nanoscienze
2014-2023
National Enterprise for NanoScience and NanoTechnology
2013-2021
University of Pisa
2016-2020
Moscow Institute of Physics and Technology
2020
Princeton University
2020
National Research University Higher School of Economics
2020
Osipyan Institute of Solid State Physics RAS
2020
Tetramethyl-bis(ethylenedithio)-tetrathiafulvalene (TM-BEDT-TTF) enantiomers’ spin filtering and chiroptical properties are studied. Spin-filtering assessed by recording spin-polarized I – V curves (mc-AFM) of TM-BEDT-TTF fibrils.
Blends of reduced graphene oxide (RGO) and poly(3-hexylthiophene) (P3HT) are used as the active layer field-effect transistors (FETs). By using sequential deposition two components, density RGO sheets can be tuned linearly, thereby modulating their contribution to charge transport in transistors, onset percolation. The surface potential RGO, P3HT source–drain contacts is measured on nanometric scale with Kelvin Probe Force Microscopy (KPFM), correlated macroscopic performance FETs. KPFM also...
The artificial stacking of atomically thin crystals suffers from intrinsic limitations in terms control and reproducibility the relative orientation exfoliated flakes. This drawback is particularly severe when properties system critically depends on twist angle, as case dodecagonal quasicrystal formed by two graphene layers rotated 30°. Here we show that large-area 30°-rotated bilayer can be grown deterministically chemical vapor deposition Cu, eliminating need assembly. quasicrystals are...
We demonstrate high-temperature thermoelectric conversion in InAs/InP nanowire quantum dots by taking advantage of their strong electronic confinement. The electrical conductance G and the thermopower S are obtained from charge transport measurements accurately reproduced with a theoretical model accounting for multilevel structure dot. Notably, our analysis does not rely on estimate cotunnelling contributions, since thermal is dominated heat transport. By into account two spin-degenerate...
InAs nanowire-based back-gated field-effect transistors realized starting from individual nanowires are investigated at different temperatures and as building blocks of inverter circuits for logic applications. The nanodevices show n-type behavior with a carrier concentration up to 8.0 × 1017 cm−3 corresponding electron mobility exceeding 1590 1940 cm2 V−1 s−1 room temperature 200 K, respectively. investigation over wide range indicates no Schottky barrier source/drain electrodes, where...
Single-photon sources are important for integrated photonics and quantum technologies, can be used in key distribution, computing, sensing. Color centers the solid state a promising candidate development of next generation single-photon devices. They point defects crystal lattice that absorb emit light at given wavelengths single photons with high efficiency. The landscape color has changed abruptly recent years, identification wider set emergence new solid-state platforms room-temperature...
Abstract We present the results of a systematic study performed by micro‐Raman spectroscopy on pure anatase, rutile and mixed anatase–rutile TiO 2 thin films, deposited radio frequency magnetron sputtering quartz substrates, with different thicknesses. The crystal structures as‐deposited films were unambiguously determined good crystalline homogeneity was revealed mapping samples. In mixed‐phase relative amount two phases monitored simple analysis components multi‐Lorentzian fitting curves....
Millivolt range thermovoltage is demonstrated in single InAs-nanowire based field effect transistors. Thanks to a buried heating scheme, we drive both large thermal bias DT>10K and strong field-effect modulation of electric conductance on the nanostructures. This allows precise mapping evolution Seebeck coefficient S as function gate-controlled conductivity between room temperature 100K$. Based these experimental data novel estimate electron mobility given. value compared with result...
Metal-filled carbon nanotubes represent a novel class of photothermal nanomaterials: when illuminated by visible light they exhibit strong enhancement the temperature at metal sites, due to enhanced plasmonic absorption surface, which behaves as heat radiator. Potential applications include nanomedicine, heat-assisted magnetic recording, and light-activated thermal gradient-driven devices.
Abstract Producing and manipulating graphene on fab-compatible scale, while maintaining its remarkable carrier mobility, is key to finalize technological application. We show that a large-scale approach (chemical vapor deposition Cu followed by polymer-mediated semi-dry transfer) yields single-layer crystals fully comparable, in terms of electronic transport, micro-mechanically exfoliated flakes. Hexagonal boron nitride used encapsulate the crystals—without taking part their detachment from...
We experimentally and computationally investigate the magneto-conductance across radial heterojunction of InAs-GaSb core–shell nanowires under a magnetic field, B, up to 30 T at temperatures in range 4.2–200 K. The observed double-peak negative differential conductance markedly blue-shifts with increasing B. doublet accounts for spin-polarized currents through Zeeman split channels InAs (GaSb) conduction (valence) band exhibits strong anisotropy respect B orientation marked temperature...
The experimentally retrieved value of the optical extinction cross section per unit length, σL,extNT, individual MoS2 multiwall nanotubes (NTs) is here reported over 440–940 nm wavelength range for light polarization both parallel and perpendicular to nanotube longitudinal axis. impact diameter environment on σL,extNT addressed with diameters 120 220 in suspended, sapphire-supported, PMMA-supported configurations. Measuring utmost importance given wide size dispersion intrinsic synthesis...
We investigated the inhomogeneities in charge density of unintentionally doped graphene on SiO2 prepared by mechanical exfoliation. From analysis G, D, and 2D phonon modes Raman spectra after displacing contaminants surface, measuring separation monolayer-substrate distance among zones with different doping levels, we deduce that interaction substrate is main cause rather than particle contamination. In particular, show how levels vary within same flake depending between substrate.
The mechanical vibrations of individual gold nanodisks nanopatterned on a sapphire substrate are investigated using ultrafast time-resolved optical spectroscopy. number and characteristics the detected acoustic modes found to vary with nanodisk geometry. In particular, their quality factors strongly depend aspect ratio (i.e., diameter over height ratio), reaching maximal value ≈70, higher than those previously measured for substrate-supported nano-objects. peculiarities confirmed by...
Abstract Here, the operation of a field‐effect transistor based on single InAs nanowire gated by an ionic liquid is reported. Liquid gating yields very efficient carrier modulation with transconductance value 30 times larger than standard back SiO 2 /Si ++ substrate. Thanks to this wide modulation, controlled evolution from semiconductor metallic‐like behavior in shown. This work provides first systematic study ionic‐liquid electronic devices individual III–V nanowires: architecture opens...
Ionic liquids can remove proteins and the cellulosic cell wall from pollen grains assuring grain integrity allowing direct functionalization of sporopollenin.
The control and measurement of local non-equilibrium configurations is utmost importance in applications on energy harvesting, thermoelectrics heat management nano-electronics. This challenging task can be achieved with the help various probes, prominent examples including superconducting or quantum dot based tunnel junctions, classical resistors, Raman thermography. Beyond time-averaged properties, valuable information also gained from spontaneous fluctuations current (noise). From these...
Abstract Thermoelectric polyelectrolytes are emerging as ideal material platform for self‐powered bio‐compatible electronic devices and sensors. However, despite the nanoscale nature of ionic thermodiffusion processes underlying thermoelectric efficiency boost in polyelectrolytes, to date no evidence direct probing diffusion on its relevant length time scale has been reported. This gap is bridged by developing heat‐driven hybrid nanotransistors based InAs nanowires embedded thermally biased...
Integrated photonics on Silicon-On-Insulator (SOI) substrates is a well developed research field that has already significantly impacted various fields, such as quantum computing, micro sensing devices, biosensing, and high-rate communications. Although quite complex circuits can be made with technology, everything based few ’building blocks’ which are then combined to form more circuits. This review article provides detailed examination of the state art integrated photonic building blocks...
Abstract Films of a few layers in thickness reduced graphite oxide (RGO) sheets functionalized by the zwitterionic surfactant N ‐dodecyl‐ , ‐dimethyl‐3‐ammonio‐1‐propanesulfonate (DDPS) are obtained using Langmuir–Blodgett method. The quality RGO is checked analyzing degrees reduction and defect repair means X‐ray photoelectron spectroscopy, atomic force microscopy (AFM), field‐emission scanning electron (SEM), micro‐Raman electrical conductivity measurements. A modified Hummers method used...