A5103123589- 2D Materials and Applications
- Graphene research and applications
- X-ray Diffraction in Crystallography
- MXene and MAX Phase Materials
- Crystallization and Solubility Studies
- Perovskite Materials and Applications
- ZnO doping and properties
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Quantum and electron transport phenomena
- Advanced Memory and Neural Computing
- Modular Robots and Swarm Intelligence
- Advancements in Semiconductor Devices and Circuit Design
- Plasmonic and Surface Plasmon Research
- Biosensors and Analytical Detection
- Ferroelectric and Negative Capacitance Devices
- Electrochemical sensors and biosensors
- Advanced Sensor and Energy Harvesting Materials
- Molecular Junctions and Nanostructures
- GaN-based semiconductor devices and materials
- Silicon Nanostructures and Photoluminescence
- Magnetic Field Sensors Techniques
- TiO2 Photocatalysis and Solar Cells
- Advanced Measurement and Detection Methods
Center for Nanotechnology Innovation
2020-2024
Italian Institute of Technology
2020-2024
University of Pavia
2003-2021
DuPont (United States)
1994
Out of the different structural phases molybdenum ditelluride (MoTe
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...
Paper is the ideal substrate for development of flexible and environmentally sustainable ubiquitous electronic systems, which, combined with two-dimensional materials, could be exploited in many Internet-of-Things applications, ranging from wearable electronics to smart packaging. Here we report high-performance MoS2 field-effect transistors on paper fabricated a channel-array approach, combining advantages two large-area techniques: chemical vapor deposition inkjet-printing.The first allows...
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...
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...
Two-dimensional semiconductors are gaining increasing interest for their potential application in several fields. In particular, when combined with graphene into vertical van der Waals heterostructures, they have demonstrated unique properties, such as large spin–orbit coupling at the valence band maximum and ultrafast charge transfer. An understanding of WS2 stability on epitaxial ambient conditions is crucial development applications. this work, we study environmental aging related...
In a dye-sensitized solar cell (DSSC) the amount of adsorbed dye on photoanode surface is key factor that must be maximized in order to obtain enhanced DSSC performance. this study 3D ZnO nanostructures, named brush-like, are demonstrated as alternative photoanodes. these structures, long nanorods covered with metal-organic precursor, known layered-hydroxide zinc salt (LHZS), which subsequently converted crystalline using two-step annealing. The LHZS able easily grow any surface, such...
Heterostacks composed of two-dimensional WS2 and graphene exhibit interesting opto-electronic properties, including ultrafast charge transfer fast, efficient photodetection. The optical properties are heavily influenced by the presence in heterostack, yet, so far, their characterization whole visible range is missing. In this work we report complex dielectric function flakes on epitaxial silicon carbide, obtained means spectroscopic ellipsometry (SE). so-called A, B C excitonic features...
We demonstrate a graphene–MoS2 architecture integrating multiple field-effect transistors (FETs), and we independently probe correlate the conducting properties of van der Waals coupled contacts with those MoS2 channels. Devices are fabricated starting from high-quality single-crystal monolayers grown by chemical vapor deposition. The heterojunction was investigated scanning Raman photoluminescence spectroscopies. Moreover, transconductance curves compared current–voltage characteristics...
Abstract The opto‐electronic properties of semiconducting 2D materials can be flexibly manipulated by engineering the atomic‐scale environment. This done including in tailored van der Waals (vdW) stacks, whose optical response is a function number and type adjacent layers. work reports systematic investigation dielectric WS 2 various stacking configurations: monolayer, 3R/2H homobilayer, /MoS heterobilayer. Reliable, Kramers–Kronig‐consistent functions are obtained for each configuration...
Monolayer tungsten disulfide (WS2) has recently attracted a great deal of interest as promising material for advanced electronic and optoelectronic devices such photodetectors, modulators, sensors. Since these can be integrated in silicon (Si) chip via back-end-of-line (BEOL) processes, the stability monolayer WS2 BEOL fabrication conditions should studied. In this work, thermal single-crystal at typical is investigated; namely (a) heating temperature 300 °C, (b) pressures medium- (10−3...
Hexagonal boron nitride (hBN), sometimes referred to as white graphene, receives growing interest in the scientific community, especially when combined into van der Waals (vdW) homo- and heterostacks, which novel interesting phenomena may arise. hBN is also commonly used combination with two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDCs). The realization of hBN-encapsulated TMDC heterostacks can indeed offer opportunities investigate compare excitonic properties...
The combination of metallic nanostructures with two-dimensional transition metal dichalcogenides is an efficient way to make the optical properties latter more appealing for opto-electronic applications. In this work, we investigate monolayer WS2 flakes grown by chemical vapour deposition and transferred onto a densely-packed array plasmonic Au nanoparticles (NPs). response was measured as function thickness dielectric spacer intercalated between two materials system temperature, in 75–350 K...
Abstract Core–shell structures with ZnO cores have been widely investigated due to their effectiveness in suppressing surface defects of nanostructures. As the are hugely dependent on synthesis conditions, it is important understand interactions between shell material and different chemistry. Here we produce well-aligned nanorods using two growth methods, leading chemistries. A thin layer TiO 2 applied via layer-by-layer adsorption method. The core–shell structure confirmed high-resolution...
Single-layer tungsten disulfide (WS
Monolayer tungsten disulfide ($WS_2$) has recently attracted large interest as a promising material for advanced electronic and optoelectronic devices such photodetectors, modulators, sensors. Since these can be integrated in silicon (Si) chip via back-end-of-line (BEOL) processes, the stability of monolayer $WS_2$ BEOL fabrication conditions should studied. In this work, thermal single-crystal at typical is investigated; namely (i) heating temperature $300$ $^\circ C$, (ii) pressures...
This article presents the work developed as degree thesis in informatic engineering that has been carried out at Laboratory of Artificial Vision Department Informatica and Sistemistica University Pavia, years 1997 1998. The paper describes an artificial vision system based on generalized Hough transform to find position orientation hydraulic components with aim driving a mechanical arm positioning repositioning operations. A prototype this successfully integrated existing industrial robot...