A5024180124- Advanced Sensor and Energy Harvesting Materials
- Analog and Mixed-Signal Circuit Design
- Sensor Technology and Measurement Systems
- Advancements in Semiconductor Devices and Circuit Design
- Gas Sensing Nanomaterials and Sensors
- Acoustic Wave Resonator Technologies
- ZnO doping and properties
- Mechanical and Optical Resonators
- Advanced MEMS and NEMS Technologies
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Sensors
- Conducting polymers and applications
- Innovative Energy Harvesting Technologies
- Radio Frequency Integrated Circuit Design
- Low-power high-performance VLSI design
- Thermal properties of materials
- Molecular Junctions and Nanostructures
- Analytical Chemistry and Chromatography
- Layered Double Hydroxides Synthesis and Applications
- CCD and CMOS Imaging Sensors
- Ferroelectric and Piezoelectric Materials
- Advanced Thermoelectric Materials and Devices
- Neuroscience and Neural Engineering
- Force Microscopy Techniques and Applications
- Advanced Memory and Neural Computing
University of Rome Tor Vergata
2014-2023
Institute of Acoustics and Sensors "Orso Mario Corbino"
2007-2015
Polytechnic University of Bari
2015
University of Palermo
2015
Instituto Politécnico Nacional
2015
Weatherford College
2012
Georgia Institute of Technology
2009
Peking University
2009
National Tsing Hua University
2009
University of L'Aquila
2008
In this work we analyze the coupled piezoelectric and semiconductive behavior of vertically aligned ZnO nanowires under uniform compression. The screening effect on field caused by free carriers in compressed zinc oxide (NWs) has been computed means both analytical considerations finite element calculations. We predict that, for typical geometries donor concentrations, length NW does not significantly influence maximum output piezopotential because potential mainly drops across tip, so that...
The piezopotential in floating, homogeneous, quasi-1D piezo-semiconductive nanostructures under axial stress is an anti-symmetric (i.e., odd) function of force. Here, after introducing piezo-nano-devices with floating electrodes for maximum piezo-potential, we show that breaking the nature piezopotential-force relation, instance by using conical nanowires, can lead to better nanogenerators, piezotronic and piezophototronic devices.
Layered Double Hydroxides (LDHs) have outstanding properties, including straightforward fabrication and connection of high-density arrays aligned nanostructures on almost every (e.g., large area flexible) substrates, high surface-to-volume ratios, biocompatibility, flame retardancy several degrees freedom (divalent trivalent cations, trivalent/divalent cations ratio, intercalated anions geometries) for tuning their properties as well band diagrams. Nevertheless, LDH pyroelectric devices...
The physical behaviors of stationary cells, such as the morphology, motility, adhesion, anchorage, invasion and metastasis, are likely to be important for governing their biological characteristics. A change in properties mammalian cells could an indication disease. In this paper, we present a silicon-nanowire-array based technique quantifying mechanical behavior single representing three distinct groups: normal benign (L929), malignant (HeLa). By culturing on top NW arrays, maximum traction...
The equilibrium piezoelectric potential distribution in a deformed ZnO semiconductive nanowire has been systematically investigated order to reveal its dependence on the donor concentration, applied force, and geometric parameters. In particular, concentration markedly affects magnitude of electric potential. At N D>1018 cm−3, piezopotential is almost entirely screened. Among other parameters, variation length does not significantly affect distribution.
The bioimpedances of tissues beyond the stratum corneum, which is outermost layer skin, contain crucial clinical information. Nevertheless, bioimpedance measurements both viable skin and adipose tissue are not widely used, mainly because complex multilayered structure electrically insulating nature corneum. Here, a theoretical framework established for analyzing impedances and, in particular, skin. Then, strategies determined system-level design electrodes electronics, minimize 4-wire (or...
Abstract Gates can electrostatically control charges inside two-dimensional materials. However, integrating independent gates typically requires depositing and patterning suitable insulators conductors. Moreover, after manufacturing, are unchangeable. Here we introduce tunnelling triboelectrification for localizing electric in very close proximity of As representative materials, use chemical vapour deposition graphene deposited on a SiO 2 /Si substrate. The triboelectric charges, generated...
Introduction: The early determination of serious pathologies has so far been an important issue in both the medical and social fields. search for instrument able to detect cancers led consideration usage chemicals human body, which carry, through its volatile compounds, information coming from or related defined pathologies.
Quasi-1D piezoelectric nanostructures may offer unprecedented sensitivity for transducing minuscule input mechanical forces into high output voltages due to both scaling laws and increased coefficients. However, until now theoretical experimental studies have suggested that, a given force, lateral bending of nanowires results in lower electric potentials than vertical compression. Here we demonstrate that this result only applies with constant cross-section. Moreover, though it is commonly...
We have grown nanostructured films of Zn/Al Layered Double Hydroxide (LDH) on different substrates by combining the deposition an aluminum micropatterned thin layer with a successive one‐step room‐temperature wet‐chemistry process. The resulting LDH film is made lamellar‐like nanoplatelets mainly oriented perpendicular to substrate. Since acts as both reactant and seed for synthesis LDH, growth can be easily confined submicrometric‐level resolution (about ±0.5 μ m) prepatterning conventional...
Resonant sensors with nanostructured surfaces have long been considered as an emergent platform for high-sensitivity transduction because of the potentially very large sensing areas. Nevertheless, until now only complex, time-consuming, expensive and sub-optimal fabrication procedures described; in fact, especially reference to in-liquid applications, few devices reported. Here, we first demonstrate that, by immersing standard, ultra-low-cost quartz resonators un-polished silver electrodes a...
A refined model of a mid-IR amplifier, constituted by tapered chalcogenide fiber coupled to an erbium-doped microsphere, is integrated with global solution search procedure based on particle swarm optimization approach. It implemented in computer code order obtain inversion algorithm useful evaluate the spectroscopic parameters rare-earth-doped glass microspheres. The rare earth can be recovered means optical gain measurement. error evaluation erbium lifetime τ <sub...