A5024454799- Graphene research and applications
- Electromagnetic wave absorption materials
- Carbon Nanotubes in Composites
- Advanced Antenna and Metasurface Technologies
- Structural Health Monitoring Techniques
- Fiber-reinforced polymer composites
- Advanced Sensor and Energy Harvesting Materials
- Thermal properties of materials
- Analytical Chemistry and Sensors
- Graphene and Nanomaterials Applications
- Infrastructure Maintenance and Monitoring
- Membrane Separation Technologies
- Dielectric materials and actuators
- Electrochemical sensors and biosensors
- Supercapacitor Materials and Fabrication
- Electrochemical Analysis and Applications
- Molecular Junctions and Nanostructures
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Quantum and electron transport phenomena
- Gas Sensing Nanomaterials and Sensors
- Smart Materials for Construction
- 3D Surveying and Cultural Heritage
- Material Properties and Applications
- Energy Harvesting in Wireless Networks
National Agency for New Technologies, Energy and Sustainable Economic Development
2022-2025
ENEA Casaccia Research Centre
2022-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2014-2023
Marche Polytechnic University
2019-2022
Istituto Nazionale di Fisica Nucleare
2020-2021
Frascati Scienza
2020
University of Chieti-Pescara
2017-2019
University of Palermo
2015-2016
Università degli studi di Cassino e del Lazio Meridionale
2015-2016
This paper presents the design and fabrication of a broadband microstrip attenuator, operating at 1-20 GHz, based on few layer graphene flakes. The RF performance attenuator has been analyzed in depth. In particular, use as variable resistor is discussed experimentally characterized microwave frequencies. structure graphene-based integrates micrometric flakes deposited an air gap line. As highlighted experiments, film can range from being discrete conductor to highly resistive material,...
This letter presents a voltage-controlled tunable planar antenna based on few-layer graphene flakes. The consists of rectangular patch with shorted microstrip stub connected to the radiating edge, and pad located at input stub. proposed design exploits variation resistance by an applied bias voltage. Without any voltage, behaves almost as open circuit, not allowing current passing and, thus, voiding impact Increasing voltage reduces resistance, thus increasing through into results in...
This letter presents a voltage-controlled tunable attenuator based on few layer graphene flakes. The proposed structure exploits the variation of resistance with an applied bias voltage. consists microstrip line, connected to grounded metal vias through pads: when no voltage is applied, high and pads behave as open circuits, causing minimum attenuation. By increasing voltage, decreases, connecting microstrip, thus A prototype operating in frequency band from dc 5 GHz has been designed...
A comprehensive analysis of electrical, electromagnetic (EM), mechanical, and thermal properties epoxy resin composites filled with 0.25–2.0 wt. % carbon additives characterized by high surface area, both nano-sized, like nanotubes (CNTs) black (CBH), micro-sized exfoliated graphite (EG), was performed. We found that the physical CNTs- CBH-based increased all together filler content even more clearly for CBH than CNTs. In case EG-based composites, good correlation between amount observed...
The wide application of microwaves stimulates searching for new materials with high electrical conductivity and electromagnetic (EM) interference shielding effectiveness (SE). We conducted a comparative study EM SE in K -band demonstrated by ultra-light micro-structural porous carbon solids (carbon foams) different bulk densities, 0.042 to 0.150 g/cm 3 , conventional flexible epoxy resin filled nanotubes (CNTs) small concentrations, 1.5 wt.%. Microwave probing foams showed that the...
Nanocomposites are nowadays one of the most promising materials. Among different fillers, e.g. carbon nanotubes and silicon carbide nanowires (NWSiC), already used with epoxy resin matrices, graphene exfoliated graphite (EG) nanoplates have some characteristics that make them unique for electromagnetic shielding However, there is still an unresolved problem proper dispersion will ensure homogeneity samples. To overcome this drawback, inorganic fibres were proposed. An amount 0.25 phr (parts...
The present work deals with the measurement of thermo-physical properties a freestanding sheet graphene (thermal diffusivity and thermal conductivity), their dependence on sample density as result uniform mechanical compression. Thermal nano-platelets (thin slabs) was measured by pulse flash method. Obtained response data were processed specifically developed least square processing algorithm. GNP specific heat assumed from literature conductivity derived diffusivity, density. results show...
We propose a bottom-up procedure to fabricate an easy-to-engineer graphene-based device, consisting of microstrip-like circuit where few-layer graphene nanoplatelets are used contact two copper electrodes. The obtained by the microwave irradiation intercalated graphite, i.e., environmentally friendly, fast and low-cost procedure. is created process, driven application DC electrical field in gap between electrodes, yielding formation carpet. resistance device has been measured as function...
Water pollution is nowadays a global problem and the effective detection of pollutants fundamental importance. Herein, facile, efficient, robust, rapid (response time < 2 min) method for determination important quinone-based industrial such as hydroquinone benzoquinone reported. The recognition based on use screen-printed electrodes sensing platforms, enhanced with carbon-based nanomaterials. enhancement achieved by modifying working electrode platforms through highly sensitive membranes...
This letter presents a voltage-controlled tunable phase shifter based on few-layer graphene. The consists of stub-loaded line, composed microstrip line with stub attached to it through taper and graphene pad. bias voltage applied the pad determines variation resistance, which eventually causes change. Without any bias, exhibits high thus isolating leading low shift. As is increased, resistance lowered, effect more pronounced, shift increased. A prototype operating in frequency range from 5 6...
Composite materials based on epoxy resin filled with various kinds of graphite particles: exfoliated graphite, natural and coarse, medium fine artificial graphites have been prepared. Results broadband dielectric investigations such in wide temperature (25–450 K) frequency (20 Hz–3 THz) ranges are presented. The permittivity strongly increases particle size. size shape also a strong impact freezing temperature, conductivity activation energy composite electromagnetic absorption properties at...
One of the most appealing properties carbon nanotube (CNT) interconnects is possibility exhibiting, under certain circumstances, a negative temperature coefficient electrical resistance, i.e., resistance that decreases as increases. In past, this behavior has been theoretically predicted and experimentally observed, but only for class CNTs, with short lengths (up to some micrometers) in limited range temperature. This paper demonstrates obtaining such desirable larger scale fractions...
Background: The blood–brain barrier (BBB) bypass of dopamine (DA) is still a challenge for supplying it to the neurons Substantia Nigra mainly affected by Parkinson disease. DA prodrugs have been studied cross BBB, overcoming limitations hydrophilicity. Therefore, aim this work synthesis and preliminary characterization an oxidized alginate-dopamine (AlgOX-DA) conjugate conceived nose-to-brain delivery. Methods: A Schiff base was designed connect polymeric backbone both AlgOX AlgOX-DA were...
The paper explores the potential of a low-cost advanced video-based technique for assessment structural damage induced to buildings by seismic loading. A high-speed video camera was utilized motion magnification (MM) processing footages two-story reinforced concrete frame building subjected shaking table tests. after loading estimated analyzing dynamic behavior (i.e. in terms modal parameters) and deformations MM videos. results were compared method validation obtained analyses conventional...
Thermal diffusivity of GNPs (graphene nano-platelets) is an important thermo-physical property as it useful to predict the material behavior in many heat transfer applications. GNP samples were pressed at different loads obtain densities, and then thermal was measured with flash method. All coated a thin layer (~1 µm) colloidal graphite (Aquadag®) on both sides reduce reflectance their surfaces consequently increase emissivity. Carrying out measurements without coating, difference between...
The use of carbon nanomaterials (CNMs) in sensors and biosensor realization is one the hottest topics today analytical chemistry. In this work, a comparative in-depth study, exploiting different nanomaterial (MWNT-CO2H, -NH2, -OH GNP) modified screen-printed electrodes (SPEs), reported. particular, sensitivity, heterogeneous electron transfer constant (k0), peak-to-peak separation (ΔE) have been calculated analyzed. After which, an electrochemical amperometric sensor capable determining uric...
Artistic masterpieces are mostly collected in museums located the center of urban areas, which prone to heavy traffic. Traffic-induced vibrations can represent a significant hazard for museum objects, due repeated nature excitation and brittle, pre-damaged condition artifacts. This is case Sarcophagus Spouses, displayed at National Etruscan Museum Villa Giulia Rome. Vibrations on floor room measured by means velocimeters, highlighting substantial vertical amplitudes recommending design an...
Results of broadband electric/dielectric properties different surface area—carbon black/epoxy resin composites above the percolation threshold are reported in a wide temperature range (25–500 K). At higher temperatures (above 400 K), electrical conductivity is governed by transport polymer matrix and current carriers tunneling from carbon black clusters to matrix. The activation energy such processes decreases when carrier concentration increases, i.e., with increase concentration. lower...
This article presents novel tunable microstrip attenuators based on few-layer graphene. The proposed topology consists of a line sided by pairs grounded metal vias, with graphene pads located between the and vias. possibility to control resistance through an applied bias voltage is exploited aim modify insertion loss attenuators. Several vias are adopted achieve large tuning range, good input matching, broadband operation. A systematic investigation structure two, three, four presented,...
This paper explores the potential of a low-cost, advanced video-based technique for assessment structural damage to buildings caused by seismic loading. A high-speed video camera was utilized motion magnification processing footage two-story reinforced-concrete frame building subjected shaking table tests. The after loading estimated analyzing dynamic behavior (i.e., modal parameters) and deformations in magnified videos. results using procedure were compared validation method obtained...