Abstract This paper investigates the state-of-the-art of graphene-based technologies for prospective use cases end-to-end terahertz (THz) communication systems, such as industrial Internet Things (IoT) applications and unmanned aerial vehicles (UAVs). THz communications offer ultra-high throughput enhanced sensing capabilities, enabling advanced like UAV swarms integrated sensing, localization, mapping. The potential wireless can be unlocked by graphene technology. Graphene, owing to its...

Uniform electric field distribution in electroporation is crucial for achieving the effective localized delivery of drug molecules. Currently, vitro studies on adherent cells lack a standardized test setup obtaining consistent and repeatable results, unlike cell suspensions that use cuvettes, which provide uniform distribution. Considering this, we designed, built, tested novel inset design low-volume round well plates, such as 24- 96-well plates are most commonly used culture labs. The was...

The ambipolar conduction property of graphene field-effect transistors (GFETs) and the inherent square-like dependence drain current on gate voltage, enable development single-device architectures for analog nonlinear radiofrequency (RF) circuits. use GFETs in novel RF component topologies allows leveraging graphene’s attractive thermal mechanical properties to improve miniaturization weight reduction electronic components. These features are specifically appealing integrated sensing,...

The rise of the Internet Things (IoT) has enabled development measurement systems dedicated to preventing health issues and monitoring conditions in smart homes workplaces. IoT can support people doing computer-based work avoid insurgence common musculoskeletal disorders related persistence incorrect sitting postures during hours. This proposes a low-cost system for posture symmetry generating visual alert warn worker when an asymmetric position is detected. employs four force sensing...

The interest in graphene-based electronics is due to graphene's great carrier mobility, atomic thickness, resistance radiation, and tolerance extreme temperatures. These characteristics enable the development of extremely miniaturized high-performing electronic devices for next-generation radiofrequency (RF) communication systems. main building block graphene-field effect transistor (GFET). An important issue hindering diffusion GFET-based circuits on a commercial level repeatability...

The electromagnetic properties and behavior of nanomaterials nanomaterial-based devices are simulated using analytical models numerical methods. Graphene the most explored, with several different proposed applications. To design a graphene-based device that meets specific functional requirements, reliable take into account geometry device, in addition to graphene. In this way, simulation response based on variations geometrical parameters is possible. Among existing techniques, finite...

Abstract This paper studies the effect of lightning impact on aircraft fuselage made innovative Carbon Fibers Reinforced Composites (CFRC) panels, as an alternative to traditional metal structures. Metal layers are able dissipate current generated by impacting structure, whereas multilayer CFRC panels less conductive and therefore have limited capacity for dissipation. study presents a time-varying thermal simulation coupled with electromagnetic simulation, considering different currents...

In this paper, we present a bolt preload monitoring system, including the system architecture and algorithms. We show how Finite Element Method (FEM) simulations aided design processed signals to achieve experimental validation. The is measured using Piezoelectric Micromachined Ultrasonic Transducer (PMUT) in pulse-echo mode, by detecting Change Time-of-Flight (CTOF) of acoustic wave generated PMUT, between no-load load conditions. performed FEM analyze propagation inside understand effect...

Microbolometers, functioning as sensitive detectors, play a crucial role in terahertz imaging systems by converting radiation into measurable electrical signals. The performance of microbolometers heavily relies on the properties absorber material employed. In this study, we numerically investigate impact two distinct materials, namely gold and pyrolytic carbon (PyC), microbolometers. Finite element simulations are conducted to analyze effect thermal transient time constant, that is limiting...

Density is a characteristic property of substance related to its mass and volume. On-line density sensors play an important role in several industrial applications, for example the monitoring liquid products. In this work resonant sensor measure liquids proposed. The active element piezoelectric bimorph, extensively used buzzers telephone receivers. border bimorph clamped into steel structure, designed realize open chamber which poured. By fixing volume chamber, also fixed; thus, variation...

We report the performance of a graphene-enhanced THz grating fabricated by depositing gold layer on femtosecond micromachined SiO2 substrate. The morphology plated patterned substrate was studied scanning electron microscopy (SEM) and atomic force (AFM), while quality chemical vapor deposition (CVD) graphene evaluated Raman spectroscopy. electromagnetic (EM) response metasurface comprising sheet time domain spectroscopy in 100 GHz-1 frequency range. employed finite elements method (FEM) to...

A smart cushion for the monitoring of sitting posture symmetry is presented that well suited to possibilities enabled by IoT Industry 4.0 paradigm. The system, developed improve worker's health preservation preventing low-back pain may be caused prolonged asymmetrical sitting, consists a equipped with four force sensors, interfaced an Arduino Mega® board, and Java-based computer program user-friendly GUI. software checks exerted on two sides seat, notifying user when appreciable asymmetry...

Density is one of the characteristic properties a substance and on-line density sensors are interest in many industrial fields. In this paper, piezoelectric sensor proposed analyzed with FE methods experimentally. The active element cheap piezoceramic bimorph, widely used buzzers telephone receivers; bimorph clamped all around tightening its border to edge rigid open chamber which liquid poured. resonance flexural frequency membrane modified by mass, volume therefore mass can be obtained...

Front-face acoustic reflectivity of ultrasonic imaging transducers, due to impedance mismatch with the propagation medium, may cause reverberation phenomena during wideband pulse-echo operation. be reduced by promoting transmission echoes, received from transducer backing, and maximizing mechanical-to-electrical energy conversion dissipation tuning electrical load connected transducer. In Capacitive Micromachined Ultrasonic Transducers (CMUTs), transfer medium backing is very low large...

Liquids density measurements are highly required in both research and industrial applications, from process control petrochemical industry to product monitoring food processing. Commercial devices often expensive or unwieldy; therefore, a previous work, cheap handy resonant sensor, based on piezoelectric bimorph, was introduced. The operating principle is the variation of device electrical impedance, due liquid mass. By fixing volume, frequency can therefore be related density. maximum...

Abstract Due to the high carrier mobility, graphene is considered a promising material for use in high-speed electronic devices post-silicon era. Graphene resistance radiation and extreme temperatures makes development of graphene-based electronics key-enabling technology aerospace, defence, aeronautical applications. Nevertheless, achieving uniform device-to-device performance still challenge, these fields require reliability components. In particular, many critical issues remain be solved,...

This study explores the influence of geometric variations on electromagnetic response a graphene-enhanced grating in terahertz frequency range, view supporting development high-performing passive devices for advanced applications. The investigation is addressed by performing Terahertz Time-Domain Spectroscopy (TTDS) measurements, which dimension grating's geometry and thickness gold reflector vary according to factorial design. analysis provides insights into interplay between metamaterial...

This paper addresses the assessment of variability CMUT arrays' electro-mechanical and acoustic performance, as related to tolerance vertical dimensions due microfabrication process. A 3-factors 3-levels factorial sensitivity analysis is carried out compute main effects interaction moving plate thickness, passivation layers sacrificial layer on resonance frequency, collapse voltage, static capacitance, well transmission reception amplitude bandwidth time delay in water-coupled condition. The...

As CMUT technology moves towards the industrial phase, robustness of fabrication process becomes a key aspect to produce reliable and well-performing devices. arrays typically show variability electromechanical acoustic behavior among transducer elements, which is mainly ascribed tolerances process-related parameters. This paper investigates impact parameters on performance arrays, by proposing local sensitivity analysis technique performed according Design Experiments (DoE) approach based...

In this work, we propose the investigation of terahertz performance a graphene-based multilayer metasurface, assessing reflection and absorption capability considered structure in view designing robust passive device for manipulation THz radiation. particular, develop Finite Element Method (FEM)-based model patterned SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> /gold/PMMA/graphene/PMMA use it to assess electromagnetic response...

Among the various applications of carbon nanotubes (CNTs) that have been investigated since discovery their exceptional potential in electronic field, great interest has directed towards creation carbon-based materials capable replacing Indium Tin Oxide (ITO) as a transparent electrode. Such conductive films find application touch panels, LCD screens, OLED displays, photovoltaic cells, and many others. This review presents collection techniques proposed during last decade for modeling...

Abstract In the growing scenario of 2D material-based metamaterials and metasurfaces for Terahertz (THz) applications, assessing impact ageing wear due to environmental stressors on components’ performance is becoming mandatory understand long-term reliability novel technologies. This paper introduces approaches assess effects THz passive components through numerical simulations. For this purpose, common techniques introducing materials thin metal layers in models are discussed. As a case...