A5084151217- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- Acoustic Wave Resonator Technologies
- Neuroscience and Neural Engineering
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Antenna Design and Analysis
- Neurological disorders and treatments
- Microwave Engineering and Waveguides
- Advanced Sensor and Energy Harvesting Materials
- Wireless Body Area Networks
- Advanced MEMS and NEMS Technologies
- Transcranial Magnetic Stimulation Studies
- Innovative Energy Harvesting Technologies
- Advanced Memory and Neural Computing
- Advanced Antenna and Metasurface Technologies
- Electric Motor Design and Analysis
- Magneto-Optical Properties and Applications
- Gas Sensing Nanomaterials and Sensors
- Phase-change materials and chalcogenides
- Perovskite Materials and Applications
- Magnetic Properties of Alloys
- Analytical Chemistry and Sensors
- Heusler alloys: electronic and magnetic properties
- Liquid Crystal Research Advancements
Northeastern University
2018-2023
Massachusetts General Hospital
2020-2023
Harvard University
2020-2023
A novel very low frequency (VLF) communication system using one pair of magnetoelectric (ME) antennas has been proposed. The ME are strain-mediated acoustic resonators operating at their electromechanical resonance in the VLF band. measured near-field radiation pattern reveals equivalent to dipole antennas. magnetic field radiated by transmitter predicted along with distance ranging from 1 mm 100 km. distribution coincided well prediction, and maximum 120 m achieved. With 80 V driving...
Abstract Ultra-compact wireless implantable medical devices are in great demand for healthcare applications, particular neural recording and stimulation. Current technologies based on miniaturized micro-coils suffer from low power transfer efficiency (PTE) not always compliant with the specific absorption rate imposed by Federal Communications Commission. Moreover, current reliant differential of voltage or across space require direct contact between electrode tissue. Here, we show an...
A major obstacle during the design of brain- computer interfaces is unavailability a neural implantable device that μ-scale in size and wireless, self-powered, long-lasting. The current state-of-the-art devices suffer from various limitations. Electromagnetic-based wireless are big because their large antenna, which must be larger than one-tenth wavelength operational frequency. Ultrasound-based devices, addition to low data rate, have massive loss skull need an intermediate electromagnetic...
Significant effort has been put into the antenna miniaturization. Electrically small antennas still suffer from various issues, such as a relatively large physical size. Hence, designs based on different radiation mechanisms have attracted more attention, and mechanical is one feasible solution. A review of conventional miniaturization developments in methods presented this paper. The topic focus resonance magnetoelectric (ME) coupling within piezoelectric/ferromagnetic ME composite. This...
Abstract Since the discovery of strong magnetoelectric (ME) coupling in two‐phase ME laminate composites, strain mediated heterostructures have found practical applications magnetic sensors, tunable inductors, filters, miniaturized antennas, memories, and nanoscale motors. Thin film particular, become promising candidates biomagnetic sensing, due to their high sensitivity, CMOS compatibility, room temperature operation, spatial resolution. In this article, an overview is presented on...
The miniaturization of antennas has been a significant challenge in the field electronics and telecommunications. In recent years, mechanically driven thin‐film bulk acoustic resonator (FBAR) magnetoelectric (ME) have emerged as promising solution, demonstrating superior capabilities compared to conventional state‐of‐the‐art compact antennas. While nanoelectromechanical systems (NEMS) FBAR ME exhibit high potential, their suspended heterostructures render them fragile low power handling...
A great challenge in power/RF electronics has been achieving integrated magnetic inductors with high quality factor (Q-factor) and inductance density at gigahertz frequencies. In this article, solenoid magnetoelectric based on FeGaB/Al2O3 multilayer as the core are designed to operate frequencies, Q-factor, tunability. self-resonant frequency of >3 GHz a flat 1.4 nH peak Q-factor ~32.7 achieved within wide operating ranging from 0.3 3 annealing treatment enhance Q-factor. Two different...
Objective. Noninvasive focal stimulation of deep brain regions has been a major goal for neuroscience and neuromodulation in the past three decades. Transcranial magnetic (TMS), instance, cannot target without activating overlying tissues poor spatial resolution. In this manuscript, we propose new concept that relies on temporal interference (TI) two high-frequency fields generated by electromagnetic solenoids.Approach. To illustrate concept, custom solenoids were fabricated optimized to...
A magnetoelectric antenna (ME) can exhibit the dual capabilities of wireless energy harvesting and sensing at different frequencies. In this article, a behavioral circuit model for hybrid ME antennas is described to emulate radio frequency (RF) operations during simulations. The work interfaced with CMOS harvester chip towards goal developing communication link fully integrated implantable devices. One role system receive pulse-modulated power from nearby transmitter, another sense transmit...
Abstract Flexible tactile sensor has been extensively investigated as a key component for emerging electronics applications such robotics, wearable devices, computer hardware, and security systems. Tactile sensors based on various one-dimensional materials have widely explored. However, precise control of the direction distribution these nanomaterials remains great challenge, it difficult to scale down device. Here, we introduce highly sensitive integrated flexible uniform phase-change Ge 2...
Alzheimer’s disease (AD) is a neurodegenerative disease, which affects millions of people worldwide. Curing this has not gained much success so far. Exhaled breath gas analysis offers an inexpensive, noninvasive, and immediate method for detecting large number diseases, including AD. In paper, new proposed to detect butylated hydroxytoluene (BHT) in the air, one chemicals found print AD patients. A three-layer sensor was formed through deposition thin layer graphene onto glassy carbon...
Antenna miniaturization is one of the fundamental challenges for decades [1]. Conventional small antennas use electric current radiation which relies on electromagnetic wave resonance that leads to antenna sizes comparable wavelength λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> . In 2017, we demonstrated a new mechanism [2] acoustically actuated nanome-chanical magnetoelectric (ME) with released ferromagnetic / piezoelectric thin...
Abstract Electrical stimulation via invasive microelectrodes is commonly used to treat a wide range of neurological and psychiatric conditions. Despite its remarkable success, the performance not sustainable since electrodes become encapsulated by gliosis due foreign body reactions. Magnetic overcomes these limitations eliminating need for metal-electrode contact. Here, we demonstrate novel microfabricated solenoid inductor (80 µm × 40 µm) with magnetic core that can activate neuronal...
Miniaturized piezoelectric/magnetostrictive contour-mode resonators have been shown to be effective magnetometers by exploiting the ΔE effect. With dimensions of ~100-200 μm across and <1 thick, they offer high spatial resolution, portability, low power consumption, cost. However, a thorough understanding magnetic material behavior in these devices has lacking, hindering performance optimization. This manuscript reports on strong, nonlinear correlation observed between frequency response...
The nonreciprocal bandpass filter has been achieved by utilizing the nonreciprocity characteristics of magnetostatic surface wave (MSSW) in planar ferrite slabs. In this article, dispersion relation, impedance, and attenuation MSSW between pure metallized slabs have analyzed compared. Theoretical analysis indicates that slab a thin conductive layer would introduce significant on interface, which is propagating isolated direction, while other barely affected. Therefore, with enhanced...
This paper introduces a behavioral circuit model for magnetoelectric (ME) antenna, which is novel miniaturized device with applications in low-power sensing. To facilitate the design of integrated circuits interfaced to its accounts amplitude modulation behavior observed during measurements nanoelectromechanical system (NEMS) when subjected an AC magnetic field and DC biasing field. We propose dynamic transient simulations, show that characteristics match experimentally obtained ME antenna....
Antenna miniaturization is one of the fundamental challenges for decades [1]. Conventional small antennas use electric current radiation which relies on electromagnetic wave resonance that leads to antenna sizes comparable wavelength λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> . In 2017, we demonstrated a new mechanism [2] acoustically actuated nanomechanical magnetoelectric (ME) with released ferromagnetic / piezoelectric thin...
This article describes the development of a radio frequency (RF) platform for electromagnetically modulated signals that makes use software-defined (SDR) to receive information from novel magnetoelectric (ME) antenna capable sensing low-frequency magnetic fields with ultra-low magnitudes. The is employed as part research and utilize miniaturized ME antennas integrated circuits neural recording wireless implantable devices. To prototype reception sensor, versatile Universal Software Radio...
A novel wireless and implantable neural modulation device called NanoNeuroRFID is introduced. Neuronal recording via this based on direct magnetic field detection data communication with external receiver through electromagnetic waves. Conventional state-of-the-art antennas have a size of greater than one-tenth the wavelength are so massive for brain implantation. Magnetoelectric (ME) antenna, core component NanoNeuroRFID, however, an acoustically actuated ultra-compact antenna could be...
Abstract Ultra-compact wireless implantable medical devices (IMDs) are in great demand for healthcare applications, particular neural recording and stimulation. Current technologies based on miniaturized micro-coils suffer from low power transfer efficiency (PTE) not always compliant with the specific absorption rate imposed by Federal Communications Commission, particularly deep brain implantation where field attenuation tissue loss significant. Moreover, current reliant recordings of...
In article number 2300425, Nian X. Sun and co-workers present magnetoelectric (ME) antennas that receive transmit electromagnetic waves through the ME effect at their acoustic resonance frequencies. The dramatic miniaturization, high power handling, robust mechanical properties much higher antenna radiation gain, make solid-mounted resonator-based a promising candidate for future systems, such as bio-implantable devices, internet of things, smart wearable systems.
A novel acoustic noise dosimeter is presented in this letter to investigate and measure the sound level that damages human hearing. miniaturized magnetoelectric (ME) antenna utilized sense through nonlinear modulation around operating resonance frequency of 63.6 MHz. Applied 102 dBA at two different 300 kHz 1 frequencies results 33.8 dB 28.7 signal ratio. In addition, fabricated provides a high 2.49 GHz for energy harvesting communications.
Most of the next-generation implantable medical devices that are targeting sub-mm scale form factors entirely powered wirelessly. The most commonly used wireless power transfer for ultra-small receivers is inductive coupling and has been so many decades. This might change with advent novel microfabricated magnetoelectric (ME) antennas which showing great potential as high-frequency receivers. In this paper, we compare these two delivery methods using operate at 2.52 GHz a surface area 0.043...