Articles tagged with Piezoelectricity
Researchers developed flexible piezoelectric acoustic sensors for improved speaker recognition, achieving sensitivity over two times higher than conventional sensors. These sensors enable 97.5% accurate speaker recognition and diverse voice detection in various environments.
Engineers at the University of British Columbia have developed a new ultrasound transducer that could lower costs to as low as $100. The device uses tiny vibrating drums made of polymer resin, reducing manufacturing costs.
Researchers developed a simple, inexpensive technique to create large-scale sheets of two-dimensional piezoelectric material, allowing integration onto silicon chips and expansion into surface manufacturing. The method enables the production of free-standing GaPO4 nanosheets for piezo-sensors and energy harvesting applications.
Researchers at Penn State have developed a wearable device that harnesses energy from the swing of an arm while walking or jogging, producing enough power to run a personal health monitoring system. The device is more efficient than standard electromagnetic harvesters and can sustain high strains without cracking.
Researchers at Penn State developed a new composite material that can efficiently harvest mechanical and thermal energy using a 3D piezoelectric ceramic foam supported by a flexible polymer. The material outperforms traditional piezoelectric composites, offering improved flexibility and energy output.
Researchers at Chalmers University of Technology have developed a fabric that converts kinetic energy into electric power. The textile generates electricity when stretched or exposed to pressure, and can currently light an LED, send wireless signals, or drive small electric units.
Researchers at Penn State designed a new material with twice the piezo response of existing commercial ferroelectric ceramics. The material's unique structure increases its dielectric properties and piezoelectric effect, making it suitable for medical ultrasound applications.
Researchers from IOCB Prague and IP CAS demonstrate a strong converse piezoelectric effect at individual molecules of heptahelicene derivative on a silver surface. The study provides new insights into the electromechanical behavior of individual molecules, opening up possibilities for nanoscale molecular devices.
Researchers have created a composite material with the best piezoelectric properties today, overcoming lead content and weight limitations. The material's polymer component offers advantages in manufacturing and application, making it suitable for high-pressure sensing applications.
KAUST researchers have created boron-nitride-based alloys with tunable polarization, a crucial property for computer memory. By varying the atomic composition, they can control the spontaneous polarization and piezoelectric constants of these materials.
UConn researchers have created a biodegradable pressure sensor that can be implanted in the body to monitor conditions like chronic lung disease and swelling of the brain. The sensor emits a small electrical charge when pressure is applied, allowing for non-invasive monitoring and potential treatment via electrical stimulation.
Researchers have developed a surface acoustic wave (SAW) device that can achieve frequencies six times higher than most current devices, thanks to the use of embedded interdigital transducers (IDTs). The device also boosts output power by 10 percent compared to conventional devices.
Irish researchers have discovered that glycine, the simplest amino acid, can generate enough electricity to power electrical devices when tapped or squeezed. This discovery has significant implications for the development of environmentally sustainable and low-cost bio-piezoelectric devices.
Scientists from Ural Federal University and the University of Limerick proved that lysozyme exhibits piezoelectric properties, generating electric charges that can power pacemakers and stimulate nerve endings. This discovery has implications for various biomedical applications, including biosensors for disease detection.
Researchers at Pennsylvania State University have developed a novel technique for connecting piezoelectric thin films to flexible polymer substrates, reducing substrate clamping and improving material properties. The new method enables the creation of miniaturized piezoelectric devices with enhanced performance and flexibility.
Researchers at Universitat Autonoma de Barcelona discovered that reversing the orientation of polar crystals can reduce their indentation toughness, making them easier to dent. This effect can be achieved by applying an external voltage or simply turning the material upside down.
A recent study using the Sawyer-Tower technique finds no signs of piezoelectricity or ferroelectricity in pig aorta. The researchers tested the tissue's electromechanical properties and found it behaves like a standard dielectric material.
Researchers at the University of Limerick have discovered that applying pressure to crystals of lysozyme, a protein found in egg whites and tears, can generate electricity. This finding has significant implications for innovative applications such as electroactive coatings for medical implants.
Researchers from Shahid Charmran University of Ahvaz in Iran have modeled new piezoelectric energy harvester (PEH) technology at the nano-scale level. Their study demonstrates how small-scale dimensions impact nonlinear vibrations and PEH voltage harvesting, revealing significant size effects on output.
A team of researchers has developed a novel type of memory called magnetoelectric memory, which reduces energy consumption by a factor of 10,000. This breakthrough technology could enable instant device startup and lower energy costs in computing hardware applications.
A team of researchers at the University of Pennsylvania has created the most thorough model to date of how smart materials work in ultrasound technology. They found striking similarities with the behavior of water, which could lead to new materials design and higher quality piezoelectrics.
A team of University College London researchers created a method for generating ultrasound via the photoacoustic effect by tailoring optoacoustic surface profiles. They used 3D printing to create samples with specific shapes, allowing them to control where sound fields would focus and even create continuous shapes.
A collaborative effort demonstrates that the physical properties of SrTiO3 can be changed by a simple electrical treatment, creating the effect known as piezoelectricity. This discovery opens a new chapter for research into new materials and unusual properties.
A University of Missouri research team has developed enhanced piezoelectric sensors that can amplify signals, cut costs, and improve reading accuracy. The new technology has wide applications in aviation, detecting structural damage in buildings and bridges, and boosting the capabilities of health monitors.
Researchers at Oak Ridge National Laboratory have discovered the key to piezoelectric excellence in relaxor-based ferroelectrics, enabling more detailed electrical signals and better images in medical ultrasound. The findings may provide knowledge needed to accelerate the design of functional materials for diverse applications.
A team of researchers at Jadavpur University in India has devised a way to recycle fish byproducts into an energy harvester that can generate electricity from mechanical stress. The energy harvester, made from fish scales, is capable of scavenging various types of ambient energies and powering small devices.
Researchers create compact high sensitivity sensors using diamond microstructures, achieving record high microwave frequencies and quality factor. They proposed a mathematical model to select useful acoustic signals and decrease spurious peaks, paving the way for applications in various fields.
High-frequency piezoelectric resonators can now be used in phase locked loops (PLL) with low noise and excellent Figure of Merit (FoM), resolving issues with resonance frequency variance and temperature dependability. This technology enables compact, low-cost, high-speed radio communication systems for the IoT age.
Researchers at Pohang University of Science & Technology have observed high coercive field and activation energy in ferroelectric polarization switching of orthorhombic GaFeO3 on cubic and hexagonal substrates. This finding explains the discrepancy between measured and predicted remanent polarization values.
The UTSA-led team will design and develop piezoelectric sensors to generate electricity from moving vehicles, powering roadside lights, traffic signals, and electric car charging stations. This technology has been field-tested in US and international studies, offering a clean alternative to fossil fuel-generated power.
Researchers have successfully integrated flexoelectric materials into silicon technology, paving the way for more energy-efficient and sustainable electronics. The development could provide an alternative to traditional piezoelectric materials, which pose toxicity concerns.
Researchers have developed a novel plastic that can produce electricity when pulled or pressed, opening up new possibilities for green energy harvesting. The material, called PVDF, has been enhanced with carbon nanostructures to increase its piezoelectric performance, allowing it to contract and relax in response to an electric current.
Researchers at KAIST have developed zinc oxide-based micro energy harvesting devices that can harness mechanical energy to generate electricity. The devices, known as nanogenerators, were found to be more efficient when insulating layers such as aluminum nitride were inserted into the zinc oxide material.
Researchers at Berkeley Lab have observed piezoelectricity in a free-standing single layer of molybdenum disulfide, a potential successor to silicon. The discovery has the potential to lead to tunable piezo-materials and devices for extremely small force generation and sensing.
Researchers found that vibratory stimulation applied to the soles of the feet using piezoelectric technology significantly improves balance by reducing postural sway and gait variability. The study participants showed a persistent improvement in performance on timed tests, indicating potential benefits for fall prevention.
Scientists have created the world's thinnest electric generator by harnessing the piezoelectric properties of a single atomic layer of MoS2. The device is optically transparent, extremely light, and bendable, making it ideal for wearable applications.
Researchers have created a smart material-based chin strap that generates electricity from chewing, eating and talking, with potential to power hearing aids, cochlear implants and other small electronic devices. The device harnesses piezoelectric fiber composites to convert mechanical stress into electric charge.
Researchers at the University of Houston have identified a semiconducting material called graphene nitride as one of the thinnest possible piezoelectric materials. The material is only one atomic layer thick and can be stacked on top of itself without losing its piezoelectric properties.
A research team from KAIST has developed a self-powered artificial cardiac pacemaker that operates semi-permanently using flexible piezoelectric nanogenerators. This technology prolongs the lifetime of pacemaker batteries, reducing the need for frequent replacements and minimizing surgical risks.
KAIST researchers have developed a new technique to increase the energy efficiency of piezoelectric nanogenerators, enabling the creation of self-powered flexible energy harvesters that can supply power to wearable and implantable electronic devices. The improved nanogenerators can harness energy from human movements and natural resour...
Researchers will develop piezoelectric materials and nanometer-scale electromechanical devices to transfer information between quantum states and light using mechanical motion as an intermediary. The goal is to establish a technology that connects individual quantum states and enables the creation of quantum networks.
Piezotronics harnesses mechanically-induced polarization to modulate charge carriers, leading to novel device applications and unparalleled performance. This technology has given rise to strain-gated piezotronic transistors, logic nanodevices and strain memory devices, enhancing sensing capabilities and enabling 3D structuring.
Researchers have developed a nanogenerator that can harness and convert vibration energy from surfaces like car seats into power for smartphones. The device uses piezoelectric materials to generate electricity from mechanical forces, enabling self-charged personal electronics.
Researchers at the University of Leeds have developed high-temperature piezoelectric materials, allowing for electronic monitoring in extreme environments. The new materials, compatible with existing manufacturing methods, have vast potential applications in industries such as aerospace, oil and gas, and nuclear power.
Researchers at NIST and Simon Fraser University have discovered the origin of distinct differences in relaxor behavior compared to ferroelectric PZT. The study found that random electric fields vary randomly from unit cell to unit cell in relaxors, leading to a greater piezoelectric effect.
Researchers develop a new method of wirelessly recharging medical device batteries with ultrasound, offering a safe and efficient means of wireless power transmission. The technology has been tested in animal tissue and demonstrated promising results.
A KAIST research team has developed a flexible piezoelectric energy harvesting device called nanogenerator using biotemplated design. The device converts mechanical energy into electrical energy and can be driven by simple finger movements.
Researchers have developed a new smart-foam technology that can measure helmet impact and detect concussions in real-time. The piezoelectric foam is embedded in football helmets and generates electrical signals when compressed, providing coaches and trainers with instant data on player safety.
Researchers at Georgia Institute of Technology developed a muscle-like actuator that can control camera systems, allowing robots to move more like humans. The technology has potential applications in MRI-guided surgery and robotic rehabilitation.
Scientists have developed a way to generate power using harmless viruses that convert mechanical energy into electricity. The generator produces enough current to operate a small liquid-crystal display, and the milestone could lead to tiny devices harnessing energy from everyday tasks.
Researchers developed a simple, low-cost, and large-scale self-powered energy system using piezoelectric ceramic nanoparticles. The new technology overcomes previous limitations and expands the feasibility of nanogenerators in consumer electronics and wearable clothes.
Researchers have successfully developed a new type of environment-friendly piezoelectric material with giant piezoresponse, using small-ion-doped ZnO. The new material shows promising potential for replacing lead-based piezoelectric materials, which are highly toxic and can contaminate environments.
Researchers at Stanford University have engineered piezoelectricity into a nanoscale material, known as graphene. By modifying the graphene lattice, they were able to achieve fine physical control and created piezoelectric levels comparable to traditional materials. This breakthrough brings new dimension to straintronics and has promis...
Researchers at the National Physical Laboratory have developed a new model for piezoelectric energy harvesters that can convert up to 25% more energy from unwanted mechanical vibrations. The new design covers only two-thirds of the cantilever's length, reducing internal power loss and increasing overall efficiency.
The Duke team has created a nonlinear approach to energy harvesting that can capture more frequencies from ambient vibrations, making it ideal for practical uses in the real world. This could lead to the development of devices that power implants, sensors, and even larger electrical systems.
Engineers created graphene's pseudo-piezoelectric behavior by punching triangle-shaped holes into it, producing strong piezoelectricity comparable to well-known substances like quartz. The results have the potential to open new avenues for graphene and applications relying on piezoelectricity.
Researchers at Northwestern University have discovered that individual gallium nitride nanowires exhibit strong piezoelectricity in three dimensions, with efficiency up to six times greater than bulk material. This finding has significant implications for the development of nanogenerators capable of powering self-powered devices.
Researchers have integrated a highly efficient piezoelectric material into a silicon microelectromechanical system, enabling significant advances in sensing, imaging, and energy harvesting. The new material, PMN-PT, delivers two to four times more movement with stronger force than rival materials, while using only 3 volts.
Researchers have created an alloy that exhibits a strong magnetoresistive effect, enabling sensitive magnetic field detection and tiny actuators. The alloy's unique structure and processing techniques make it a promising next-generation material for microelectromechanical machines.
Researchers at University of Wisconsin-Madison have successfully integrated single-crystal piezoelectric material onto silicon, enabling low-voltage near-nanoscale electromechanical devices. These devices could improve high-resolution 3D imaging, signal processing and energy harvesting applications.