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Current Piezoelectric News and Events, Piezoelectric News Articles.
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A nanophenomenon that triggers the bone-repair process
Researchers at the Institut Català de Nanociència i Nanotecnologia have resolved one of the great unknowns in bone self-repair: how the cells responsible for forming new bone tissue are called into action. Their work reveals the role of an electromechanical phenomenon at the nanoscale, flexoelectricity, as a possible mechanism for stimulating the cell response and guiding it throughout the fracture repair process. (2018-01-19)

Biodegradable sensor could help doctors monitor serious health conditions
University of Connecticut engineers have created a biodegradable pressure sensor that could help doctors monitor chronic lung disease, swelling of the brain, and other medical conditions before dissolving harmlessly in a patient's body. (2018-01-16)

Acoustic device makes piezoelectrics sing to a different tune
In today's 'internet of things,' devices connect primarily over short ranges at high speeds, an environment in which surface acoustic wave devices have shown promise for years. To obtain faster speeds, however, SAW devices need to operate at higher frequencies, limiting output power and overall performance. Researchers have demonstrated a new device that can achieve frequencies six times higher than most current devices. Their results are published this week in Applied Physics Letters. (2017-12-19)

Researchers generate electricity from low-cost biomaterial
Mobile phone speakers and motion detectors in cars and video games may soon be powered by electricity generated from low cost and sustainable biomaterials, according to research carried out at University of Limerick (UL), Ireland. (2017-12-04)

The piezoelectric effect of lysozyme was experimentally proved
A group of researchers from the University of Limerick and Ural Federal University received direct evidence of the piezoelectric effect of lysozyme in monoclinic and tetragonal aggregate films of lysozyme. The sufficiently high piezoelectric coefficient is several times higher than that of the classical quartz piezoelectricity, which makes it possible to use this material for various biomedical purposes, for example, to generate electric charges in cells. (2017-11-23)

Piezoelectrics stretch their potential with a method for flexible sticking
Thin-film piezoelectrics, with dimensions on the scale of micrometers or smaller, offer potential for new applications where smaller dimensions or a lower voltage operation are required. Researchers have demonstrated a new technique for making piezoelectric microelectromechanical systems by connecting a sample of lead zirconate titanate piezoelectric thin films to flexible polymer substrates. They report their results in this week's Journal of Applied Physics. (2017-10-25)

Strange but true: Turning a material upside down can sometimes make it softer
Through the combined effect of flexoelectricity and piezoelectricity, researchers at the ICN2 led by ICREA Gustau Catalán in collaboration with the UAB have found that polar materials can be made more or less resistant to dents when they are turned upside down... or when a voltage is applied to switch their polarization. This research points to the future development of 'smart mechanical materials' for use in smart coatings and ferroelectric memories. (2017-10-19)

The Fitbits of food ingestion?
A multi-disciplinary team co-led by researchers from Brigham and Women's Hospital and MIT has developed flexible sensors with the capacity to sense movement and ingestion in the stomach. (2017-10-10)

Flexible sensors can detect movement in GI tract
MIT researchers have devised a flexible ingestible sensor that could help doctors to diagnose problems caused by a slowdown of food flowing through the digestive tract. The sensors could also be used to detect food pressing on the stomach, helping doctors to monitor food intake by patients being treated for obesity. (2017-10-10)

Researchers get straight to the heart of piezoelectric tissues
While some studies have supported the idea that the walls of the aorta are piezoelectric or ferroelectric, the most recent research finds no evidence of these properties. Researchers investigated by testing samples of pig aorta using a traditional setup, known as Sawyer-Tower, to detect ferroelectricity. Their experiments suggest the aorta has no special properties, and instead acts as a standard dielectric material that does not conduct current. They report their work in Applied Physics Letters. (2017-10-05)

Irish scientists can now produce electricity from tears
A team of Irish scientists has discovered that applying pressure to a protein found in egg whites and tears can generate electricity. The researchers from the Bernal Institute, University of Limerick (UL), Ireland, observed that crystals of lysozyme, a model protein that is abundant in egg whites of birds as well as in the tears, saliva and milk of mammals can generate electricity when pressed. Their report is published today (October 2) in the journal, Applied Physics Letters. (2017-10-02)

Small scale energy harvesters show large scale impact
The production of nano-scale devices has drastically increased with the rise in technological applications, yet a major drawback to the functionality of nano-sized systems is the need for an equally small energy resource. To address this, researchers in Iran have been modeling new piezoelectric energy harvester technology at the nano-scale level. In their article, published this week in AIP Advances, the team discuss how small-scale dimensions impact nonlinear vibrations and PEH voltage harvesting. (2017-09-28)

NIST's quick test may speed antibiotic treatment and combat drug resistance
Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a potential new tactic for rapidly determining whether an antibiotic combats a given infection, thus hastening effective medical treatment and limiting the development of drug-resistant bacteria. Their method can quickly sense mechanical fluctuations of bacterial cells and any changes induced by an antibiotic. (2017-09-22)

Developing roads that can generate power from passing traffic
Researchers are looking at advanced materials for roads and pavements that could generate electricity from passing traffic. Engineers from Lancaster University are working on smart materials such as 'piezolectric' ceramics that when embedded in road surfaces would be able to harvest and convert vehicle vibration into electrical energy. (2017-09-18)

High-speed switching for ultrafast electromechanical switches and sensors
Scientists at Tokyo Institute of Technology, Nagoya University, Japan Synchrotron Radiation Research Institute (JASRI), National Institute for Materials Science (NIMS) and University of New South Wales have observed high-speed switching in Pb(Zr0.4Ti0.6)O3 thin films under applied rectangular electric field pulses. (2017-08-29)

Tweaking thermoelectric voltage across atomic-scale gold junction by mechanical force
Scientists at Tokyo Institute of Technology achieved precise and fully reversible switching of the polarity of voltage produced by the thermoelectric effect across a gold junction with an atomic-scale contact. The control of thermoelectric voltage was achieved by mechanically elongating the contact. This technology is expected to find applications in thermopower generation, measurement techniques in materials science, and solid-state electronic devices. (2017-08-25)

Researchers create magnetic RAM
A team of researchers has now developed a magnetoelectric random access memory (MELRAM) cell, which consists of two components: piezoelectric material and a layered structure characterized by a high magnetoelasticity. When a voltage is applied to the memory cell, the piezoelectric layer of the structure is deformed. Depending on the nature of the strain, magnetization assumes a particular orientation, storing information. The changing orientation of the magnetic field gives rise to increased voltage in the sample. (2017-08-22)

New photoacoustic technique detects gases at parts-per-quadrillion level
The technique enables the detection of gases, such as atmospheric pollutants, present in extremely small quantities that are otherwise difficult or impossible to detect. (2017-06-27)

Smart materials used in ultrasound behave similar to water, Penn chemists report
Researchers at the University of Pennsylvania provided new insight into piezoelectrics materials, a smart material used in ultrasound technology. While forming the most thorough model to date of how these materials work, they found striking similarities with the behavior of water. A more complete understanding of why these materials behave the way they do can unlock new materials design, leading to higher quality piezoelectrics that may revolutionize smart material applications. (2017-06-15)

Magnetoelectric memory cell increases energy efficiency for data storage
A team of researchers has now developed a magnetoelectric random access memory (MELRAM) cell that has the potential to increase power efficiency, and thereby decrease heat waste, by orders of magnitude for read operations at room temperature. The research could aid production of devices such as instant-on laptops, close-to-zero-consumption flash drives, and data storage centers that require much less air conditioning. The research team reported their findings this week in Applied Physics Letters. (2017-05-30)

Hybrid heterostructures with programmable potentials
In a novel controllable chemical method, Flagship researchers have created hybrid nanomaterials that can be tailored to have programmable electronic and optical properties -- ideal for designing new types of electronics with new functionalities. (2017-04-28)

Optical generation of ultrasound via photoacoustic effect
Limitations of the piezoelectric array technologies conventionally used for ultrasonics inspired researchers to explore an alternative mechanism for generating ultrasound via light (the photoacoustic effect). Coupling this with 3-D printing, the group was able to generate sounds fields with specific shapes for potential use in biological cell manipulation and drug delivery. As the group reports in this week's Applied Physics Letters, their work focuses on using the photoacoustic effect to control ultrasound fields in 3-D. (2017-02-28)

Material can turn sunlight, heat and movement into electricity -- all at once
Many forms of energy surround you: sunlight, the heat in your room and even your own movements. All that energy -- normally wasted -- can potentially help power your portable and wearable gadgets, from biometric sensors to smart watches. Now, researchers from the University of Oulu in Finland have found that a mineral with the perovskite crystal structure has the right properties to extract energy from multiple sources at the same time. (2017-02-07)

New approach captures the energy of slow motion
A new concept in energy harvesting could capture energy currently wasted due to its characteristic low frequency and use it to power next-generation electronic devices, according to a team of Penn State materials scientists and electrical engineers. (2016-12-21)

Can you bounce water balloons off a bed of nails? Yes, says new study
A group of first year students at Roskilde University, supervised by Dr. Tina Hecksher, have shown that water-filled balloons behave very similarly to tiny water droplets, by bouncing them on a bed of nails. (2016-12-13)

Creating new physical properties in materials
A collaborative effort between research groups at the Technical University of Freiberg and the University of Siegen in Germany demonstrates that the physical properties of SrTiO3, or strontium titanate, in its single crystal form can be changed by a relatively simple electrical treatment. (2016-11-29)

Aviation enhancements, better biosensors could result from new sensor technology
Piezoelectric sensors measure changes in pressure, acceleration, temperature, strain or force and are used in a vast array of devices important to everyday life. However, these sensors often can be limited by the 'white noise' they detect that can give users false readings. Now, a University of Missouri College of Engineering research team has developed methods to enhance piezoelectric sensing capabilities. Enhanced sensors could be used to improve aviation, detect structural damage in buildings and bridges, and boost the capabilities of health monitors. (2016-11-23)

Micro-bubbles make big impact
The quest to develop wireless micro-robots for biomedical applications requires a small-scale 'motor' that can be wirelessly powered through biological media. While magnetic fields can be used to power small robots wirelessly, they don't provide selectivity since all actuators under the same magnetic field just follow the same motion. To address this limitation of magnetic actuation, researchers have developed a way to use microbubbles to provide the specificity needed to power micro-robots for biomedical applications. (2016-11-22)

Sheffield researchers identify greater environmental risks in 'green' material
Researchers from the University of Sheffield, using life cycle analysis, discover that legislation proposing the replacement of a common material has led to wider use of an even more toxic substance. (2016-10-17)

Study yields new knowledge about materials for ultrasound and other applications
Scientists at the Department of Energy's Oak Ridge National Laboratory and their research partners have used neutron scattering to discover the key to piezoelectric excellence in the newer materials, which are called relaxor-based ferroelectrics. (A ferroelectric material has electrical polarization that is reversed by application of an electric field.) Their findings, published online in the journal Science Advances, may provide knowledge needed to accelerate the design of functional materials for diverse applications. (2016-10-03)

Startup earns commercialization grant for new technology
GuidaBot, a joint venture between the University of Houston and Fannin Innovation Studio, has received a one-year, $225,000 grant from the National Science Foundation to develop and commercialize a robotic manipulator designed to work within the powerful magnetic field of an MRI machine. (2016-10-02)

Fish 'biowaste' converted to piezoelectric energy harvesters
Large quantities of fish are consumed in India on a daily basis, which generates a huge amount of fish 'biowaste' materials. In an attempt to do something positive with this biowaste, a team of researchers at Jadavpur University in Koltata, India explored recycling the fish byproducts into an energy harvester for self-powered electronics. (2016-09-06)

KAIST develops ultrathin, transparent oxide thin-film transistors for wearable display
A research team led by Professors Keon Jae Lee and Sang-Hee Ko Park of the Department of Materials Science and Engineering at KAIST has developed ultrathin and transparent oxide thin-film transistors for an active-matrix backplane of a flexible display by using the inorganic-based laser lift-off method. (2016-07-29)

Diamond-based resonators might become highly sensitive detectors
A comprehensive study of acoustic waves in piezoelectric layered structures has led to a number of interesting discoveries. In particular, the researchers have come up with a possible way to reduce the effect of spurious peaks -- an undesirable phenomenon which occurs while studying a frequency response in such materials. (2016-06-21)

Circuit technology that resolves issues with high-frequency piezoelectric resonators
In collaboration with the National Institute of Information and Communications Technology, Associate Professor Hiroyuki Ito and Professor Kazuya Masu, et al., of the Tokyo Institute of Technology, developed a new algorithm and circuit technology allowing high-frequency piezoelectric resonators to be used for phase locked loops (PLL). It was confirmed that these operate with low noise and have an excellent Figure of Merit compared to conventional PLLs. (2016-06-17)

Why cancer drugs can't take the pressure
A major reason why cancer drugs fail is that they cannot penetrate the high-pressure environment of solid tumors. A study published May 10 in Biophysical Journal reveals that hyaluronic acid is primarily responsible for generating elevated gel-fluid pressures in tumors. In a mouse model of pancreatic cancer, treatment with an enzyme that breaks down hyaluronic acid normalized fluid pressure in tumors and allowed vessels to re-expand, thereby overcoming a major barrier to drug delivery. (2016-05-10)

Engineers create a better way to boil water -- with industrial, electronics applications
Engineers at Oregon State University have found a new way to induce and control boiling bubble formation, that may allow everything from industrial-sized boilers to advanced electronics to work better and last longer. (2016-05-04)

Nanoscrolls created from graphene's imperfect cousin
Seeking an alternative, a team from MIT and Harvard University is looking to graphene oxide -- graphene's much cheaper, imperfect form. Graphene oxide is graphene that is also covered with oxygen and hydrogen groups. The material is essentially what graphene becomes if it's left to sit out in open air. The team fabricated nanoscrolls made from graphene oxide flakes and was able to control the dimensions of each nanoscroll, using both low- and high-frequency ultrasonic techniques. (2016-04-14)

Multilingual circuit: NIST's 'optomechanical transducer' links sound, light, radio waves
Researchers working at the National Institute of Standards and Technology (NIST) have developed a (2016-03-28)

Microagents with revolutionary potential
Micro and nanorobots that attack tumors with maximum precision using drugs: this is what the fight against cancer may look like in the future. A group of ETH researchers led by Salvador Pané are laying the foundations with magnetoelectric-controlled Janus machines. (2016-03-22)

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