Piezoelectric Current Events

Piezoelectric Current Events, Piezoelectric News Articles.
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Samarium-doped crystals with 'giant' piezoelectricity
By introducing trace amounts of the element samarium (Sm), researchers greatly enhanced the performance of piezoelectric crystals used in advanced piezoelectric devices like sensors, a new study reports. (2019-04-18)

Graphene's piezoelectric promise
Engineers predict that graphene can be coaxed into acting piezoelectric, merely by punching triangular holes into the material. (2012-01-05)

Designing new piezoelectric materials
Polymer-based piezoelectric materials are currently the object of great interest in the world of industry because they enable their use in new applications in sectors such as transport and aeronautics, amongst others. (2007-10-24)

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)

Could "Power Walking" fuel the energy revolution? India is ready to step up
India has an energy problem. It currently relies heavily on coal and consumer demand is expected to double by 2040, making its green energy targets look out of reach. Part of the solution could come from harvesting energy from footsteps, say Hari Anand and Binod Kumar Singh from the University of Petroleum and Energy Studies in Dehradun, India. Their new study, published in the De Gruyter journal Energy Harvesting and Systems, shows that Indian attitudes towards power generated through piezoelectric tiles are overwhelmingly positive. (2021-01-19)

UK scientists develop optimum piezoelectric energy harvesters
Scientists working as part of the Metrology for Energy Harvesting Project have developed a new model to deliver the maximum power output for piezoelectric energy harvesters. (2012-03-02)

UH researchers identify one of world's thinnest piezoelectric materials
In collaboration with scientists at Rice University and University of Washington, University of Houston mechanical engineering chair Pradeep Sharma and his doctoral student Matthew Zelisko have identified one of the thinnest possible piezoelectric materials on the planet -- graphene nitride. (2014-07-01)

Smaller, lighter power adaptors take the weight off laptops
As notebook computers become thinner and lighter, the ever-present bulky power adapters used for line current approach the weight of the laptops, but smaller and lighter adapters may be on the way, thanks to piezoelectric technology, according to a Penn State electrical engineer. (2003-12-16)

Flexible piezoelectric acoustic sensors for speaker recognition
A KAIST research team has developed a machine learning-based acoustic sensor for speaker recognition. The team fabricated a flexible piezoelectric membrane by mimicking the basilar membrane in the human cochlear. Resonant frequencies vibrate corresponding regions of the trapezoidal piezoelectric membrane, which converts voice to electrical signal with a highly sensitive self-powered acoustic sensor. (2018-10-04)

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)

Power generation technology based on piezoelectric nanocomposite materials developed by KAIST
Professor Keon- Jae Lee's research team, KAIST, has developed a nanocomposite-based nanogenerator that successfully overcomes the critical restrictions existed in previous nanogenerators and builds a simple, low-cost, and large-scale self-powered energy system. The team produced a piezoelectric nanocomposite by mixing piezoelectric nanoparticles with carbon-based nanomaterials in a polydimethylsiloxane matrix and fabricated the nanocomposite generator by the simple process of spin-casting or bar-coating method. (2012-05-07)

Residual stress in piezoelectric ceramics can be reduced, put to work
By applying a mechanical bending stress to offset the effects of residual stress in a piezoelectric ceramic thin film, researchers at the University of Illinois have found a way to significantly enhance the film's performance. (2000-08-31)

Mini motor could change the shape of micromedical applications
While the age of nanobots is not with us yet, a tiny, inexpensive motor with simple circuitry and easy manufacture, may become the motive force in micromedical applications in the near future, according to a Penn State engineer. The smallest of these ultrasonic, piezoelectric motors developed by researchers at Penn State's Materials Research Institute is about the size of a grain of rice. (2001-11-07)

PLUS takes 3D ultrasound images of solids
A two-in-one technology provides 3D images of structural defects, such as those that can develop in aircraft and power plants. (2020-09-25)

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)

'Smart' material grows dumber with shrinking size, scientist says
As active materials become increasingly smaller for the next generation of smart materials systems, the need to understand and predict material response becomes critical. At the University of Illinois, an experimental investigation into how the properties and responses of smart materials -- such as piezoelectric ceramics -- change as a function of size has yielded a few surprises. (2000-05-31)

Highly deformable piezoelectric nanotruss for tactile electronics
A KAIST research team confirmed the potential of tactile devices by developing ceramic piezoelectric materials that are three times more deformable. For the fabrication of highly deformable nanomaterials, the research team built a zinc oxide hollow nanostructure using proximity field nanopatterning and atomic layered deposition. (2021-02-01)

KAIST developed the biotemplated design of piezoelectric energy harvesting device
A research team led by Professor Keon Jae Lee and Professor Yoon Sung Nam from the Department of Materials Science and Engineering at KAIST has developed the biotemplated design of flexible piezoelectric energy harvesting device, called (2013-12-03)

Swirl power: how gentle body movement will charge your mobile phone
Scientists have discovered a way to generate electricity from nylon - the stretchy fabric used widely in sportswear and other shape-hugging apparel - raising hopes that the clothes on our backs will become an important source of energy. (2020-11-06)

Circular ceramic devices make more efficient transformers
Thinner laptop computers and flat-screen TVs may be possible with a simple change in the geometry of piezoelectric transformers that can increase the conversion ratio without adding volume or weight, according to Penn State researchers. (1999-11-30)

Scientists show how order and disorder unite to enable ultrasound, sonar
Chemists at the University of Pennsylvania have shown how atom-scale changes in certain materials can dramatically affect their ability to interchange mechanical and electrical signals. This finding, reported in the Oct. 31 issue of Nature, may permit scientists to engineer these materials to be more sensitive, durable and environmentally friendly. (2002-10-31)

Straintronics: Engineers create piezoelectric graphene
By depositing atoms on one side of a grid of the (2012-03-15)

New type of ultrahigh piezoelectricity in hydrogen-bonded ferroelectrics
A new strategy is proposed to generate ultra-high piezoelectric coefficients, and many hydrogen-bonded ferroelectrics (e.g., organic PhMDA) can be ideal candidates owing to the specific features of hydrogen bonding. Their Curie temperature can be approximately doubled upon a tensile strain as low as 2 %, which can be tuned exactly to room-temperature by fixing a strain in one direction, and in another direction, an unprecedented ultra-high piezoelectric coefficient can be obtained. (2020-11-20)

An electrifying discovery: New material to harvest electricity from body movements
Scientists are reporting an advance toward scavenging energy from walking, breathing, and other natural body movements to power electronic devices like cell phones and heart pacemakers. In a study in ACS' monthly journal, Nano Letters, they describe development of flexible, biocompatible rubber films for use in implantable or wearable energy harvesting systems. (2010-02-24)

Researchers demonstrate fundamentally new approach to ultrasound imaging
Researchers have demonstrated a new technique for creating ultrasound images. The new approach is substantially simpler than existing techniques and could significantly drive down technology costs. (2020-08-13)

Nanowires exhibit giant piezoelectricity
In a paper published online in the journal Nano Letters, researchers at the McCormick School of Engineering and Applied Science at Northwestern University reported that piezoelectricity in GaN and ZnO nanowires is enhanced by as much as two orders of magnitude as the diameter of the nanowires decrease. (2011-01-25)

Single Crystals Move More With High Voltage
High voltage causes a family of crystals known as relaxor ferroelectrics to deform 10 times more than any other material currently known, according to a Penn State materials scientist. (1997-05-13)

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity
Researchers at Osaka University developed a new method that uses piezoelectric resonance to improve the manufacture of highly sensitive hydrogen sensors. By optimizing the gaps between palladium nanoparticles in the devices, they were able to increase the sensitivity by a factor of 12 over palladium nanoparticles fabricated by previous methods. The work in this study is important for the development of new sensing devices that are capable of detecting hydrogen at low concentration. (2019-05-22)

Nanowire generates power by harvesting energy from the environment
As the sizes of sensor networks and mobile devices shrink toward the microscale, and even nanoscale, there is a growing need for suitable power sources. Because even the tiniest battery is too big to be used in nanoscale devices, scientists are exploring nanosize systems that can salvage energy from the environment. Researchers at the University of Illinois have now shown that a single nanowire can produce power by harvesting mechanical energy. (2007-09-27)

Transparency discovered in crystals with ultrahigh piezoelectricity
Use of an AC rather than a DC electric field can improve the piezoelectric response of a crystal. Now, an international team of researchers say that cycles of AC fields also make the internal crystal domains in some materials bigger and the crystal transparent. (2020-01-15)

Lead-free piezoelectric materials of the future
Over the past 60 years, lead zirconate titanate, or PZT, has been the material of choice for piezoelectric applications from ink jet printers to gas grill igniters. Despite this success, many scientists would like to find a more environmentally friendly, lead-free material. Now an article in the journal Applied Physics Letters shows the theoretical potential of another class of materials. (2010-09-14)

ORNL discovers amazing electrical properties in polymers
Crystals and ceramics pale when compared to a material researchers discovered that has 10 times their piezoelectric effect, making it suitable for perhaps hundreds of everyday uses. (2011-09-22)

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)

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)

Electric textile lights a lamp when stretched
Working up a sweat from carrying a heavy load? That is when the textile works at its best. Swedish researchers have developed a fabric that converts kinetic energy into electric power. The greater the load applied to the textile and the wetter it becomes the more electricity it generates. The results are now published in the Nature Partner journal Flexible Electronics. (2018-03-22)

Buzzing to rebuild broken bone
Healing broken bones could get easier with a device that provides both a scaffold for the bone to grow on and electrical stimulation to urge it forward, UConn engineers report. Although minor bone breaks usually heal on their own, large fractures with shattered or missing chunks of bone are more difficult to repair. A biocompatible, dissolving polymer device can mimic the body's natural electrical field and help the cells regenerate. (2020-06-30)

Microfabrication breakthrough could set piezoelectric material applications in motion
Integrating a complex, single-crystal material with (2011-11-17)

Today's highest quality composite-piezoelectric developed at NUST MISIS
NUST MISIS scientists jointly with an international group of scientists have managed to develop a composite material that has the best piezoelectric properties today. The research results were published in Scientific Reports journal. (2018-02-12)

Vibration energy the secret to self-powered electronics
A multi-university team of engineers has developed what could be a promising solution for charging smartphone batteries on the go -- without the need for an electrical cord. (2014-02-20)

The first demonstration of a self-powered cardiac pacemaker
A research team from the Korea Advanced Institute of Science and Technology, headed by Professor Keon Jae Lee of the Department of Materials Science and Engineering at KAIST and Professor Boyoung Joung, M.D. of the Division of Cardiology at Severance Hospital of Yonsei University, has developed a self-powered artificial cardiac pacemaker that is operated semi-permanently by a flexible piezoelectric nanogenerator. (2014-06-23)

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