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Latest Piezoelectricity Stories

2012-01-05 16:30:36

Graphene, the ultra-durable carbon material that holds promise for a range of applications, has yet another trick up its single-atom-thick sleeve. Engineers at the University of Houston have used quantum mechanical calculations to show that, merely by creating holes of a certain configuration in a sheet of graphene, they can coax graphene into behaving like a piezoelectric material. Piezoelectric substances generate electricity in response to physical pressure, and vice versa, and scientists...

Image 1 - Insect Cyborgs As First Responders
2011-11-24 04:12:03

Research conducted at the University of Michigan College of Engineering may lead to the use of insects to monitor hazardous situations before sending in humans. Professor Khalil Najafi, the chair of electrical and computer engineering, and doctoral student Erkan Aktakka are finding ways to harvest energy from insects, and take the utility of the miniature cyborgs to the next level. "Through energy scavenging, we could potentially power cameras, microphones and other sensors and...

2011-11-18 03:29:48

Integrating a complex, single-crystal material with "giant" piezoelectric properties onto silicon, University of Wisconsin-Madison engineers and physicists can fabricate low-voltage, near-nanoscale electromechanical devices that could lead to improvements in high-resolution 3-D imaging, signal processing, communications, energy harvesting, sensing, and actuators for nanopositioning devices, among others. Led by Chang-Beom Eom, a UW-Madison professor of materials science and engineering and...

Image 1 - Zinc Oxide Microwires Improve Performance Of Light-emitting Diodes
2011-11-01 03:46:47

Piezo-phototronic effect Researchers have used zinc oxide microwires to significantly improve the efficiency at which gallium nitride light-emitting diodes (LED) convert electricity to ultraviolet light. The devices are believed to be the first LEDs whose performance has been enhanced by the creation of an electrical charge in a piezoelectric material using the piezo-phototronic effect. By applying mechanical strain to the microwires, researchers at the Georgia Institute of Technology...

'Magic Carpet' Modeled After Manta Ray
2011-09-30 11:18:41

A team at Princeton University has developed a four-inch transparent magic carpet. The team, lead by graduate student Noah Jafferis, created a flying carpet based on the manta ray that utilizes piezoelectric actuators and sensors.  The electric current flexes the sheet into waves that drive tiny pockets of air across the sheet. The prototype moves at about 120 feet per hour and only travels a few inches high above the ground. Jafferis said he is working on a solar powered...

2011-09-27 18:05:00

This 2011 survey conducted by Canon Communications and sponsored by Tekscan, Inc. sheds light on the challenges and priorities of product designers in the medical device market, particularly as they relate to sourcing and integrating components like force sensors. Engineers ranked a list of six sensor attributes in order of importance. Accuracy topped the list. Boston, MA (PRWEB) September 27, 2011 Tactile force sensor manufacturer Tekscan, Inc. recently teamed up with Canon Communications...

2011-09-23 11:44:24

Crystals and ceramics pale when compared to a material researchers at Oak Ridge National Laboratory discovered that has 10 times their piezoelectric effect, making it suitable for perhaps hundreds of everyday uses. ORNL's Volker Urban and colleagues at Technical University Aachen in Germany noticed the reverse piezoelectric effect - defined as creating a mechanical strain by applying an electrical voltage -- while conducting fundamental research on polymers. At first they didn't think...

2011-08-15 22:02:24

By combining two frontier technologies, spintronics and straintronics, a team of researchers from Virginia Commonwealth University has devised perhaps the world's most miserly integrated circuit. Their proposed design runs on so little energy that batteries are not even necessary; it could run merely by tapping the ambient energy from the environment. Rather than the traditional charge-based electronic switches that encode the basic 0s and 1s of computer lingo, spintronics harnesses the...

2011-08-04 09:00:00

PORTSMOUTH, N.H., Aug. 4, 2011 /PRNewswire/ -- Novocure, a commercial stage private oncology company, announced today that it has entered into a long-term supply agreement with ITT Electronic Systems, a subsidiary of global engineering and manufacturing conglomerate ITT Corporation (NYSE: ITT). ITT Electronic Systems supplies Novocure with the piezoelectric ceramic components used to manufacture the disposable electrodes for the NovoTTF-100A System, an FDA approved device indicated for the...

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2011-07-27 08:44:09

Biological interface Taking advantage of the unique properties of zinc oxide nanowires, researchers have demonstrated a new type of piezoelectric resistive switching device in which the write-read access of memory cells is controlled by electromechanical modulation. Operating on flexible substrates, arrays of these devices could provide a new way to interface the mechanical actions of the biological world to conventional electronic circuitry. The piezoelectrically modulated resistive memory...