Sentences with phrase «in piezoelectric materials»

In piezoelectric materials, mechanical stress causes crystals to electrically polarize, and vice versa.

If the black brane has an electric charge, bending it converts mechanical stress into an electric field, as in piezoelectric materials (Physical Review Letters, doi.org/j2c).

Not exact matches

Essentially, Sharma and Zelisko proved through this latest research that any semiconducting material can be made piezoelectric by cutting triangle holes pointing in the same direction on the material.

These materials are also used in everyday devices, such as loudspeakers, which rely on piezoelectrics to convert electrical signals to mechanical vibrations which create sound waves to produce the desired acoustic signal.

Another group of collaborators, led by Professor Jiangyu Li at the University of Washington in Seattle, tested the material using a state of the art apparatus and proved it was, indeed, piezoelectric.

Now, the M.D. Anderson Chair Professor and mechanical engineering department chairman at the University of Houston Cullen College of Engineering, Pradeep Sharma, and his doctoral student, Matthew Zelisko, in collaboration with scientists at Rice University and University of Washington, have identified one of the thinnest possible piezoelectric materials on the planet — graphene nitride.

The team used the strain induced by an electric field applied to a piezoelectric material (which deforms mechanically in response to an electric field) to manipulate the chirality of the domain wall.

To make efficient vibration harvesters from PVDF, researchers must stack the polymer in multiple layers, improving the output current and reducing the electrical impedance that is inherent to piezoelectric materials.

In particular, piezoelectrics — materials that can convert mechanical stress into an electric field and vice versa — have proved challenging to replace.

The team still needs to improve the material's piezoelectric response, says Muhtar Arhart, a materials researcher at the Carnegie / Doe Alliance Center in Washington DC, not involved with the research.

This is often done with piezoelectric materials, which are able to change shape in the presence of an electric voltage.

According to the authors on the paper «Flexible Ionic Devices for Low - Frequency Mechanical Energy Harvesting» published online in the journal Advanced Energy Materials, «The peak power density of our device is in general larger than or comparable to those of piezoelectric generators operated at their most efficient frequencies.»

Wang, his Ph.D. student Yanchao Mao and collaborators from Sun Yat - sen University in China, and the University of Minnesota Duluth described their device, a mesoporous piezoelectric nanogenerator, in the January 27, 2014, issue of the journal Advanced Energy Materials.

In 2010, physicists put the largest system yet into a superposition: a 40 - micrometre - long strip of piezoelectric material, which expands and contracts in response to voltage changeIn 2010, physicists put the largest system yet into a superposition: a 40 - micrometre - long strip of piezoelectric material, which expands and contracts in response to voltage changein response to voltage changes.

«We can directly create piezoelectric materials of the shape we want, where we want them, on flexible substrates for use in energy harvesting and other applications,» said Nazanin Bassiri - Gharb, co-author of the paper and an assistant professor in the School of Mechanical Engineering at the Georgia Institute of Technology.

We have seen piezoelectric transistors incorporated into synthetic skins making them sensitive enough to read fingerprints, other approaches that use multipurpose sensors to detect temperature and humidity in addition to pressure, and others that use pressure - sensitive materials made from inorganic semiconductors to only use a small amounts of power.

In certain materials, piezoelectrics, which expand or contract when applying a voltage, SAWs can be generated through oscillating electric fields.

This new energy harvesting device uses an electrochemical process similar to that in lithium ion batteries to produce electricity instead of a physical process like the other piezoelectric materials, which will likely make it inexpensive to manufacture.

«When you put in an impulse» to traditional piezoelectric materials, «they respond very well, in microseconds.

Although piezoelectric materials, which convert kinetic stress to power, can be found in movement - powered watches, highways, and dance floors, most of them are too rigid to be useful in garments.

Scientists at the University of Bolton in the U.K. are developing a textile fiber, called hybrid photovoltaic - piezoelectric material, that absorbs energy from its wearer's body movements and the surrounding elements, including the wind, rain, and sun — Captain Planet would be proud!

Specifically, Cagin and his partners from the University of Houston have found that a certain type of piezoelectric material can covert energy at a 100 percent increase when manufactured at a very small size — in this case, around 21 nanometers in thickness.

Scientists at the University of Bolton in the U.K. are developing a textile fiber, called hybrid photovoltaic - piezoelectric material, that absorbs energy from its wearer's body movements and the

For it to operate underwater, the team used piezoelectric materials in its construction so that it will be powered by the bobbing of the waves.

To her, the branches looked like piezoelectric materials, devices that produce electricity from vibrations and she began to imagine a renewable energy technology that could harness the energy in the wind and rain.