Navigation Links
Snap to attention: Polymers that react and move to light
Date:11/8/2013

PITTSBURGHMicrovehicles and other devices that can change shape or move with no power source other than a beam of light may be possible through research led by the University of Pittsburgh. The researchers are investigating polymers that "snap" when triggered by light, thereby converting light energy into mechanical work and potentially eliminating the need for traditional machine components such as switches and power sources.

"I like to compare this action to that of a Venus flytrap," says M. Ravi Shankar, lead author of the study and associate professor of industrial engineering in the University's Swanson School of Engineering. "The underlying mechanism that allows the Venus flytrap to capture prey is slow. But because its internal structure is coupled to use elastic instability, a snapping action occurs, and this delivers the power to shut the trap quickly. A similar mechanism acts in the beak of the Hummingbird to help snap-up insects"

The research was performed by Shankar in collaboration with Timothy J. White of the Air Force Research Laboratory at Wright-Patterson Air Force Base and Matthew Smith, assistant professor of engineering at Hope College in Holland, Mich.

Focusing on this elastic instability, Shankar examined polymeric materials, prepared by researchers at the Air Force Research Laboratory, which demonstrated unprecedented actuation rates and output powers. With light from a hand-held laser pointer, the polymers generate high amounts of power to convert the light into mechanical work without any onboard power source or wiring. Specific functions would be pre-programmed into the material so that the device would function once exposed to a light source and controlled by changing the character of the light.

"As we look to real-world applications, you could activate a switch simply by shining light on it," Shankar says. "For example, you could develop soft machines such as stents or other biomedical devices that can be more adaptive and easily controlled. In a more complex mechanism, we could imagine a light-driven robotic or morphing structure, or microvehicles that would be more compact because you eliminate the need for an on-board power system. The work potential is built into the polymer itself and is triggered with light."

The study, titled "Contactless, photoinitiated snap-through in azobenzene-functionalized polymers," was published Oct. 30, 2013, in the early edition of the Proceedings of the National Academy of Sciences.


'/>"/>

Contact: John Fedele
jfedele@pitt.edu
412-624-4148
University of Pittsburgh
Source:Eurekalert

Related biology news :

1. Pay attention: How we focus and concentrate
2. Heterogeneous nanoblocks give polymers an edge
3. Accidental discovery may lead to improved polymers
4. Fraunhofer shows bio-tiles and heat-resistant biopolymers
5. UCLA researchers develop way to strengthen proteins with polymers
6. Gut reaction
7. Consumers have few negative reactions to the results of genetic testing for cancer mutations
8. Study: Viral reactivation a likely link between stress and heart disease
9. Rice uses light to remotely trigger biochemical reactions
10. How and why herpes viruses reactivate to cause disease
11. Einstein researcher receives $10.8 million grant to study toxic blood reactions caused by hemoglobin
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/15/2016)... 2016 Research and Markets has ... Market 2016-2020,"  report to their offering.  , ... ,The global gait biometrics market is expected to ... period 2016-2020. Gait analysis generates multiple ... used to compute factors that are not or ...
(Date:3/31/2016)... March 31, 2016   ... or the "Company") LegacyXChange is excited to ... its soon to be launched online site for trading ... ) will also provide potential shareholders a sense ... technology to an industry that is notorious for fraud. ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... , ... Supplyframe, the Industry Network for electronics hardware design ... Located in Pasadena, Calif., the Design Lab’s mission is to bring together inventors ... and brought to market. , The Design Lab is Supplyframe’s physical representation of ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... regulatory and technical consulting, provides a free webinar on Performing Quality ... 13, 2016 at 12pm CT at no charge. , Incomplete investigations are still ...
(Date:6/22/2016)... DIEGO , June 22, 2016 ... that will allow them to produce up to ... from one lot within one week. These high-quality, ... time laboriously preparing cells and spend more time ... possible through a proprietary, high-volume manufacturing process that ...
Breaking Biology Technology: