Sooner than later, robots may have the ability to "feel." In a paper published online March 26 in Advanced Functional Materials, a team of researchers from the University of Pittsburgh and the Massachusetts Institute of Technology (MIT) demonstrated that a nonoscillating gel can be resuscitated in a fashion similar to a medical cardiopulmonary resuscitation. These findings pave the way for the development of a wide range of new applications that sense mechanical stimuli and respond chemically—a natural phenomenon few materials have been able to mimic.
A team of researchers at Pitt made predictions regarding the behavior of Belousov-Zhabotinsky (BZ) gel, a material that was first fabricated in the late 1990s and shown to pulsate in the absence of any external stimuli. In fact, under certain conditions, the gel sitting in a petri dish resembles a beating heart.
Along with her colleagues, Anna Balazs, Distinguished Professor of Chemical and Petroleum Engineering in Pitt's Swanson School of Engineering, predicted that BZ gel not previously oscillating could be re-excited by mechanical pressure. The prediction was actualized by MIT researchers, who proved that chemical oscillations can be triggered by mechanically compressing the BZ gel beyond a critical stress.
"Think of it like human skin, which can provide signals to the brain that something on the body is deformed or hurt," says Balazs. "This gel has numerous far-reaching applications, such as artificial skin that could be sensory—a holy grail in robotics."
Balazs says the gel could serve as a small-scale pressure sensor for different vehicles or instruments to see whether they'd been bumped, providing diagnostics for the impact on surfaces. This sort of development—and materials like BZ gel—are things Balazs has been interested in since childhood."My mother would often tease me when I was young, saying I was like a mimosa plant— shy and bashful," says Balazs. "As a result, I became fascinated with the plant and its unique hide-and-seek qualities—the plant leaves fold inward and droop when touched or shaken, reopening just minutes later. I knew there had to be a scientific application regarding touch, which led me to studies like this in mechanical and chemical energy."
Also on Balazs's research team were Olga Kuksenok, research associate professor, and Victor Yashin, visiting research assistant professor, both in Pitt's Swanson School of Engineering. At MIT, the work was performed by Krystyn Van Vliet, Paul M. Cook Career Development Associate Professor of Material Sciences and Engineering, and graduate student Irene Chen. (Group Web site: http://vvgroup.scripts.mit.edu/WP/).
University of Pittsburgh: http://www.pitt.edu
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
When an asteroid plows into the Earth, it destroys pretty much everything in its path. But new research has shown that glass created during a searing asteroid impact can actually trap microscopic signs of life for millions of years, providing scientists with a snapshot of the biology in the area just before and after the strike.
It's not often that we think about deep time. Lucky to live for a century, humans flitter like mayflies across Earth's surface, our own epoch an eyeblink in a planetary history that's largely hidden from everyday consciousness. Every now and then, though, that history punches right through into the present.
Ancient grasses from the Pampas of Argentina were preserved when asteroids struck the area, scientists report.
The longest-running experiment in the world has for the first time glimpsed a drop of viscous pitch fall – although the event comes too late for one man
A playfully named subatomic particle is confirmed, and beats rivals Bert and Ernie in terms of energy. Next step: to find a cluster of space neutrinos
Can matter be made of four quarks bound together? The discovery of a new particle has been confirmed at the LHC and may be our best hope of an answer
Traditional spice producers and synthetic biologists don't have to compete – there's room for both
Cortines School's Greg Schiller was removed by L.A. Unified after two students' projects were deemed to resemble weapons. A popular Los Angeles high school science teacher has been suspended after students turned in projects that appeared dangerous to administrators, spurring a campaign calling for his return to the classroom.
Eighty percent of the universe is utterly invisible, but an exotic dance of mutually annihilating particles may explain it all
NASA says the Western Pacific island of Nishino-shima has merged with its newly created volcanic companion, forming one larger landmass.