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.
A team of Indian physicists has made a mathematical model that purports to explain why ants don't have traffic jams. NPR's Joe Palca explains as part of his series, Joe's Big Idea.
On a fall morning in 2009, a team of three young physicists huddled around a computer screen in a small office overlooking Broadway in New York. They were dressed for success—even the graduate student’s shirt had buttons—and a bottle of champagne was at the ready.
Light is the fastest thing around, but shaped beams travel slower than expected, even in a vacuum. No need to throw your physics textbooks out yet though
A new molten salt nuclear reactor design could make nuclear power safer and more economical.A new take on an old reactor design could make nuclear power cleaner and safer, and therefore more competitive with fossil fuels.
Forensic scientists can find crime-solving evidence in the tiniest details, such as the insects that arrive at the scene to feed on the decomposing corpse.
It may surprise you to learn that some processed foods made from GMOs — say, canola oil, for example — don't actually contain any genetically modified DNA or proteins.
Vanilla-flavored rocks hint at a planet scoured by intense acid rain during the Great Dying 252 million years ago
A plan to store the world’s nuclear waste deep inside the ice sheets of Greenland and Antarctica, the two Catholic priests behind it, and how their quest contributed to the search for extraterrestrial life.
By etching grooves into metal with a high-powered laser, physicists create a surface that repels water to the extent that droplets bounce away.
History shows us that social scientists are essential if we are to get the most out of our engineering and technological innovations