People believe that sooner or later, robots will have “tactile feelings.†Scientists are racing to study various pressure sensors and advanced materials and hope to put them on the skin as soon as possible. According to the report of the Physicist Organization Network on March 30 (Beijing time), chemists at the University of Pittsburgh and the Massachusetts Institute of Technology have taken another path to demonstrate a BZ gel that will automatically deflate and relax. After applying a certain amount of mechanical pressure, the original The non-beating BZ gels can resume beating again, just like in medical CPR. Researchers point out that there are very few materials that can mimic this property and therefore have a wide range of application prospects, which will help to further study advanced materials that can sense mechanical stimuli and chemical reactions. Related papers were published on March 26th in Advanced Functional Materials.
The BZ reaction is a chemical oscillation phenomenon discovered by former Soviet Union biochemist Belosov and biophysicist Zabotinski. The solution alternately presents two colors. BZ gels based on the BZ oscillatory reaction were first made in the late 1990s. The gels also exhibit rhythmic contraction and relaxation without any external stimulus, and a BZ gel under appropriate conditions. On the plate, it will be like a heart that is beating.
A team led by Anna Barlats, professor of chemistry and petroleum engineering at the Swanson School of Engineering at the University of Pittsburgh, put forward a prediction of the nature of BZ glue. Barracl believes that by applying a certain mechanical pressure to the BZ glue that is no longer oscillating, it can resume oscillation again. Researchers at the Massachusetts Institute of Technology confirmed this hypothesis by applying a certain amount of mechanical pressure to the BZ glue. When the critical pressure is exceeded, chemical oscillations can be initiated.
“A part of the human skin is deformed or injured, and it sends a signal to the brain. This glue is very similar to human skin.†Baratz explained, “The creation of artificial skin that is as perceptive as human beings is a holy grail for robotics. ."
There are more applications for BZ gel to be developed, such as the automated transportation of smart surfaces. Baratz said that, in addition, it can also be installed on various tools and instruments as small pressure sensors. As long as you can see whether they will beat, you can judge various surface influences. (Reporter Chang Lijun)
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