The team of Stanford University’s Bao Zinnan laid the foundation for the development of electronic components by pushing the concept of “artificial skinâ€. They not only demonstrated the precision stretchable electronic components that can feel the ladybug legs, but also demonstrated The process of manufacturing such components on a large scale. Humans can feel the world in many ways, our vision, hearing, smell, taste, and touch. Our hands-on perception of the world benefits from our sensitive fingertips. Before we touch the flame, we can feel the heat and feel the tenderness and softness of the newborn's face.
Image source: Stanford University
But for those who wear prosthetics, they lose this ability. The team led by Prof. Bao Zhenan from Stanford University has been working on the development of “tactile†“artificial skin†for many years. In fact, this is a unique electronic component that can be stretched and made of sensitive electronic materials that can sense the current changes caused by tiny pressures.
In an article published in Nature on the 19th, the team described two technical breakthroughs: the first was that they created a scalable polymer circuit that could detect an artificial bug with an integrated tactile sensor. Weak footprints. While this technological achievement is a milestone in itself, the second is a more realistic development, a method of mass production of this new flexible, scalable electronic prototype – a key step on the road to commercialization. .
“Research on artificial skin and flexible electronics has made great progress, but until now no one has proven the process of reliably producing stretchable circuits,†says Bao.
Image source: Stanford University
The team achieved the perfect integration of several layers of polymer, some of which provided the stretchability of the device, and others as an insulator to isolate the electronically sensitive material. One of them is the use of inkjet printers to draw circuits on specific coatings. The team has successfully made its material into a square of about two inches, with more than 6,000 independent signal processing devices, just like synthetic nerve endings. All of these are packaged in a waterproof protective layer.
This prototype can be stretched to twice its original size while maintaining its ability to conduct without cracks, delamination or wrinkles. To test durability, the team performed more than 1000 stretches on the sample without causing significant damage or reduced sensitivity. When the researchers glued their samples to the irregular surface of the human hand, the effect was still very good.
One day, the surface of the prosthesis may be covered by this flexible electronic material, but before that, this technology may bring us new flexible electronic devices that revolutionize existing rigid electronic devices. change.
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