Tactile, self-healing robots are becoming a reality
Do you think that only the skin of a living body is flexible and resistant to pressure, has a touch, and can heal itself? Recent research has shown that Robotic skin can, too, perform better than human skin.
Using graphene, researchers at the University of Glasgow in the UK have developed an electronic robotic skin that is more tactile than the human hand.
According to foreign media reports, Ravinder Dahiya, a professor at the University of Glasgow, said that the newly developed robot skin is essentially a tactile sensor, and scientists will use it to create lighter prosthetic limbs, as well as Robots whose surface skin feels softer and more natural.
And this sensor is also the first step toward softer robots and more responsive touchscreen sensors.
This low-power smart robotic skin is made from a single atomic layer of graphene. The power per square centimeter of the skin is 20 nanowatts, which is equivalent to the lowest quality photovoltaic cells currently available. While the energy generated by the skin’s photovoltaic cells cannot be stored yet, the engineering team is exploring ways to transfer unused energy into the battery so it can be used when needed.
Graphene is a new type of nanomaterial with the thinnest, the strongest, and the strongest electrical and thermal conductivity. Due to its good strength, flexibility, conductivity and other characteristics, it is widely used in physics, materials science,digital informationIt has broad application potential in other fields.
In terms of optical properties, research data shows that the vertical absorption rate of single-layer graphene for visible light and near-infrared light is only 2.3%.
“How to get sunlight through the skin covering the photovoltaic cells was our real challenge,” Ravinder told Advanced Functional Materials.nal Materials).
“No matter what kind of light it is, 98 per cent of it reaches the solar cell,” Dahiya explained to the BBC. The electricity generated by the solar cell is used to create the sense of touch. “Its touch is an order of magnitude better than human skin.”
The skin gives the robotic arm the pressure feedback it deserves, allowing it to better control the force with which it grasps objects, allowing even fragile eggs to be picked up and put down firmly.
“The next step is to develop the power generation technology to support this research and use it to drive the prosthetic hand,” Dahiya said.motor, which could allow us to create a fully energy autonomous prosthesis. “
In addition, the superior performance of the robot skin is not expensive, Dahiya said that the new skin of 5-10 square centimeters costs only $1. In fact, graphene can do much more than give a robotic arm a sharp touch, it can also help the robot’s skin heal itself.
According to futurism, the latest research published by Indian scientists in the journal Open Physics found that graphene has a powerful self-healing function. Scientists hope to apply this feature to the field of sensors, so that robots can also have the same skin self-healing function as humans.
The traditional metal robot skin has poor ductility and is prone to cracks and breakage. However, if sub-nanometer sensors made of graphene can sense cracks, the robotic skin could stop the cracks from growing further, or even repair them. Research data shows that the automatic repair function is automatically activated when the fracture exceeds the critical displacement threshold.
“We hope to observe the self-healing behavior of pristine and defective monolayer graphene through molecular dynamics simulation process, and also observe the behavior of graphene in the process of sub-nanometer sensor crack localization.” In an interview, the lead author of the paper “We were able to observe graphene’s self-healing behavior at room temperature without any external stimulus,” said Swati Ghosh Acharyya.
Researchers from India say the technology will soon be put into use, perhaps in the next generation of robots.
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