- Hong Kong scientists develop artificial skin that senses injuries and mimics real bruises
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Hong Kong scientists develop artificial skin that senses injuries and mimics real bruises

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When someone hits their elbow, they not only feel pain, but they may also suffer bruising. There are no warning signs on the prosthesis, which could lead to further injury.
Therefore, scientists in Hong Kong have developed artificial skin that senses injury through ionic signals and also changes color from yellow to purple, similar to real bruising, and provides a visual indication of damage.

The substance, called I-skin, can be used on artificial limbs to warn users that they have damaged their limbs.

The technique involves a gel that turns from yellow to purple, similar to bruises that occur when exposed to physical pressure.

Hong Kong scientists develop artificial skin that senses injuries and mimics real bruises
Hong Kong scientists develop artificial skin that senses injuries and mimics real bruises


Wearing I-skin strips on their fingers, hands and knees, volunteers repeatedly banged their limbs against a wall, ensuring the appearance of a 'bruise'.

“Sensor-capable synthetic leather has great potential in applications of wearables and soft robotics,” the scientists from the Chinese University of Hong Kong wrote in a new report published in the journal ACS Applied Materials & Interfaces.

A report in New Atlas reported that the skin could be flexed and stretched without changing its colour, although this affected its electrical signals. But repeated or forceful beating or pressure brings the eggplant color to the surface, as evidenced by a recent video.To develop a material that mimics human bruises, engineer Wenlian Qiu and her team developed an ionic hydrogel saturated with spiropyran, a molecule that approaches the blue-violet shade of a bruise when subjected to "significant deformation," according to their report.

The scientists said that the color remains visible for between two and five hours.

In addition to prosthetics, the technology can also be used in wearable electronic devices or even robots, to indicate damage or make it more "real".

Engineers are increasingly working on artificial skin that not only mimics the appearance of real skin, but also interacts with it, used with prosthetics and robots expected to communicate with humans.

And last September, scientists at RMIT University in Australia announced that they had developed a material that can "feel" pain in the same way as a real organ.

"The skin is our body's largest sensory organ, with complex features designed to send quick warning signals when something is hurting," lead researcher Madhu Bhaskaran said in a statement. "We sense things all the time through the skin but our response to pain only begins at a certain point, such as when we touch Something very hot or very sharp."The journal Advanced Intelligent Systems reported that the artificial skin copies human nerves with electrical signals to trigger an immediate reaction.

There are no electronic technologies that can realistically simulate the human feeling of pain, yet.
Synthetic skin reacts instantly when pressure, heat or cold reach a painful threshold.

Source: Daily Mail
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