Scientists develop wearable activity sensors that monitor chemicals in the environment or in the body
Engineers and biologists from the Massachusetts Institute of Technology worked together to create an "active material" - a hydrogel sheet that has been implanted in living cells - a tough, elastic hydrogel sheet that has a bio-phase Capacitive, implanted cells are genetically modified to glow when exposed to specific chemicals.
In a paper published this week in the Proceedings of the National Academy of Sciences, researchers demonstrated the material as a novel sensor to monitor the tremendous potential of chemicals in the environment or the human body .
The researchers found that the hydrogels' moisture-rich environment helps maintain nutrients and maintain the viability of transgenic bacteria. As shown in the figure, when the bacteria respond to specific chemicals, the bacteria light up under the action of the gene.
The team used a cell implantable hydrogel to make a wide range of wearable sensors, including a rubber glove that shines when your fingertips touch chemical-contaminated surfaces. A bandage has also been made which will glitter when applied to a chemical-stained human skin.
Zhao Xuanhe, an associate professor of mechanical engineering at MIT, said his team developed active materials that have broad applications in detecting chemicals and contaminants. For example, from crime scene investigations to forensic sciences, from pollution monitoring to medical diagnosis.
"With this design, one can put different types of bacteria in the device to indicate toxins in the environment or skin conditions," said Timothy Lu, associate professor of bioengineering and electrical engineering and computer science. "Our results show Potential applications for active materials and related devices. "
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