Researchers have developed a low-cost, bioelectric sensor that detects neuromuscular diseases. The sensor measures electromyography signals generated in muscles when they contract. The biosensor made of silver paste with a goldenLayer of nanoparticlescan also be integrated directly into a piece of clothing. The result was a detector that was both conductive and non-irritating to the skin.
Using innovative biotechnology against neuromuscular diseases
Bioelectric sensors on the skin can help measure electrical signals in the body, such as heart activity and muscle contraction. While the new research provides valuable information for clinicians, traditional bioelectric sensor technology can be ineffective, inconvenient, expensive and difficult to manufacture. The developers of the sensor report that signals they measure during muscle activity represent voltage over a certain period of time. Since this can be integrated into clothing, this offers better skin contact and stronger signal transmission. First, the researchers printed silver paste directly onto fabric. Silver is conductive, making it a good material for detecting electrical signals. However, it is also somewhat toxic, so prolonged exposure can cause skin irritation. To solve such problems and get the full benefit from them, the team deposited a layer of gold nanoparticles on the silver. The gold completely encapsulates the silver particles and prevents them from touching the skin.
The amounts of gold and silver used by the research team for the project were small enough to remain cheap. The scientists tested the performance of the biosensor by placing it on the biceps and fingers and monitoring the detected signal as these muscles performed various exercises. Since the sensor is part of the fabric and is designed to last for a long time, it should be able to withstand washing. In addition, the researchers retested the sensor performance after several washes and found that it remained high.This studynot only offers a wearable device that has the convenience factor, but also excellent performance and biocompatibility, say the authors. The team believes that using this printing technique on textiles could revolutionize future bioelectric sensors.
