GRAPHENE ENHANCED WEARABLE GAS SENSOR!!!

According to WHO, approx. seven million people die every year because of direct exposure to gaseous pollutants such as nitric oxides, amines, and volatile organic compounds in the environment.

For instance, consider an idea of a low-cost, lightweight, and flexible gas sensing device that can be easily wearable on skin or clothes. Wouldn’t it be a significant step for real-time monitoring of concentrations of these toxic gases in the environment to prevent further health issues? 

Dr. Ning Yan and the team of scientists from the University of Toronto developed r-GO enhanced gas sensor from Cedar tree dry matter (lignocellulosic cellulose nanofibrils -LCNF) to address these issues.

More elaborately, scientists firstly prepared the r-GO and LCNF based nanopapers by combining 10wt% rGO nanosheets suspension with the LCNF. Later PANI was grown on the LCNF/rGO nanopapers.

The sensor was then tested for the detection of ammonia, dimethylamine, and trimethylamine gases at the ppm range under RT and 20-25% RH.

For detection of these gases, the scientist fabricated a wearable device by immobilizing fabricated nanopaper on a glove. The sensor shows a remarkable sensitivity of 21.5% ppm to ammonia gas.

The optimized sensor is also tested against 100 ppm of dimethylamine and trimethylamine together with low responses to a range of interferant gases.

This study gives new insights into developing battery-free, real-time gas sensors with high sensitivity and good selectivity.

Link for complete article https://lnkd.in/g_gsNdXk

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