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Researchers at the National Institute of Materials Science and the Massachusetts Institute of Technology (MIT) said that when the chemical sensor is exposed to electrophilic toxic gases, its conductivity will increase 3000 times. They implanted the sensor in a Near Field Communication (NFC) tag and embedded the NFC tag in the phone's smart card, allowing the smartphone to detect the presence of toxic gases in the air within 5 seconds. Detection levels were as low as 10 ppm ( One hundred thousandth).
Today, humans are still often exposed to toxic gases from nature. However, currently available sensors for detecting toxic gases are generally expensive, bulky, bulky, and complicated to operate.
According to the researchers, the new device consists of a group of carbon nanotubes (CNTs) coated with supramolecular polymers, which are grouped together by weak interactions. This design reduces their production costs. Carbon nanotubes (CNTs) themselves are highly conductive materials, but their conductivity is deteriorated when they are covered with a supramolecular polymer. When exposed to toxic gases, the weaker chemical bonds in the supramolecular polymer molecules are destroyed, and the conductivity of the carbon nanotubes increases. Users can determine whether there is toxic gas in the air by placing an NFC tag integrated with the sensor in an NFC-compatible smartphone while ensuring smooth communication between the two devices.
(Original title: A sensor that enables toxic gas detection in smart phones)
[China Instrument Network Instrument Development] According to reports, researchers have developed an inexpensive sensor that can be integrated into electronic circuits. This sensor allows the smartphone to detect toxic gases in the air within seconds.