RF sensors: from butterfly wings to "anti-terrorism" detection.Automatic machine mirror wholesaler

　　Engineers in the General Electric (GE) laboratory have been studying the Morpho butterfly, at least to some extent, to figure out what gives it a fluorescent coat. The results of the research have spurred the development of radio frequency (RF) sensors, which will be able to detect explosives and other chemicals at the size of a cent.

　　Radislav Potyrailo, chief scientist of chemical sensing, is leading a detector project team at GE Global Research Center. He spent several years studying the scales on the wings of the Morpho butterfly and discovered that when chemical molecules are attached, the complex structure of the scales can absorb and bend light. This is why the morpho butterfly and other butterflies are so colorful.

　　This device consists of two parts: the sensor tag and the tag reader. The sensor is a radio frequency identification (RFID) tag wrapped in an advanced chemical detection film. The reader is a battery-powered handheld reader, about the size of a mobile phone.

　　A GE blog post explained that light and radio waves are very similar, which opens the door to the use of RF sensors. This film is only one-tenth the thickness of a hair, and very little electricity can make it work-all of this is possible thanks to a combination of materials science, nanotechnology, chemistry, and data analysis. Those who drive to and from get off work will be familiar with such RFID tags. It is similar to the highway automatic toll payment technology on the windshield of a car, except that it does not have a battery.

　　This tiny device may be a game changer in detecting hazardous materials such as chemical combustion-supporting substances and explosives. The current detection work requires large and expensive equipment such as spectrum analyzers and chromatographs. The price of this new sensor is estimated to be between 5 and 50 cents, and is only three percent of the existing desktop detectors at the airport, and consumes only one percent of the latter. Various security checkpoints can use it to spot dangers and prevent them before they happen.

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