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Scientists find new way to print with grafeeninkt antennas
Researchers have on a piece of paper an antenna of compressed printed graphene which was good enough to serve as a RFID tag. The antenna according to the makers to produce large-scale, flexible and less environmental impact than existing RFID antennas.
That writing researchers from the University of Manchester Tuesday in the journal Applied Physics Letters. Inks based on graphene and a solvent existed for some time, but must in order to act as a good conductor to be mixed with a binder. The binder must be subsequently be removed or change of structure, because it acts as an insulating material. Remove it, or annealing, happens at temperatures plastic or paper would not survive.
In order to circumvent the binding agent has developed the university together with one holding a way to improve the conductive properties anyway. This did the investigators by means of letting the drying after printing of the grafeeninkt in order then to print the whole with a roller. Then the graphene flakes are bulldozed.
Graphene ink Before and after pressing the graphene nanoflakes
After the pressing of the ink to the conductive features were over fifty times as well. Compared to “traditional” produced grafeeninkt, the guide was twice as good. The final printed antenna on paper was about 14 centimeters long and 3.5 millimeters wide, and beamed radio signals good.
Graphene-based RFID tags to the authors of the study, cheaper and simpler. Current RFID tags generally consist of aluminum, copper or other conductive materials. The actual scientific article is only Tuesday here available.Viewing:-210
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