Bald RFID-Chips zum Selberdrucken?
Posted by in Trends
Ist es bald möglich, RFID-Tags mit jedem handelsüblichen Drucker herzustellen. Wenn man einem Artikel bei RFIDgazette glaubt, so kann diese Vision schon bald Wirklichkeit werden und die zumeist teuren Spezialdrucker würden somit obsolet. Der Grund liegt in einer neuentwickelten Spezialtinte, die Silbernitrat enthält und somit leitfähig ist. So lesen wir in dem Artikel:
Printed RFID circuits may be here sooner than expected. And all it takes is a regular desktop printer. And a special solution containing Vitamin C and silver nitrate
Auch NewScientistTech widmet sich diesem Thema und geht ein wenig mehr ins Detail:
Being able to print out electronic components and whole circuit boards could provide an alternative to current manufacturing techniques, which are energy intensive and environmentally unfriendly.
Nun ja, ob Silbernitrat unbedingt umweltfreundlich ist, lasse ich mal dahingestellt. Doch lesen wir auch, wie das Drucken von RFID-Chips etc. funktioniert:
Bidoki loaded two separate chambers in the printer's cartridge, which normally contain different ink, with the metal solution and the reducing agent. Using silver nitrate solution as the "metal ink" and ascorbic acid (vitamin C) as the reducing agent proved the most successful combination.
He then programmed the printer to produce a variety of circuits and radio antennas on different surfaces including paper, cotton and acetate, all of which were placed in the printer like a normal sheet of paper.
"One test involved patterning an antenna like that used in a mobile phone on transparent film," says Clark. "It was possible to bend it almost in half without any loss of conductivity."
After a circuit is printed using silver nitrate, vitamin C is overlaid a few minutes later. Water can then be used to wash away other products, leaving the silver behind. Scanning electron microscope images reveal a rough surface of silver nanoparticles.
Auf jeden Fall eine interessante Idee …
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