electrochromic transistor changes the color of any surface

Researchers Elvira Fortunato and Rodrigo Martins from the New University of Lisbon (my alma matter!), developed a resistor that can change the color of any material: paper, polymers, glass, ceramics, metal, you name it. The technology actually consists in a solution, composed of electrochromic nano particles, i.e. the transistor and the pixel are one and the same, that can be applied to any surface and even used in regular printers by simply pouring it into the ink cartridge. Currently the researchers are using 0.3 and 0.4 mm transistors but Martins notes that they can go as small as one micron which will highly enhance the quality of the image. The cherry on top of the cake is that this technology is actually cheaper than LCDs and OLEDs, and recyclable!

This is the same research team that developed Paper-e: Green Electronics for the Future, which includes the paper resistor, produced for the first time at room temperature using a layer of paper for insulation, and the paper memory, a disposable and recyclable paper transistor memory that can hold information for up to 14,000 hours.

The video above is narrated in Portuguese but the images speak for themselves. For those of you who speak Portuguese, here’s some additional info at Expresso.

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