Smells like Teen Spirit
Researchers at Duke University have developed “spray-on” digital memory using only an aerosol jet printer and nanoparticle inks.
According to Duke Today, the memory is a bit like a 4-bit flash drive, and is the first fully-printed digital memory that would be suitable for practical use in simple electronics such as environmental sensors or RFID tags.
Because it is jet-printed at low temperatures, it could be used to build programmable electronic devices on bendable materials like paper, plastic or fabric.
It is made from silica-coated copper nanowires encased in a polymer matrix, encodes information not in states of charge but instead in states of resistance.
It can be switched between a state of high resistance, which stops electric current, and a state of low resistance, which allows current to flow. Unlike silicon, the nanowires and the polymer can be dissolved in methanol, creating a liquid that can be sprayed through the nozzle of a printer.
Its write speed is three microseconds which is about the speed of flash drives and the information can be re-written many times. Stored data can last for a decade.
