The screen is one of the most vulnerable places of smartphones. Researchers at the University of Sussex (UK) have decided to correct this shortcoming by creating a touch screen of a material based on graphene and silver nanowires. According to the developers, it is characterized by high strength, flexibility and lower power consumption.
On most touch screens input is provided by a nano-layer of indium oxide and tin, which does not affect the transparency and conductivity of the glass. However, this is an expensive and very fragile material. A new screen, developed by scientists from Sussex – is a combination of silver nanofilaments with graphene. To put them together, they placed a one-atom-thick graphene film on the surface of water, and then “stamped” it on top of a layer of silver nanowires. This technology is quite simple and easy to scale. To do this, you can use conventional sprayers or patterned rollers.
According to the researchers, the use of graphene affected the cost of the sensor film.
“Adding graphene to the silver nanowire grid also improves its conductivity by about 10 times,” explains Alan Dalton, the team leader of the researchers. “This means that we can use less silver and will result in more economical screens with the same or better performance.”