Researchers have developed touchscreens containing carbon nanotubes that can be made of low-priced renewable raw materials (Image: Fraunhofer IPA)
Over the past decade, touchscreens have risen to dominate mobile phone and other mobile consumer electronic device interfaces – and their popularity shows no sign of waning. Capacitive touchscreens, the type most commonly used in consumer electronics, usually use a conductor made of indium tin oxide (ITO). This material is well suited to this purpose due to its excellent conductivity and its transparency in thin layers. Unfortunately there are few deposits of indium in the world, which has prompted a search for alternatives. One such new alternative are touchscreens containing carbon nanotubes, which researchers claim offer comparable performance to ITO, but are much cheaper.
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