China's giant step into nanotech

Nanotechnology is big business conducted on an atomic scale. China is a major player, using it for a speaker just 1mm thick - or super-strong armour Seated inside one of China's most advanced science laboratories, two PhD students dressed from head to toe in protective white suits listen intently to Mariah Carey's pop classic Hero. It is not the song, but the millimetre-thin, transparent strip making the sound that captures their attention - a nano-speaker they hope will revolutionise where, and...