Tuesday 11 November 2008
There is so much potential in nanotechnology. Some researchers at Tsinghua University in Beijing have found that there are acoustic properties to exploit in sheets of carbon nanotubes such that they could form the basis of a new type of loudspeaker. Rather than relying on mechanical vibrations through any physical movement of the nanotube sheets, it exploits small temperature changes which occur when alternating electric currents are passed through them. Thus the pressure changes in the air (producing sound) are caused by thermal oscillations instead. Because the nanotube sheets can be flexed and formed into different shapes, it may be possible to weave a loudspeaker into clothing for example! Wearing your loudspeakers will be one way of taking your music with you!