According to Chinese researchers, sheets made of carbon nanotubes will act like a loudspeaker when charged with a varying electric current. This
could lead to a new era of cheap, flat speakers.
Shoushan Fan of the Tsinghua University in Beijing and his team have been working alongside a team of researchers at Beijing Normal University (a name that truly inspires confidence), to create the first speaker sheet by aligning numerous 10-nanometer-diameter carbon nanotubes. When an audio frequency current was sent through the sheet they found that it acted as a loudspeaker. While the reaction causes the sheet to heat up to temperatures of 80°C, it’s expected that consumer use will only cause the sheet to rise slightly above room temperature.
According to Kaili Jiang, a member of Fan’s team, the speakers have a great deal of potential in them for uses that you wouldn’t see from a conventional speaker. The team has found that the flexible sheets can be stretched until they become transparent. They could then be attached to the front of an LCD screen to replace standard speakers. They even mentioned the possibility of singing and speaking jackets.
Image Credit: New Scientist