日期:2019-03-03 04:20:04 作者:琴跨 阅读:

By Barry Fox FEEL-GOOD PHONES Motorola has found a way to make the keypad on a cellphone give tactile feedback without wasting space on bulky vibration motors (patent application EP 1503272). The company’s answer is to coat the phone’s buttons with an electroactive polymer – a soft rubber with carbon nanotubes embedded in it. Applying a voltage induces stresses and strains in the bonds between the nanotubes and the rubber molecules, which can be felt. In Motorola’s phone,