| 1 | "A key issue for piezoelectric materials is order, " he says. | |
| 2 | The key is a novel form of piezoelectric materials. | |
| 3 | So McAlpine' s team created nanoscale piezoelectric devices. | |
| 4 | The key is a novel form of piezoelectric materials. | |
| 5 | The main thing at work in the fibres is a type of piezoelectric polymer. |