04 August 2017
Vol 357, Issue 6350

About The Cover

Cover image expansion

COVER Artistically rendered segment of a synthetic macromolecular ladder scaffold, inspired by a natural product structure, that unzips through ring-opening in response to mechanical force. The ensuing mechanochemical metamorphosis of the insulating polyladderene structure into semiconducting polyacetylene nanowires rapidly transforms the material's intrinsic properties and functions. See page 475.
Illustration: Valerie Altounian/Science