|
Authors
|
Wang, J. J. ; Zheng, Y. ; Li, L. ; Liu, E. ; Zong, C. Y. ; Zhao, J. X. ; Xie, J. ; Xu, F. ; König, T. ; Saphiannikova, M. ; Cao, Y. P. ; Fery, A. ; Lu, C. H.
|
|
Title
|
All-optical reversible azo-based wrinkling patterns with high aspect ratio and polarization-independent orientation for light responsive soft photonics
|
|
Date
|
21.08.2019
|
|
Number
|
57027
|
|
Abstract
|
Azobenzene-containing polymers (azopolymers) can serve as building blocks for an emerging class of soft photonics. Using their photoresponses for the micro/nanofabrication of smart surface is a key but still a challenging step. Here, we report a simple visible-light-illumination strategy to trigger diverse configurations of surface wrinkling on azopolymer-based film/substrate systems, which can be switched between flat and wrinkled states by controlling the intensity of the incident light. Different photoresponsive characteristics of azobenzene are involved in driving the wrinkling/dewrinkling switch. For the first time, we achieve the controlled wrinkling with an unexpected high aspect ratio and surprisingly polarization-independent ordered orientation by exploiting the unique photosoftening effect of azobenzene. Theoretical analysis reveals that an in situ photoinduced reversible soft/hard-contrast boundary determines the wrinkling orientation, which is used to fabricate diverse on-demand hierarchical wrinkles. These photoresponsive systems find broad photonic applications that are not easily accessible to other systems, e.g., optically reversible smart display, information security, and well-regulated optical devices.
|
|
Publisher
|
ACS Applied Materials & Interfaces
|
|
Wikidata
|
|
|
Citation
|
ACS Applied Materials & Interfaces 11 (2019) 25595-25604
|
|
DOI
|
https://doi.org/10.1021/ACSAMI.9B07349
|
|
Tags
|
|
