Bio-inspired sensitive and reversible mechanochromisms via strain-dependent cracks and folds.

Abstract:

:A number of marine organisms use muscle-controlled surface structures to achieve rapid changes in colour and transparency with outstanding reversibility. Inspired by these display tactics, we develop analogous deformation-controlled surface-engineering approaches via strain-dependent cracks and folds to realize the following four mechanochromic devices: (1) transparency change mechanochromism (TCM), (2) luminescent mechanochromism (LM), (3) colour alteration mechanochromism (CAM) and (4) encryption mechanochromism (EM). These devices are based on a simple bilayer system that exhibits a broad range of mechanochromic behaviours with high sensitivity and reversibility. The TCM device can reversibly switch between transparent and opaque states. The LM can emit intensive fluorescence as stretched with very high strain sensitivity. The CAM can turn fluorescence from green to yellow to orange as stretched within 20% strain. The EM device can reversibly reveal and conceal any desirable patterns.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zeng S,Zhang D,Huang W,Wang Z,Freire SG,Yu X,Smith AT,Huang EY,Nguon H,Sun L

doi

10.1038/ncomms11802

subject

Has Abstract

pub_date

2016-07-08 00:00:00

pages

11802

issn

2041-1723

pii

ncomms11802

journal_volume

7

pub_type

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