Journal
ADVANCED OPTICAL MATERIALS
Volume 2, Issue 7, Pages 652-662Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201300538
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Funding
- National Natural Science Foundation of China [21076103]
- Development Program of China (863 Program) [2012AA030313]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20103221110001]
- Industrial Project in the Science and Technology Pillar Program of Jiangsu Province [BE2012181]
- Natural Science Foundation of Jiangsu Province [BK20131408]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Mechanochromic materials which control their color variation by straightforward effective mechanical stimuli are useful for applications including switches, display devices, and sensors. It is still challenging to create mechnochromic materials with wide-range color tunability, fast response, and sensitivity to pressure <10 kPa. Here a facile strategy to fabricate very sensitive and reversibly mechanochromic elastic photonic hydrogels (EPHs) is demonstrated. The hydrogels exhibit reversible full-color variation within 1 s under each compression-decompression cycle. Importantly, EPH films display versatile touch-induced chromatic behavior even under forces below 0.5 N or pressures down to 1 kPa. Furthermore, rewritable displays on EPH films are realized by the exertion of forces without any external inks. This work may provide a new way to develop smart skin materials with integrated functions of tactile sensing and color variation, as well as touch-based flexible displays.
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