Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 11, Pages 6796-6801Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b01991
Keywords
photonic crystal; colloidal crystal; structural color; film; angle independent
Funding
- National Science Foundation of China [21473029, 51522302]
- NSAF Foundation of China [U1530260]
- National Science Foundation of Jiangsu [BK20140028]
- Research Fund for the Doctoral Program of Higher Education of China [20120092130006]
- Program for New Century Excellent Talents in University
- Research Innovation Program for College Graduates of Jiangsu Province [KYLX_0189]
- Scientific Research Foundation of Southeast University
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Hydrogel colloidal crystal composite materials have a demonstrated value in responsive photonic crystals (PhCs) via controllable stimuli. Although they have been successfully exploited to generate a gradient of color distribution, the soft hydrogels have limitations in terms of stability and storage caused by dependence on environment Here, we present a practical strategy to fabricate free-standing PhC films with a stable gradient of structural colors using binary polymer networks. A colloidal crystal hydrogel film was prepared for this purpose, with continuously varying photonic band gaps corresponding to the gradient of the press. Then, a second polymer network was used to lock the inside non-close-packed PhC structures and color distribution of the hydrogel film. It was demonstrated that our strategy could bring about a solution to the angle-dependent structural colors of the PhC films by coating the surface with special microstructures.
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