期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 31, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202002473
关键词
colloidal crystals; mechanochromic sensors; pristine graphene; self-assembly; time-temperature indicators
类别
资金
- EPSRC [EP/L02263X/1 (EP/M008576/1), EP/M027791/1]
- EPSRC [EP/L02263X/1, EP/M027791/1] Funding Source: UKRI
High quality opal-like photonic crystals containing graphene are fabricated using evaporation-driven self-assembly of soft polymer colloids. A miniscule amount of pristine graphene within a colloidal crystal lattice results in the formation of colloidal crystals with a strong angle-dependent structural color and a stop band that can be reversibly shifted across the visible spectrum. The crystals can be mechanically deformed or can reversibly change color as a function of their temperature, hence their sensitive mechanochromic and thermochromic response make them attractive candidates for a wide range of visual sensing applications. In particular, it is shown that the crystals are excellent candidates for visual strain sensors or integrated time-temperature indicators which act over large temperature windows. Given the versatility of these crystals, this method represents a simple, inexpensive, and scalable approach to produce multifunctional graphene infused synthetic opals and opens up exciting applications for novel solution-processable nanomaterial based photonics.
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