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Published on: April 7, 2017
Multi-Functional Hydrogels Simultaneously Featuring Strong Fluorescence, Ultralong Phosphorescence, and Excellent
Xin Jiang1, Menglin Wu1, Lu Zhang1
1Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Jiangsu, Suzhou 215123, China.
Abstract:
Herein, we present a class of multi-functional hydrogels, which simultaneously features strong fluorescence, ultralong room-temperature phosphorescence (RTP), and excellent self-healing properties. In particular, the as-prepared hydrogels could produce strong fluorescence with a photoluminescence quantum yield (PLQY) value of 22.4%, as well as ultralong RTP (lasts for ∼20 s with phosphorescence lifetime of ∼264 ms). In addition to the superior optical performance, the as-prepared hydrogels possess excellent self-healing property, with ∼91.5% self-healing efficiency at room temperature and an increased elasticity of ∼281%. Taking advantages of these unique merits, we further exploit such high-performance hydrogels for advanced anti-counterfeiting applications. Significantly, the hydrogel-based anti-counterfeiting tags are capable of realizing multi-color static information in the spatial scale and more than five kinds of dynamic information during 15 s of the phosphorescence decay process in the temporal scale.
