Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao, 266071, P. R. China.
Industrial Research Institute of Nonwovens and Technical Textiles, College of Textiles and Clothing, Qingdao University, Qingdao, 266071, P. R. China.
Macromol Rapid Commun. 2019 Mar;40(5):e1800022. doi: 10.1002/marc.201800022. Epub 2018 Apr 20.
Regulating fluorescence lifetime of lanthanide nanocomposites is highly desired for optical multiplexing applications, for instance, security printing, anticounterfeiting, and data storage. Herein, sensitive fluorescence lifetime tuning in nanocomposite fibers is reported which are composed of silica-coated gold nanorods assembled in Eu-polystyrene nanofibers. The prepared nanofibers possess unique properties of tunable fluorescence lifetime and distinct textured patterns together with superior flexibility and superhydrophobicity. In a single 612 nm emission channel, over ten different populations of fluorescence lifetime from the range of 322-551 µs are harvested. Thanks to the tunable fluorescence lifetime and different textured patterns, a security pattern to demonstrate optical multiplexing applications is designed. The security pattern hides the real information of "69" in a noticeable scene that shows fake information "8" under UV radiation or "13" by only watching their pattern structures.
调控镧系纳米复合材料的荧光寿命对于光学复用应用非常重要，例如安全印刷、防伪和数据存储。在此，报道了由组装在 Eu-聚苯乙烯纳米纤维中的二氧化硅包覆的金纳米棒组成的纳米复合纤维中的灵敏荧光寿命调谐。所制备的纳米纤维具有可调谐荧光寿命和独特纹理图案的独特性质，同时具有优异的柔韧性和超疏水性。在单个 612nm 发射通道中，收集了荧光寿命范围为 322-551µs 的十个以上不同的荧光寿命群体。由于可调谐的荧光寿命和不同的纹理图案，可以设计用于光学复用应用的安全图案。安全图案将“69”的真实信息隐藏在一个明显的场景中，在紫外辐射下显示出虚假信息“8”，或者仅通过观察其图案结构显示出“13”。
