高速和连续波可编程发光标签
High-speed and continuous-wave programmable luminescent tags
摘要：
最近开发的大多数室温磷光（RTP）材料由于其不方便的结晶形态而缺乏实际意义。近年来，基于有机发光分子的可编程发光标签（PLT）被提出来，这种可编程发光标签使用无定形材料系统代替，具有易于加工和光滑的样品形状。在这里，通过分子氧（O2）和通过化学反应的激发单线态O2的消耗的发射体RTP的有效淬灭代表中心特征。通过定制的激活方案，高分辨率内容可以多次写入并随后擦除到这样的膜中，为信息存储提供了通用而简单的光子平台。然而，仍然存在两个重要的限制：（i）发射体的不可变荧光比磷光图案亮大约一个数量级，仅在激发源关闭后才允许读出PLT。(ii)这些系统的编程是一个相当缓慢的过程，其中报告的最低激活时间仍然> 8秒。在这里，演示了一种以材料为重点的方法，以实现PLT，其快速激活时间为120 +/- 20 ms，在连续波（cw）照明下具有高对比度，从而加速了行业相关时间尺度上的编程，并简化了通过眼睛和低成本相机的读出过程。
英文摘要：
Most materials recently developed for room temperature phosphorescence (RTP) lack of practical relevance due to their inconvenient crystalline morphology. Using amorphous material systems instead, programmable luminescent tags (PLTs) based on organic biluminescent emitter molecules with easy processing and smooth sample shapes were presented recently. Here, the effective quenching of the emitters RTP by molecular oxygen (O2) and the consumption of the excited singlet O2 through a chemical reaction represent the central features. With customized activation schemes, high resolution content can be written and later erased multiple times into such films, providing a versatile yet simple photonic platform for information storage. However, two important limitations remain: (i) The immutable fluorescence of the emitters outshines the phosphorescent patterns by roughly one order of magnitude, allowing read-out of the PLTs only after the excitation source is turned off. (ii) The programming of these systems is a rather slow process, where lowest reported activation times are still > 8 s. Here, a material-focused approach to PLTs with fast activation times of 120 +/- 20 ms and high-contrast under continuous-wave (cw) illumination is demonstrated, leading to accelerated programming on industry relevant time scales and a simplified readout process both by eye and low cost cameras.
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