Reversible Fluorescent On–Off Recording in a Highly Transparent Polymeric Material Utilizing Fluorescent Resonance Energy Transfer (FRET) Induced by Heat Treatment
Reversible Fluorescent On–Off Recording in a Highly Transparent Polymeric Material Utilizing Fluorescent Resonance Energy Transfer (FRET) Induced by Heat Treatment
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DOI：
10.1002/adfm.200700994
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发表时间：
2008-10
影响因子：
19
通讯作者：
S. Hirata;K. Lee;Toshiyuki Watanabe
中科院分区：
文献类型：
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作者：
S. Hirata;K. Lee;Toshiyuki Watanabe
用于微小区域的高分辨率读出的一种生产性技术是材料的荧光信号的测量。本文报道了一种通过热控制长烷基链荧光染料和显色剂的聚集来改变和记录荧光量子产率的透明高分子材料。记录介质可以通过浇铸或涂覆记录材料容易地制造。在363 K下退火约12秒然后冷却至室温（RT）后观察到荧光，并通过在423 K下退火几秒然后淬灭至RT来淬灭。使用红色、绿色和蓝色荧光染料实现通过具有高于10的荧光对比度的激发光的非破坏性读出。荧光通-断切换是通过记录材料中从荧光染料到有色荧光烷染料的荧光共振能量转移（FRET）来诱导的。擦除后，荧光在可见光区均匀淬灭。由于在发射和猝灭状态下都存在小于可见光波长范围的晶体，因此记录材料允许激光穿透，因此可以通过双光子吸收实现荧光信号的非破坏性读出。这项工作为实现近场光存储或多层记录提供了重要的垫脚石。
One productive technique for ultrahigh resolution readout of tiny regions is the measurement of the fluorescence signal of materials. A transparent polymeric materials whose fluorescence quantum yield is changed and recorded by thermally controlling the aggregation of fluoran dyes and developers with long alkyl chains has been developed. The recording medium can be fabricated easily by casting or coating recording materials. Fluorescence is observed after annealing at 363 K for about twelve seconds and then cooling to room temperature (RT), and quenched by annealing at 423 K for a few seconds and then quenching to RT. Nondestructive readout by excitation light with a fluorescent contrast of above 10 is achieved using red, green, and blue fluorescent dyes. Fluorescence on–off switching is induced by fluorescent resonance energy transfer (FRET) from a fluorescent dye to a colored fluoran dye in the recording material. Fluorescence was uniformly quenched in the visible region after erasing. Since the recording materials allow the penetration of laser light due to the presence of crystals smaller than the wavelength range of visible light in both the emission and quenching states, nondestructive readout of the fluorescent signal by two‐photon absorption is accomplished. This work provides an important stepping‐stone for achieving rewritable‐type near‐field optical storage or multilayer recording.