Self-assembly and aggregation control of cyanine dyes by adsorption onto mesoscopic mica flakes
Self-assembly and aggregation control of cyanine dyes by adsorption onto mesoscopic mica flakes
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DOI：
10.1143/jjap.42.127
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发表时间：
2003-01-01
期刊：
影响因子：
--
通讯作者：
Kawatani, Y
中科院分区：
文献类型：
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作者：
Karthaus, O;Kawatani, Y
研究了1，1 '-二乙基-2，2'-异氰碘（PIC）在微米级云母片上的吸附行为。结果表明，所形成的J-聚集体的荧光光谱依赖于吸附时间和片状尺寸。随着吸附时间的增加，观察到荧光最大值从586 nm移动到583 nm。此外，有人发现，荧光最大值也取决于大小的云母片上的PIC被允许吸附。直径为10 μ m的薄片在583 nm处显示出最大值，而较小的薄片在586 nm处具有最大值。光漂白实验表明，照射导致缩短的J-聚集体。
We investigated the adsorption of 1,1'-diethyl-2,2'-isocyanine iodide (PIC) onto micrometer-sized mica flakes. It was found that the fluorescence spectra of the so-formed J-aggregates depend on the adsorption time and the flake size. With increasing adsorption time a shift of the fluorescence maximum from 586 to 583 nm was observed. Furthermore, it was found that the fluorescence maximum also depends on the size of the mica flake on which the PIC was allowed to adsorb. Flakes with a diameter of 10 mum show a maximum at 583 nm, whereas smaller flakes have a maximum at 586 nm. Photobleaching experiments showed that irradiation leads to a shortening of the J-aggregates.