Micrometer-Sized Rings Self-assembled from Thiacyanine Dye Molecules and Their Waveguiding Properties
Micrometer-Sized Rings Self-assembled from Thiacyanine Dye Molecules and Their Waveguiding Properties
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DOI：
10.1021/cm071762x
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发表时间：
2007-10
影响因子：
8.6
通讯作者：
K. Takazawa
中科院分区：
文献类型：
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作者：
K. Takazawa
为了制造微米级的环形波导，将具有不同链长范围从-C2H5到-C8H17的烷基的硫菁（TC）染料的氯仿溶液滴铸在玻璃基板上，并在不同条件下蒸发。研究发现，在高湿度条件下（相对湿度：∼90%）蒸发溶液时，具有-C8H17基团（TC8）的TC染料自组装成直径为5−30 μm的明确环。通过显微镜技术研究了各个环的形态和光学特性。环的偏光荧光显微镜图像显示出明显的偏振效应，表明环内的分子是高度有序的。根据环内分子排列讨论了成环机制。此外，通过空间分辨荧光显微镜研究了环的波导特性。结果发现 TC8 环引导...
To fabricate ring-shaped waveguides on a micrometer scale, chloroform solutions of thiacyanine (TC) dyes having alkyl groups of different chain lengths ranging from −C2H5 to −C8H17 were drop-cast on a glass substrate and were allowed to evaporate under different conditions. It was found that the TC dyes with −C8H17 groups (TC8) self-assembled into well-defined rings with diameters of 5−30 μm on evaporating the solution under highly humid conditions (relative humidity: ∼90%). The morphological and optical properties of the individual rings were investigated by microscopy techniques. The polarized fluorescence microscope image of the rings showed pronounced polarization effects, indicating that the molecules inside the rings are highly ordered. The mechanism of ring formation was discussed on the basis of the molecular arrangement within the rings. Furthermore, the waveguiding properties of the rings were investigated by spatially resolved fluorescence microscopy. It was found that the TC8 rings guided the...