Fabrication and Optical Properties of Fiber-Shaped Pseudoisocyanine J-Aggregates Grown Directly on a Glass Substrate.
Fabrication and Optical Properties of Fiber-Shaped Pseudoisocyanine J-Aggregates Grown Directly on a Glass Substrate.
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直接在玻璃基板上生长的纤维状准异氰酸酯 J-聚集体的制备和光学性能。
DOI：
10.1021/acs.jpcc.1c07303
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Takashi Kuroda
中科院分区：
文献类型：
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作者：
Ken Takazawa;Jun-ichi Inoue;Takashi Kuroda
我们开发了一种新的方法，通过溶液相自组装在玻璃衬底上直接生长氯化伪异氰酸酯(PIC-Cl)纤维状J-聚集体。形成了尺寸为22 mm×22 mm的J-聚集体纤维网络，均匀地覆盖了基片的整个表面积。此外，通过改变溶液浓度，可以在很宽的范围内(100 nm-5μm)控制光纤的宽度。我们发现用这种方法制备的纤维几乎是无穷无尽的。从端帽能的角度讨论了环形纤维的形成机理。我们对样品进行了光谱研究，发现它们的光学性质与光纤宽度有很强的相关性。根据光谱分析和低温荧光光谱的结果，我们认为光纤的宽度依赖可以归因于光纤中产生的无序密度的不同。
We developed a novel method for the direct growth of fiber-shaped J-aggregates of pseudoisocyanine chloride (PIC-Cl) on a glass substrate via solution-phase self-assembly. A network of J-aggregate fibers that homogeneously covered the entire surface area of the substrate with dimensions of 22 mm × 22 mm was formed. Moreover, the width of the fibers can be controlled over a wide range (100 nm–5 μm) by changing the solution concentration. We found that the fibers prepared using this method were nearly endless. The formation mechanism of the endless fibers was discussed in terms of end-cap energy. We performed spectroscopic investigations on the samples and found that their optical properties were strongly fiber-width-dependent. On the basis of the spectral analysis and the results from low-temperature fluorescence spectroscopy, we propose that the fiber-width-dependence can be attributed to a difference in the density of disorder created in the fibers.