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Preparing Semiconducting Nanoribbons with Tunable Length and Width via Crystallization-Driven Self-Assembly of a Simple Conjugated Homopolymer
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-11-30 , DOI: 10.1021/jacs.8b10406 Inho Choi 1 , Sanghee Yang 1 , Tae-Lim Choi 1
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-11-30 , DOI: 10.1021/jacs.8b10406 Inho Choi 1 , Sanghee Yang 1 , Tae-Lim Choi 1
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Precise control of width and length of one-dimensional (1D) semiconducting nanostructures has attracted much attention owing to its potential for optoelectronic applications. However, regulating both their length and width using conjugated polymers or even block copolymers is a huge challenge. To solve this problem, we synthesized a unique conjugated polyacetylene homopolymer by living cyclopolymerization, which spontaneously formed 1D nanoribbons via in situ nanoparticlization. Interestingly, their widths could be controlled from 8 to 41 nm, which were directly proportional to their degree of polymerization. Furthermore, a self-seeding technique via crystallization-driven self-assembly (CDSA) was used to control the length of the nanoribbons up to 5.2 μm with narrow distributions less than 1.1. Interestingly, adding a block copolymer unimer to these nanoribbons produced triblock comicelles by the living CDSA mechanism. Finally, these nanoribbons were visualized directly by super-resolution optical fluorescence microscopy. Now, one can modulate both length and width of 1D nanoribbons simultaneously.
中文翻译：
通过简单共轭均聚物的结晶驱动自组装制备长度和宽度可调的半导体纳米带
一维 (1D) 半导体纳米结构的宽度和长度的精确控制因其在光电应用方面的潜力而备受关注。然而，使用共轭聚合物甚至嵌段共聚物来调节它们的长度和宽度是一个巨大的挑战。为了解决这个问题，我们通过活性环聚合合成了一种独特的共轭聚乙炔均聚物，通过原位纳米颗粒化自发形成一维纳米带。有趣的是，它们的宽度可以控制在 8 到 41 nm 之间，这与它们的聚合度成正比。此外，通过结晶驱动自组装（CDSA）的自接种技术被用来控制纳米带的长度高达 5.2 μm，并且分布较窄，小于 1.1。有趣的是，将嵌段共聚物单体添加到这些纳米带中，通过活性 CDSA 机制产生了三嵌段胶束。最后，通过超分辨率光学荧光显微镜直接观察这些纳米带。现在，人们可以同时调节一维纳米带的长度和宽度。
更新日期：2018-11-30
中文翻译：
通过简单共轭均聚物的结晶驱动自组装制备长度和宽度可调的半导体纳米带
一维 (1D) 半导体纳米结构的宽度和长度的精确控制因其在光电应用方面的潜力而备受关注。然而，使用共轭聚合物甚至嵌段共聚物来调节它们的长度和宽度是一个巨大的挑战。为了解决这个问题，我们通过活性环聚合合成了一种独特的共轭聚乙炔均聚物，通过原位纳米颗粒化自发形成一维纳米带。有趣的是，它们的宽度可以控制在 8 到 41 nm 之间，这与它们的聚合度成正比。此外，通过结晶驱动自组装（CDSA）的自接种技术被用来控制纳米带的长度高达 5.2 μm，并且分布较窄，小于 1.1。有趣的是，将嵌段共聚物单体添加到这些纳米带中，通过活性 CDSA 机制产生了三嵌段胶束。最后，通过超分辨率光学荧光显微镜直接观察这些纳米带。现在，人们可以同时调节一维纳米带的长度和宽度。
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