Fabrication of Semiconducting Nanoribbons with Tunable Length and Width via Crystallization-Driven Self-Assembly of a Homopolymer Prepared by Cyclopolymerization Using Grubbs Catalyst,Macromolecules

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Fabrication of Semiconducting Nanoribbons with Tunable Length and Width via Crystallization-Driven Self-Assembly of a Homopolymer Prepared by Cyclopolymerization Using Grubbs Catalyst
Macromolecules ( IF 5.1 ) Pub Date : 2022-04-20 , DOI: 10.1021/acs.macromol.2c00400
Inho Choi ₁ , Sung-Yun Kang ₂ , Sanghee Yang ₃ , Namkyu Yun ₂ , Tae-Lim Choi ₂

Affiliation

Precise control of the width and length of one-dimensional (1D) semiconducting nanostructures is a topic of attention owing to the potential applications of such nanostructures in optoelectronics. However, regulating both the length and width of the 1D nanostructures using conjugated polymers or block copolymers is a significant challenge. To solve this problem, we synthesized a unique conjugated polyacetylene homopolymer via living cyclopolymerization, which spontaneously formed 1D nanoribbons via in situ nanoparticlization. Interestingly, their widths could be controlled from 11 to 42 nm, which is directly proportional to their degree of polymerization. Furthermore, a self-seeding technique via crystallization-driven self-assembly (CDSA) was adopted to control the length of the nanoribbons up to 2.3 μm with narrow distributions. Interestingly, adding a block copolymer unimer to these nanoribbons produced triblock comicelles by the living CDSA mechanism. The nanoribbons were visualized directly by super-resolution optical fluorescence microscopy. The proposed approach allows us to tune the length and width of 1D nanoribbons up to a certain degree.

中文翻译：

使用 Grubbs 催化剂通过环聚合制备的均聚物的结晶驱动自组装制备具有可调长度和宽度的半导体纳米带

由于这种纳米结构在光电子学中的潜在应用，精确控制一维（1D）半导体纳米结构的宽度和长度是一个关注的话题。然而，使用共轭聚合物或嵌段共聚物调节一维纳米结构的长度和宽度是一项重大挑战。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，它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 11 到 42 nm 之间，这与它们的聚合度成正比。此外，自播技术通过采用结晶驱动自组装（CDSA）将纳米带的长度控制在2.3μm以内，分布窄。有趣的是，将嵌段共聚物单聚体添加到这些纳米带中会通过活性 CDSA 机制产生三嵌段相聚体。通过超分辨率光学荧光显微镜直接观察纳米带。所提出的方法允许我们在一定程度上调整一维纳米带的长度和宽度。

更新日期：2022-04-20

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