文献类型：期刊文献

英文题名：Tailoring Self-Assembly of Alternating Copolymers for Ordered and Crystalline 2D Nanostructures via Diverse Strategies

作者：Gao, Yumeng[1];Miao, Han[1];Qian, Jie[1];Yao, Yuan[1];Yuan, Jiayin[2];Lin, Shaoliang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden

年份：2024

卷号：57

期号：12

起止页码：5656

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20242416251091);WOS:【SCI-EXPANDED(收录号:WOS:001242744600001)】；

基金：The authors are greatly thankful to the Shanghai Synchrotron Radiation Facility (SSRF) for helping with the solution-phase wide-angle X-ray scattering (WAXS) measurements. This work was financially supported by the National Natural Science Foundation of China (52073094, 52273291, 52073092, 52325308, and 52203258), the Projects of Shanghai Municipality (20ZR1415600), and the Shanghai Pujiang Program (21PJ1402100).

语种：英文

外文关键词：Crystalline materials - Crystallinity - Precision engineering - Remote control - Self assembly - Substrates

摘要：The pursuit of ordered two-dimensional (2D) materials with customized properties has fueled extensive research. While many established fabrication methods rely on substrates, solution-based polymer self-assembly processes remain much unexplored. Here, by manipulating the delicate balance between dominating and competing forces, we demonstrate how polymer chains fold, self-adjust, and self-assemble into diverse ordered 2D nanostructures in solution guided by an energy landscape, especially highly ordered crystalline structures, which are of great challenge to realize by polymers. An alternating copolymer initially self-assembled into 2D planar flakes via a kinetic pathway, lacking crystallinity. Through thermal annealing, they overcame a local kinetic barrier, in situ transforming into 2D circular crystalline clusters. Furthermore, by facilely replacing alkenyl linkers with triazoles in the alternating copolymers, additional tunable competing interactions were introduced, enabling the system to take thermodynamically favored pathways from the beginning and form 2D crystalline spindles directly. Besides, both the systems exhibited reversible self-assembly behavior and remote-controllable merit under light irradiation, forming 2D crystalline structures including flowers and spindles, respectively, highlighting the systems' responsiveness and versatility. This study offers diverse and facile strategies for constructing and fine-tuning tailorable nanostructures, suggesting promising applications in precision engineering and biomedical technologies.