文献类型：期刊文献

英文题名：Control over Aspect Ratio and Polymer Spatial Distribution of 2D Platelets via Living Crystallization-Driven Self-Assembly

作者：Xia, Tianlai[1];Xiao, Laihui[1];Sun, Kaiwen[2];Rho, Julia Y.[1];Xie, Yujie[3];Parkinson, Sam J.[1];Sangroniz, Leire[4,5];Zhang, Jian[1,6];Lin, Jiaping[2];Mueller, Alejandro J.[4,5,7];Gao, Liang[2];Dove, Andrew P.[1];O'Reilly, Rachel K.[1]

机构：[1]Univ Birmingham, Sch Chem, Birmingham B15 2TT, England;[2]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Ultrafine Mat,Minist Educ,Sch Mat Sci & En, Shanghai 200237, Peoples R China;[3]Shanghai Univ, Sch Med, Shanghai 200444, Peoples R China;[4]Univ Basque Country UPV EHU, Fac Chem, POLYMAT, Donostia San Sebastian 20018, Spain;[5]Univ Basque Country UPV EHU, Fac Chem, Dept Polymers & Adv Mat Phys Chem & Technol, Paseo Manuel Lardizabal 3, Donostia San Sebastian 20018, Spain;[6]Jiaxing Univ, Coll Mat & Text Engn, Jiaxing 314001, Peoples R China;[7]Basque Fdn Sci, IKERBASQUE, Bilbao 48009, Spain

年份：2024

卷号：57

期号：23

起止页码：11210

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20244917477607);WOS:【SCI-EXPANDED(收录号:WOS:001367667200001)】；

基金：T.X., J.Y.R., S.J.P., A.P.D., and R.K.O.R. thank the University of Birmingham for financial support. L.X. and J.Z. thank the China Scholarship Council for support. K.S., L.G., and J.L. thank the National Natural Science Foundation of China for financial support (22103025). Y.X. would like to thank the National Natural Science Foundation of China for financial support (22205133). L.S. and A.J.M. would like to acknowledge funding from the project MAT2017-83014-C2-1-P by MCIN/AEI/10.13039/501100011033 and by the Basque Government through grant IT1503-22. We thank Dr. Joao Correia for assistance with fluorescence characterization, and Dr. Joshua Deakin for assistance with XRD characterization.

语种：英文

外文关键词：Block copolymers - Elastomers - Self assembly

摘要：The aspect ratios of nano- and micrometer-sized features in nature have evolved to enable specific characteristics that are finely tuned for optimizing strength, surface area, optics, and heat dissipation. Despite the importance of aspect ratios, precise control over the aspect ratios of anisotropic polymeric nanoparticles is challenging to achieve and the formation mechanisms by which they occur are not fully understood. In this study, using the crystallization-driven self-assembly (CDSA) process, we achieved two-dimensional (2D) platelets with precisely controlled aspect ratios through the rational compositional adjustment of various polycaprolactone (PCL)-based homopolymers (HP) and block copolymers (BCP). These polymer compositions exhibit distinct polymer crystallization rates, which allow for highly controlled aspect ratios and polymer spatial distribution in 2D platelets. Brownian dynamics (BD) simulations provided an in-depth understanding of the formation of 2D platelets. The BD simulations help us further confirm the nature of living epitaxial growth, simulate the structural order of polymer chains during the CDSA process, and demonstrate the influence of PCL length on the aspect ratio. Our work opens up new possibilities for a nuanced understanding of the interplay between polymer composition, crystallization rate, and morphology, providing a method for the controlled synthesis of 2D nanostructures.