Morphological transition and transformation of 2D nanosheets by controlling the balance of pi-pi stacking interaction and crystalline driving forces

Li, Heng1,2; Han, Liang1; Zhu, Yulin1; Zheng, Nan3; Lai, Hanjian1; Fernandez-Trillo, Paco2; He, Feng1,4

2022-08-01

10.1039/d2mh00891b

Materials Horizons   Impact Factor & Quartile

2051-6347

2051-6355

Nanoscale organic two-dimensional (2D) materials of block polymers (BCPs) have attracted interest on account of their wide potential applications in a range of fields. Herein, we design a new poly(p-phenylenevinylene) (PPV) based BCP that contains a triisopropylsilyl side chain and poly (2-vinyl pyridine) (P2VP) corona, which could assemble into a series of 2D square and rectangular micelles in isopropanol. The aspect ratios and the scales of the 2D micelles can be tuned in two ways, including altering the ratios of the P2VP and PPV-TIPS blocks and their concentrations. By precisely controlling the aspect ratios, micro-scale rod-like micelles are also obtained. From in depth studies of the morphology transition from rectangular micelles to rod-like or square micelles, it is found that the BCPs initially organize into fibers and then assemble into final micelles by the combined forces of pi-pi interactions and the crystalline force from TIPS side chains. Based on the balance of the two interactions, 2D circle-like micelles are also achieved by heterogenous co-assembly of two kinds of polymers with different cores.

SCI

English

First ; Corresponding

National Natural Science Foundation of China["21975115","21733005"] ; Guangdong Basic and Applied Basic Research Foundation[2020A1515 110845] ; Shenzhen Fundamental Research Programs["JCYJ20190809161413310","JCYJ20210324120010028"] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Shenzhen Sci-Tech Fund[KYTDPT20181011104007]

Chemistry ; Materials Science

Chemistry, Multidisciplinary ; Materials Science, Multidisciplinary

WOS:000844575600001

ROYAL SOC CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Grubbs Inst & Dept Chem, Shenzhen 518055, Peoples R China
2.Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England
3.South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Catalysis, Shenzhen 518055, Peoples R China

Li, Heng,Han, Liang,Zhu, Yulin,et al. Morphological transition and transformation of 2D nanosheets by controlling the balance of pi-pi stacking interaction and crystalline driving forces[J]. Materials Horizons,2022.

Li, Heng.,Han, Liang.,Zhu, Yulin.,Zheng, Nan.,Lai, Hanjian.,...&He, Feng.(2022).Morphological transition and transformation of 2D nanosheets by controlling the balance of pi-pi stacking interaction and crystalline driving forces.Materials Horizons.

Li, Heng,et al."Morphological transition and transformation of 2D nanosheets by controlling the balance of pi-pi stacking interaction and crystalline driving forces".Materials Horizons (2022).