Anisotropic assembly and fluorescence enhancement of conjugated polymer nanostructures

Men, Xiaoju1; Fang, Xiaofeng2; Liu, Zhihe2; Zhang, Zhe2; Wu, Changfeng2; Chen, Haobin3

2022-09-01

10.1002/VIW.20220020

VIEW   Impact Factor & Quartile

2688-3988

2688-268X

The electronic properties of conjugated polymers depend sensitively on their conformation and morphology. However, control over the morphology of conjugated polymers is highly challenging. Here, we demonstrate a facile approach for assembling conjugated polymers into anisotropic nanostructures. In a water-tetrahydrofuran (H2O-THF) binary solvent, we prepared ellipsoidal nanoparticles, which can subsequently self-assemble into triangle-ring and rod-like nanostructures in a stepwise manner. The transitions among these morphologies can be rationally regulated by tuning the volume ratio of H2O to THF and the polymer concentration. The nanostructures show shape-dependent absorption from 383 to 403 nm and significant fluorescence enhancement with a quantum yield up to 70%. The oxetane groups in the polymer side chains and the presence of surfactant in the solvent are decisive for the anisotropic assembly. We further demonstrate multicolor fluorescent nanowires with good structural integrity over doping of dye molecules or other fluorescent polymers. Single nanowires were characterized by high-order super-resolution optical fluctuation imaging, which revealed spatial distribution of the photooxidation sites along single nanowire for easily generating hole polarons.

nanostructure nanowires fluorescence self-assembly semiconducting polymers

ESCI

English

Others

National Key R&D Program of China[2018YFB0407200] ; Shenzhen Science and Technology Program["KQTD20170810111314625","JCYJ20210324115807021"] ; Shenzhen Bay Laboratory[SZBL2021080601002] ; Changsha Natural Science Foundation[kq2202311]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Biomaterials

WOS:000852486400001

WILEY

Web of Science

1.Changsha Med Univ, Hunan Key Lab Res & Dev Novel Pharmaceut Preparat, Academician Workstn, Changsha, Hunan, Peoples R China
2.Southern Univ Sci & Technol, Dept Biomed Engn, Shenzhen, Guangdong, Peoples R China
3.Cent South Univ, Dept Biomed Engn, Sch Basic Med Sci, Changsha 410013, Hunan, Peoples R China

Men, Xiaoju,Fang, Xiaofeng,Liu, Zhihe,et al. Anisotropic assembly and fluorescence enhancement of conjugated polymer nanostructures[J]. VIEW,2022.

Men, Xiaoju,Fang, Xiaofeng,Liu, Zhihe,Zhang, Zhe,Wu, Changfeng,&Chen, Haobin.(2022).Anisotropic assembly and fluorescence enhancement of conjugated polymer nanostructures.VIEW.

Men, Xiaoju,et al."Anisotropic assembly and fluorescence enhancement of conjugated polymer nanostructures".VIEW (2022).