Stress-induced self-assembly of hierarchically twisted stripe arrays  

分级扭曲介孔条纹阵列的应力诱导自组装

作　　者：Zhenghao Zhang Zekai Zhang Junyu Hou Yiyue Zhao Jia Jia Jiwei Wang Jie Zhao Cheng Lian Angang Dong Dongyuan Zhao Wei Li 张政豪;章泽错;侯俊宇;赵怡越;贾佳;王季伟;赵婕;练成;董安钢;赵东元;李伟

机构地区：[1]Department of Chemistry,Laboratory of Advance Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,State Key Laboratory of Molecular Engineering of Polymers,and iChEM,Fudan University,Shanghai 200433,China [2]School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Science Bulletin》2025年第5期704-711,共8页科学通报(英文版)

基　　金：National Key R&D Program of China(2022YFA1503501 and 2022YFA1504103);National Natural Science Foundation of China(22088101 and U21A20329);Program of Shanghai Academic Research Leader(21XD1420800);Shanghai Pilot Program for Basic Research-FuDan University 21TQ1400100(21TQ008);Shanghai International Science and Technology Partnership Project(23520750400);"Shuguang Program"supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission(22SG02);Fundamental Research Funds for the Central Universities(20720220010).

摘　　要：Hierarchical organization is prevalent in nature,yet the artificial construction of hierarchical materials featuring asymmetric structures remains a big challenge.Herein,we report a stress-induced self-assembly strategy for the synthesis of hierarchically twisted stripe arrays(HTSAs)with mesoporous structures.A soft and thin mesostructured film assembled by micelles and TiO_(2) oligomers is the prerequisite.Then,the external stress coming from the exfoliation process triggers the deformation of this mesostructured film into hierarchically twisted structures.The stripe width and twist degree can be well manipulated by adjusting the cross-linking degree and thickness of the mesostructured films.Furthermore,this strategy is facile and versatile to synthesize HTSAs with diverse components,including carbon,Al2O3 and ZrO2.We find that mesoporous TiO_(2) HTSAs can serve as an ideal integrator for adsorption-enrichment-detection process,exhibiting a rapid and high adsorption capacity towards molecules at low concentrations and enabling the subsequent surface-enhanced Raman scattering(SERS)detection.Such twisted stripe arrays achieve 2.3-fold and 5.6-fold enhancements in SERS compared with flat surfaces and solution conditions,respectively,due to the increased Raman scattering among the hierarchical,twisted,and mesoporous structures.

关 键 词：Mesoporous materials Hierarchical structures SELF-ASSEMBLY Surface-enhanced Raman scattering 

分 类 号：TB3[一般工业技术—材料科学与工程]