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Hybrid Gels Assembled from Fmoc–Amino Acid and Graphene Oxide with Controllable Properties

Authors

  • Dr. Pengyao Xing,

    1. School of Chemistry and Chemical Engineering and Key Laboratory of Colloids and Interfaces, Chemistry of Ministry of Education, Shandong University, Jinan 250100 (P.R. China), Fax: (+86) 531 88564464.
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  • Dr. Xiaoxiao Chu,

    1. School of Chemistry and Chemical Engineering and Key Laboratory of Colloids and Interfaces, Chemistry of Ministry of Education, Shandong University, Jinan 250100 (P.R. China), Fax: (+86) 531 88564464.
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  • Dr. Shangyang Li,

    1. School of Chemistry and Chemical Engineering and Key Laboratory of Colloids and Interfaces, Chemistry of Ministry of Education, Shandong University, Jinan 250100 (P.R. China), Fax: (+86) 531 88564464.
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  • Dr. Mingfang Ma,

    1. School of Chemistry and Chemical Engineering and Key Laboratory of Colloids and Interfaces, Chemistry of Ministry of Education, Shandong University, Jinan 250100 (P.R. China), Fax: (+86) 531 88564464.
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  • Prof. Aiyou Hao

    Corresponding author
    1. School of Chemistry and Chemical Engineering and Key Laboratory of Colloids and Interfaces, Chemistry of Ministry of Education, Shandong University, Jinan 250100 (P.R. China), Fax: (+86) 531 88564464.
    • School of Chemistry and Chemical Engineering and Key Laboratory of Colloids and Interfaces, Chemistry of Ministry of Education, Shandong University, Jinan 250100 (P.R. China), Fax: (+86) 531 88564464.===

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Abstract

A supramolecular gel is obtained from the self-assembly of an ultralow-molecular-weight gelator (N-fluorenyl-9-methoxycarbonyl glutamic acid) in good and poor solvents. The gelators can self-assemble into a lamellar structure, which can further form twisted fibers and nanotubes in the gel phase. Rheological studies show that the gels are robust and rigid, and are able to rapidly self-recover to a gel after being destroyed by shear force. Fluorescence experiments reveal the aggregation-induced emission effects of the gel system; the fluorescence intensity is significantly enhanced by gel formation. Graphene oxide (GO) is introduced into the system efficiently to give a hybrid material, and the interaction between gelators–GO sheets is studied. Rheological and fluorescent studies imply that the mechanical properties and the fluorescent emission of the hybrid materials can be fine-tuned by controlling the addition of GO.

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