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    Preparation and self-assembly of graphene oxide-dye composite Langmuir films: Nanostructures and aggregations

    Year: 2017

    Journal: Colloid Surf. A-Physicochem. Eng. Asp., Volume 529, SEP 20, page 793–800

    Authors: Song, Jingwen; Ma, Kai; Jiao, Tifeng; Xing, Ruirui; Zhang, Lexin; Zhou, Jingxin; Peng, Qiuming

    Organizations: National Natural Science Foundation of China [21473153]; Support Program for the Top Young Talents of Hebei Province; China Postdoctoral Science Foundation [2015M580214]; Scientific and Technological Research and Development Program of Qinhuangdao City [201701B004]

    Keywords: Composite Langmuir film; Self-assembly; Graphene oxide; Aggregation; Dye

    Graphene oxide (GO)-based nanocomposite films via facile and appropriate self-assembly methods have demonstrated many potential applications in wide fields. This study demonstrates a facile and clean route to prepare graphene oxide-dye composite films using Langmuir-Blodgett (LB) technique at room temperature. By electrostatic interaction between cationic dye molecules and negatively charged GO sheets as well as pi-pi interactions, GO-dye composite LB films were formed spontaneously. As a soft platform for dye molecules, GO sheets induce dye molecules to self-assemble and form highly ordered structures containing H-aggregates and/or J-aggregates. The morphological characterization results show the formation of GO-dye composite films with smooth and dense surfaces. And the spectral results reveal that dye molecules stack in well-organized aggregates on the surface of GO sheets corresponding to monomers in bulk solution. The present research work about GO-dye composite films by LB method may provide new clues to prepare organized composite films and demonstrate potential applications in many fields.
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