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首页> 外文期刊>RSC Advances >Electrostatically driven scalable synthesis of MoS2-graphene hybrid films assisted by hydrophobins
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Electrostatically driven scalable synthesis of MoS2-graphene hybrid films assisted by hydrophobins

机译：静电驱动可扩展的疏水素辅助MOS2-石墨烯杂种膜的合成

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Liquid processing of 2D crystals offers scalable strategies for the production of 2D materials. Herein, we produce the hybrids of MoS2/graphene, consisting of few-layered nanosheets of luminescent MoS2 and biofunctionalized few-layered graphene assisted by the Vmh2 hydrophobin, a self-assembling adhesive fungal protein, through a green route of production. The functionalization of the graphene flakes assisted by Vmh2 adds surface charge, which enables electrostatic interaction between MoS2 and graphene flakes, leading to the van der Waals coupling. The surface morphology of 2D material based films is analyzed through optical imaging, scanning and transmission electron microscopy. The produced dispersions of MoS2, bGr and the hybrid solutions, are investigated by electrophoretic mobility, UV-Vis, Raman and photoluminescence spectroscopy. Interestingly, the effect of van der Waals interactions between the layers of MoS2 and bGr crystals are evidenced through the significant upshift of 14 cm(-1) in the G' Raman peak of graphene and an upshift of 1.4 cm(-1) of the A(1g) peak of MoS2. Due to the formation of heterostructures, significant quenching of the characteristic photoluminescence emitted from the monolayers of MoS2 was also observed, indicating the charge transfer process occurring between the crystal layers. This approach of scalable synthesis of 2D material based nano-bio hybrids offers economic and eco-friendly solutions to promote novel applications in biosensing and photodetection.
机译：2D晶体的液体加工为生产2D材料提供可扩展策略。在此，我们生产MOS2 /石墨烯的杂种，由少量层状的发光MOS2和生物官能化的少量层状石墨烯由VMH2疏水蛋白，自组装粘合性真菌蛋白辅助，通过绿色生产途径。 VMH2辅助的石墨烯片的官能化增加了表面电荷，这使得MOS2和石墨烯片之间的静电相互作用，导致VAN DAL WAALS联轴器。通过光学成像，扫描和透射电子显微镜分析2D材料基膜的表面形态。通过电泳迁移率，UV-Vis，拉曼和光致发光光谱研究MOS2，BGR和杂化溶液的产生分散体。有趣的是，MOS2和BGR晶体层之间的范德瓦尔斯相互作用的影响通过G'Raman峰的G'Raman峰的显着升乘和升档为1.4cm（-1） MOS2的（1G）峰值。由于异质结构的形成，还观察到从MOS2的单层发射的特征光致发光的显着猝灭，表示在晶体层之间发生的电荷转移过程。基于2D材料的纳米生物混合动力车可扩展合成的这种方法提供了经济和生态友好的解决方案，以促进生物传感和光检测的新应用。

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