Tailoring Properties of van der Waals Layers by Surface Decoration with Nanomaterials

该项目将在范德瓦尔斯层(石墨烯和InSe薄片)的基础上开发2D/0D混合层，这些层由胶体量子点和其他纳米材料装饰。这些混合结构将通过控制胶体纳米颗粒的尺寸和组成，将2D层的独特传输特性与胶体纳米颗粒的可调光电特性结合在一起。我们将探索界面对纳米粒子向2D层电荷转移的影响，并将其用于控制表面掺杂效应。还将研究石墨烯附近的带电缺陷与纳米晶体中的带电缺陷之间的相互作用。我们将研究2D/0D界面的空间有序或电荷对器件性质的影响，目的是实现电荷关联，并创建具有可控周期势的2D/0D结构。对石墨烯中的静电势波动及其对载流子迁移率的影响的分析模拟将支持实验性的光学、形态和电学研究。该项目的成功将为大规模石墨烯(CVD、碳化硅-石墨烯)和InSe层中载流子浓度和迁移率的生长后控制及其在光电子器件中的应用提供一种新的策略。该项目符合并扩展了我们目前的研究，该研究得到了欧洲最大的研究计划之一--石墨烯旗舰的支持，该计划旨在将石墨烯从学术实验室的尖端科学研究转化为适销对路的产品。

The project will develop hybrid 2D/0D layers based on van der Waals layers (graphene and InSe flakes) decorated with colloidal quantum dots and other nanomaterials. These hybrid structures will combine unique transport properties of 2D layers with tuneable optoelectronic properties of colloidal nanoparticles by control of their size and composition. We will explore the effect of the interface on the charge transfer from nanoparticles to the 2D layer and will use it to control the surface doping effect. The interaction between charged defects in the vicinity of graphene and in the nanocrystals will also be investigated. We will study the effect of spatial ordering or charges at the 2D/0D interface on the device properties, aiming to achieve charge correlation and to create 2D/0D structures with controllable periodic potentials. Experimental optical, morphological and electrical studies will be supported by analytical simulations of electrostatic potential fluctuations in the graphene and its effect of carrier mobility. The success of this project will provide a new strategy for post-growth control of carrier concentration and mobility in large scale graphene (CVD, SiC-graphene) and in InSe layers, and for their functionalization for applications in optoelectronic devices. The project fits into and expands our current research supported by one of the largest European research initiatives, the Graphene Flagship, which aims to transfer graphene from cutting edge scientific research in academic laboratories to marketable products.