Covalent organic modification and functionalization of eletrooptical nanowires

纳米线表现出优异的表面积/体积比与材料的半导体性质相结合。它们与专门设计和沉积的有机环境的相互作用几乎是未知的，并提供了独特的可能性。在这个合作研究项目中，我们研究了ZnO，InXGa 1-xAs和InXGa 1-xN纳米线的涂层。这项工作的目标包括： 开发可靠的涂层工艺（底漆或直接）- 沉积的空间寻址- 通过施加有机涂层来定制性能为了实现该目的，必须制备合适的有机分子，其含有在光或电流作用下可被活化的基团。表面的物理性质将发生显著变化，并可能消除以前的浸出或对生理条件不稳定的缺点，例如ZnO。这些半导体纳米线的有机涂层将是两个设想概念的基础。第一，安装荧光染料将允许使用猝灭来追踪爆炸物或其他非法物质。为此，必须连接对这些靶标具有特异性亲和力的发色团。其次，纳米线的表面将负载有机分子。将研究在刺激下的控制释放。释放的触发器利用半导体材料的电光特性-发射的光或电流。半导体纳米线与有机环境的结合将为具有几乎生物细胞尺寸的传感和释放系统提供新的混合结构。所有的任务只能在与这些合作伙伴在这个合作研究小组的密切合作。他们的实验、理论和技术专长将使我们能够规避当前的科学挑战，实现超越当前极限的新概念。我的团队将带来化学专业知识，并将提供非商业有机涂层材料。

Nanowires exhibit an excellent surface/volume ratio combined with a semiconducting nature of the material. Their interaction with a specifically designed and deposited organic environment is almost unknown and offers unique possibilities. Within this collaborative research project we study the coating of ZnO, InXGa1-xAs, and InXGa1-xN nanowires. The goals of this work include: - development of reliable coating processes (with priming or direct) - spatial addressing of the deposition - tailor-made properties by the application of organic coating To achieve this aim, suitable organic molecules have to be prepared containing groups which could be activated upon the action of light or electric current. The physical properties of the surface will change dramatically and might eliminate previous drawbacks of leaching or instability towards physiological conditions, e.g. ZnO. The organic coating of these semiconductor nanowires will be the basis of two envisioned concepts. First, the installation of fluorescent dyes will allow the use of quenching for the tracing of explosives or other illicit substances. For this purpose chromophores with a specific affinity to these targets have to be attached. Secondly, the surface of the nanowires will be loaded with organic molecules. The controlled release upon a stimulus will be studied. The trigger for the liberation employs the electrooptical properties of the semiconductor material – emitted light or electric current. The combination of semiconductor nanowires with an organic environment will provide access to novel hybrid structures for sensing and release systems which have almost the dimension of biological cells. All tasks can only be performed in a close collaboration with these partners in this collaborative research group. Their experimental, theoretical and technological expertise will enable the circumvention of present scientific challenges and realize novel concepts beyond the current limits. My group will bring in the chemical know-how and will provide the non-commercially organic coating materials.