Covalent organic modification and functionalization of eletrooptical nanowires

纳米线具有良好的表面积/体积比，结合了材料的半导体性。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，我们研究了氧化锌、InXGa1-xAs和InXGa1-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(带底漆或直接涂层)-沉积的空间寻址-通过应用有机涂层量身定做的性能为实现这一目标，必须制备适当的有机分子，其包含可在光或电流作用下被激活的基团。表面的物理性质将发生巨大变化，并可能消除以前对生理条件(如氧化锌)的浸出或不稳定的缺点。这些半导体纳米线的有机涂层将是两个设想的概念的基础。首先，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定亲和力的生色团。其次，纳米线的表面将负载有机分子。将研究刺激作用下的受控释放。用于解放的触发器利用半导体材料的电光特性--发射光或电流。半导体纳米线与有机环境的结合将为传感和释放系统提供新的混合结构，其尺寸几乎与生物细胞相同。所有任务只能在与这个合作研究小组中的这些合作伙伴密切合作的情况下执行。他们的实验、理论和技术专长将能够绕过当前的科学挑战，实现超越当前限制的新概念。我的团队将引进化学技术，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.