Hybrids of Semiconducting Single-walled Carbon Nanotubes and Tailored Conjugated Polyelectrolytes as Selective Sensor Materials

大量的聚合物分选和良好定义的单壁碳纳米管（SWNT）的可用性，例如仅（6，5），使其能够应用于可再现的、溶液处理的电子器件，例如传感器。在这个项目中，我们将研究和定制的单壁碳纳米管/聚合物的相互作用，以设计和应用离子分析物，温度，甚至曝光的传感机制。我们将使用已建立的选择性分散技术创建纯半导体单壁碳纳米管分散体，并将包裹聚合物与新设计和合成的聚合物交换，即与特定阳离子（例如钾）结合或对pH变化敏感的共轭聚电解质;或具有特定温度和光敏侧链的共轭聚合物。我们将调查的纳米管/聚合物混合物的电子响应的存在下的分析物和刺激的拉曼和荧光光谱以及zeta电位测量。由于半导体纳米管在薄膜中表现出非常高的电荷载流子迁移率，因此可以将被分析物-聚合物-SWNT相互作用直接转换为电信号，其中纳米管作为水门场效应晶体管中的高效换能器作为传感器。光谱和电荷传输数据的结合将直接洞察半导体单壁碳纳米管和功能化共轭聚合物的电子相互作用取决于它们的环境。

The availability of large amounts of polymer-sorted and well-defined, e.g. only (6,5), single-walled carbon nanotubes (SWNTs) enables their application in reproducible, solution-processed electronic devices such as sensors. In this project we will investigate and tailor the SWNT/polymer interaction in order to design and apply sensing mechanisms for ionic analytes, temperature and even light exposure. We will create purely semiconducting SWNT dispersions with established selective dispersion techniques and exchange the wrapping polymer with newly designed and synthesized polymers, namely conjugated polyelectrolytes that bind to specific cations (e.g. potassium) or are sensitive to pH changes; or with conjugated polymers with specific temperature and light-sensitive sidechains. We will investigate the electronic response of the nanotube/polymer hybrid to the presence of analytes and stimuli by Raman and fluorescence spectroscopy as well as zeta-potential measurements. As semiconducting nanotubes exhibit very high charge carrier mobilities in thin films it will be possible to convert the analyte-polymer-SWNT interaction directly into an electrical signal with the nanotubes as an efficient transducer in water-gated field-effect transistors as sensors. The combination of spectroscopic and charge transport data will give direct insight into the electronic interactions of semiconducting SWNTs and functionalized conjugated polymers depending on their environment.