Electrical conductivity in metal doped oxide nanotubes prepared with templating metal salt nanofibres

纳米管是具有高各向异性的多孔材料。这使得它们在许多应用中具有吸引力，例如作为各向异性电导体和纳米电子学的许多方面。对于这些应用，纳米管必须至少由半导体壁组成，其优选地另外掺杂有高导电材料，即金属颗粒。为了合成氧化物或硫化物纳米管，需要合适的模板，其在自组织过程中定向金属氧化物前体。为了引入可以渗透到壁中并因此增强沿着壁的电导率的第二金属，我们的方法包括使用金属盐纳米纤维作为结构导向剂。该项目将专注于合适的金属盐纳米纤维的开发，新型半导体无机纳米管的创建以及金属掺杂氧化物（例如SiO2，SnO2和TiO2）或硫化物（例如SnS2）纳米管的各向异性电子特性。单纳米管的电导率测量的电极安排将被开发。电导将作为温度，栅极电压和磁场的函数进行测量，并将开发用于解释这些复合材料中的电子跳跃的模型。

Nanotubes are porous materials with a high anisotropy. This renders them attractive for a number of applications, e.g. as anisotropic electric conductors and for many aspects of nanoelectronics. For these applications the nanotubes must consist of at least semiconducting walls, which preferentially are additionally doped with highly conductive material, i.e. metal particles. For the synthesis of oxide or sulfide nanotubes suitable templates are necessary, which orientate the metal oxide precursors in a self-organisation process. In order to introduce a second metal which can penetrate into the walls and thus enhances the electric conductivity along the walls, our approach comprises the use of metal salt nanofibers as structure-directing agents. This project will focus on the development of suitable metal salt nanofibers, the creation of new types of semiconducting inorganic nanotubes and the anisotropic electronic properties of the metal-doped oxide, e.g. SiO2, SnO2 and TiO2, or sulfide (e.g. SnS2) nanotubes. Electrode arrangements for the conductivity measurements of single nanotubes will be developed. The conductance will be measured as function of temperature, gate voltage and magnetic field and models for the interpretation of the electron hopping in these composite materials will be developed.