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，这些壁优先另外掺杂高导电性材料，即金属颗粒。对于氧化物或硫化物纳米管的合成，合适的模板是必要的，模板可以使金属氧化物前驱体在自组织过程中定向。为了引入第二种金属，这种金属可以渗透到壁中，从而提高沿壁的导电性，我们的方法包括使用金属盐纳米纤维作为结构导向剂。该项目将专注于开发合适的金属盐纳米纤维，创造新型半导体无机纳米管，以及金属掺杂氧化物（如SiO2， SnO2和TiO2）或硫化物（如SnS2）纳米管的各向异性电子特性。将开发用于单纳米管电导率测量的电极安排。电导将随温度、栅极电压和磁场的变化而变化，并建立解释这些复合材料中电子跳变的模型。

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.