Study On Electrical Transport Properties Of UV-Sensitive TiO₂ Nanotube

Titanium dioxide (TiO₂), as an important wide band gap semiconductormaterial, has been widely used in fields like photocatalysis, the degradationprocessing of pollutants and solar cell, et al. The TiO₂ nanomaterial includingnanoparticles, nanowires, nanotubes, etc., have gradually become a research focusbecause of their outstanding physical and chemical properties. TiO₂ nanotubesespecially attract more and more attention of the scientific community due to theirown unique structure and excellent performance.One-dimensional nano-material such as nanowires, nanotubes, nanofibers, etc.,shows great prospect in the fabrication of low-dimensional nanodevice because oftheir unique structure and novel properties. The current scientific research on TiO₂nanotubes are mainly concentrated in the building methods of nanotube arraystructure, UV-sensitive properties of thin films and its application in photocatalyticdegradation and solar cell, while the electrical transport properties of single TiO₂nanotube is rarely found in the Journal. In our current viewpoint, to study theelectrical transport properties of single TiO₂ nanotube is vital for understanding theapplication mechanism of TiO₂ for use in solar cell and other related fields.In this paper, we did some experimental study and theoretical analysis to theelectrical transport properties of TiO₂ nanotubes from a different point of view. Themain contents are as follows:1) We systematically introduced the current research progress of nanomaterialand nanotubes at home and abroad, and we made a simplereview of the research situation of electrical transport properties ofsome major one-dimensional nano-material;2) We described in detail the method of dispersing single TiO₂ nanotubefrom the TiO₂ nanotube arrays, and we got a single independent TiO₂nanotube. Finally, a "four-probe" structure on a single TiO₂ nanotubewas successfully prepared by electron beam lithography (EBL), focusedion beam (FIB) and other semiconductor process.3) We made some contrastively experimental study of TiO₂ nanotube arrayfilm and single TiO₂ nanotube sensitivity to UV and humidity, and wedid a simple analysis of its mechanism of photosensitive and humiditysensitive.4) Using PPMS (Physical Property Measurement System), we studied theresistance characteristics and I-V characteristics of the single TiO₂nanotube, focusing on the resistance and I-V characteristics'variation with temperature of the single TiO₂ nanotube. We made a simpleanalysis of the mechanism.