Large-scale Sno_2 Nanowires Synthesized By Direct Sublimation Method And Their Enhanced Dielectric Responses

摘要

In this paper, we developed a direct sublimation method to synthesize large-scale rutile SnO_2 nanowires on 6H-SiC substrate using SnO_2 nanoparticles as starting material. The structural properties of these straight nanowires were investigated in detail. These nanowires grow along [121], and the average diameter and length of these nanowires are 80 nm and 5 μm, respectively. In addition, the dielectric measurement indicates that the dielectric response of the SnO_2 nanowires is significantly enhanced in the low-frequency range. It is suggested that both the rotation direction polarization (RDP) and the space charge polarization (SCP) process should be responsible for the enhancement of ε_r of these SnO_2 nanowires.