Electrical Activity and Extremes of Individual Suspended ZnO Nanowires for 3D Nanoelectronic Applications

作者：Aristide Djoulde, Mengfan He, Xinyue Liu, Lingdi Kong, Pengfei Zhao, Jinjun Rao, Jinbo Chen, Lingjun Meng, Zhiming Wang, Mei Liu · 发表于：ACS Applied Materials & Interfaces · 年份：2023 · DOI：10.1021/acsami.3c07418 · 被引用次数：7 · 研究领域：ZnO doping and properties、Ga2O3 and related materials、Transition Metal Oxide Nanomaterials

We explored the electrical activity and extremes inside individual suspended zinc oxide (ZnO) nanowires (NWs) (diameter: 50–550 nm, length: 5–50 μm) subjected to high forward bias-induced Joule heating using two-terminal current–voltage measurements. NWs were isolated using a reproducible nanometrology technique, employing a nanomanipulator inside a scanning electron microscope. Schottky behavior is observed between installed tips and ZnO NW. The suspended ZnO NWs exhibited an average electrical resistivity ρ (approximately 2.3 × 10 –2 Ω cm) and a high electron density n (exceeding 1.89 × 10 18 cm –3 ), comparable to that of InP NWs, GaN NWs, and InAs NWs (10 18 ∼10 19 cm –3 ), suggesting the potential to drive advancements in high-performance NW devices. A maximum breakdown current density ( J BD ) of ∼0.14 MA/cm 2 and a maximum breakdown power density ( P BD ) of 6.93 mW/μm 3 were obtained, both of which are higher than substrate-bound ZnO NWs and consistent with previously reported results obtained from probed ZnO NWs grown vertically on the substrate. Moreover, we discovered that NWs experienced thermal breakdown due to Joule heating and exploited this breakdown mechanism to further investigate the temperature distribution along the ZnO NWs, as well as its dependence on the electrical properties and thermal conductance of contact electrodes. Thermal conductance was determined to be ∼0.4 nW K –1 and ∼1.66 pW K –1 at the tungsten(W)-ZnO NW and platinum(Pt)-ZnO NW contacts, ...