Abstract
Various surface structures and polarities of one-dimensional nanostructures offer additional control in synthesizing heterostructures suitable for optoelectronic and electronic applications. In this work, we report synthesis and characterization of ZnO-CdO nanorodbased heterostructures grown on a-plane sapphire. The heterojunction formed on the sidewall surface of the nanorod shows that wurtzite ZnO {1010} planes are interfaced with rocksalt CdO {100}. This is evidently different from the heterojunction formed on the nanorod top surface, where a ZnO (0001) top plane is interfaced with a CdO (111) plane. Such anisotropic heterostructures are determined by different surface structures of the nanorods and their polarities. Revelation of such anisotropic heterojunctions will provide a clue for understanding charge transport properties in electronic and optoelectronic nanodevices.
| Original language | English |
|---|---|
| Article number | 626 |
| Journal | Nanoscale Research Letters |
| Volume | 7 |
| DOIs | |
| State | Published - 2012 |
Funding
This research was sponsored by the US Department of Energy, National Nuclear Security Administration, Office of Nonproliferation and Verification Research and Development. Use of TEM and FIB was supported by the ORNL’s Shared Research Equipment (ShaRE) User Facility, which is sponsored by the Office of Basic Energy Sciences, Scientific User Facilities Division, US Department of Energy.
Keywords
- Anisotropy
- CdO
- Heterojunction
- ZnO nanorod