Self-assembly epitaxial growth of nanorods on nanowalls in hierarchical ZnO hexagonal nanocastle
Source abstract
Abstract
Three-dimensional (3D) hierarchical por- ous nanostructure materials with controlled morphol- ogy have attracted much attention for their unique properties and wide applications. In the present work, a novel 3D hierarchical ZnO nanostructure was prepared through chemical vapor deposition, which is self-assembled by an array of vertical 1D nanorods on top of 2D nanowalls network in 3D hexagonal nanocastle. As revealed by transmission electron microscopy, the hierarchical nanostructures are com- posed of single crystal ZnO along the (0001) direction, and the preferred surfaces of nanowalls are f10 10g. Based on those experimental results, a growth mech- anism which involves a Zn-self-catalytic vapor- liquid-solid and vapor-solid mode is proposed to explain the formation of nanorods on nanowalls in 3D nanocastle. Raman and photoluminescence spectrum demonstrated that these 3D hierarchical ZnO nanostructures are nearly free of strain and exhibit an intense ultraviolet emission at 377.6 nm with negligible defect-related green bands.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Ga2O3 and related materials · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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