Anisotropic epitaxial ZnO/CdO core/shell heterostructure nanorods

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 nanorod-based 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.

Design and tailoring of patterned ZnO nanostructures for energy conversion applications

“…Several strategies have been proposed to fabricate highly ordered ZnO NAs, such as nanosphere lithography (NSL) [64][65][66][67][68], electron beam lithography (EBL) [69][70][71][72], optical lithography (OL), and laser interference lithography (LIL) techniques [73][74][75][76][77][78][79][80]. Among these, self-assembled NSL is a simple and economical technique, which employs twodimensional (2D) self-assembled nanometer-sized polystyrene spheres as lithography masks to fabricate patterned arrays [64].…”

Microstructure-Dependent Visible-Light Driven Photoactivity of Sputtering-Assisted Synthesis of Sulfide-Based Visible-Light Sensitizer onto ZnO Nanorods

“…Advancements have been substantial in the design and understanding of the physical properties of low-dimensional semiconductor heterostructures [ 1 , 2 ]. Low-dimensional semiconductor heterostructures, because of their special band alignment at the interfaces, have potential applications in photoactivated and gas-sensing devices [ 3 , 4 ].…”

Structure-dependent gas detection ability of clustered ZnS crystallites with heterostructure and tube-like architecture

“…One-dimensional semiconductors with a three-dimensional architecture exhibit a high surface-to-volume ratio and excellent physical and chemical properties [2,6]. Experimental results have revealed that combining two wide band gap semiconductors can yield a novel material featuring improved functions compared with the individual semiconductor material [10][11][12]. In addition to heterostructures, 1D materials with a porous structure or a tube-like morphology have been demonstrated to exhibit superior gas sensing response and sensitivity [13,14].…”