Controllable synthesis of periodic flower-like ZnO nanostructures on Si subwavelength grating structures

Abstract

We report on the periodic well-defined flower-like zinc oxide (ZnO) nanostructures (NSs) self-assembled through a simple hydrothermal method using silicon (Si) subwavelength grating (SWG) structures. The Si SWGs serve as building blocks for constructing a two-dimensional (2D) periodic architecture to integrate the one-dimensional (1D) ZnO NSs. Various controlled morphologies of ZnO NSs with high crystallinity are obtained by changing the growth conditions. For 1D ZnO NSs integrated on periodic hexagonal Si SWG structures, the reflection characteristics are investigated in comparison with the conventional ZnO nanorod (NR) arrays. For a three-dimensional (3D) flower-like ZnO NS on Si SWGs, a relatively low total reflectance of < 8% at wavelengths of 300-1050 nm is achieved compared to the ZnO NRs on Si substrate.

Structural and optical properties of ZnO nanorods by electrochemical growth using multi-walled carbon nanotube-composed seed layers

“…Among many fabrication approaches, a hydrothermal or electrochemical deposition method has been considered as an efficient way to grow ZnO nanostructures since it is a simple, low-temperature, large-scale, and cost-effective process [4,5]. In order to grow high-quality ZnO nanostructures in such chemical synthesis methods, the seed layer is very important because the orientation and crystallinity of ZnO nanostructures depend on the conditions of the underlying seed layer [6].…”

Self-assembled dendrite Ag arrays with tunable morphologies for surface-enhanced Raman scattering

“…In recent years, there has been more extensive researches focusing on fabrication of high reproducibility and high efficiency Ag SERS substrates, including Ag nano-particles, core-shell particles, nanowires, nanorings nanotetrapods, nanocombs [10], thin films and nanoflowers etc.…”

Effect of AZO film as seeding substrate on the electrodeposition and properties of Al-doped ZnO nanorod arrays

“…Generally, the physical properties of ZnO nanorod arrays (ZnO NRAs) are strongly affected by their morphology in terms of shape, surface density, size, and vertical alignment besides doping [7]. A proper design of ZnO nanostructures could result in improved performance in sensors, transducers or solar cells [8].…”