Morphology-Controlled Three-Dimensional Nanoarchitectures Produced by Exploiting Vertical and In-Plane Crystallographic Orientations in Hydrothermal ZnO Crystals

Abstract

Herein we describe the morphology-controlled synthesis of three-dimensional (3D) ZnO nanoarchitectures via a facile hydrothermal route. In this approach, vertical and in-plane crystallographic orientations of ZnO crystals were tuned by appropriate patterning of growth masks and seed layer control, which enabled the formation of three types of ZnO nanoarchitectures. If polycrystalline ZnO layers with poor c-axis orientation were used as a seed, flower-like ZnO nanoarchitectures composed of radially oriented ZnO nanorods were achieved. In the case of c-axis oriented ZnO seeds, polygonal ZnO pillars grew vertically at the center of the growth holes. Even in the latter case, multidomain columnar–joint structures or single domain crystal structures with well-defined hexagonal facets were achieved based on the existence of six-fold in-plane symmetry of the ZnO seed layers. These morphology-controlled ZnO nanoarchitectures exhibited clear differences in light propagation characteristics, which could be ascribed to strong light guiding in the one-dimensional nanostructures.

Control of zinc oxide nanowire array properties with electron-beam lithography templating for photovoltaic applications

“…While previous reports of templated ZnO nanowire arrays have controlled array pitch [21][22][23][24][25], these reports did not simultaneously achieve (1) small template-hole diameter for singlenanowire growth and (2) high-resolution pitch-control for optimized charge collection. These characteristics are required to grow single nanowires at precise positions for maximum charge collection.…”

Effect of surfactant on the morphology of ZnO nanopowders and their application for photodegradation of rhodamine B

“…Scientists have made great efforts in controlling the morphology of ZnO. Previous studies on growth habits of ZnO under hydrothermal conditions have established that precursor, temperature, concentration, pH and using surfactants are all influencing factors on the resulting particle size and morphology [10][11][12][13][14].…”

Hydrothermally Synthesis Nanostructure ZnO Thin Film for Photocatalysis Application

“…The absorption coefficient is higher than 10 4 cm -1 in the visible region hence ZnO thin film is considered to be a suitable material for photovoltaic solar energy conversion. The UV-vis absorption spectrum of the synthesized nanostructure ZnO nanorod obtained a strong excitonic absorption band at 365 nm which indicate formation nanostructure ZnO thin film [31] [32].…”