1D Metal Oxide Nanostructures Research Articles

A deterministic approach to the thermal synthesis and growth of 1D metal oxide nanostructures

The 1D metal oxide nanostructures, including nanowires, are researched for at least two decades. However, the theoretical models on their synthesis and growth mechanisms are still controversial, even for the simplest growth method, namely thermal oxidation of a metallic surface. In this paper, the relevance analysis of the growth conditions reported in the literature is conducted, followed by the developed theoretical model, which was verified by our experiment on copper oxide nanowires. The model quantitatively describes the two most applied hypotheses concerning the single- and bi-crystalline growth of copper oxide nanowires. The numerical simulations reveal the conditions for both obtained mechanisms. It is also established that for the growth of the relatively thick nanowires associated with the single crystals, the internal energy of oxygen molecules determines the mechanism of oxygen adsorption. The energy can be re-distributed at the oxygen attachment, and the molecule can desorb at the account of this energy. Furthermore, the obtained result are also useful for developing the theory on nanowire seed generation, identifying the key control factors and basic mechanisms behind the growth modes, making a step toward a deterministic, highly predictable synthesis of dense 1D copper oxide nanostructures.

Synthesis and characterization of 1d metal oxide nano-structures: Titanium dioxide nanotubes (TNTS) and zinc oxide nanobars (ZNBS)

Synthesis and characterization of 1d metal oxide nano-structures: Titanium dioxide nanotubes (TNTS) and zinc oxide nanobars (ZNBS)

Effect of Ga incorporation on morphology and defect structures evolution in VLS grown 1D In2O3 nanostructures

Fabrication of 1D metal oxide nanostructures of controlled morphology and defect structure is of immense importance for their application in optoelectronics. While the morphology of these nanostructures depends primarily on growth parameters utilized in physical deposition processes, incorporation of foreign elements or dopants not only affects their morphology, but also affects their crystallinity and defect structure, which are the most important parameters for their device applications. Herein we report on the growth of highly crystalline 1D In2O3 nanostructures through vapor-liquid-solid process at relatively low temperature, and the effect of Ga incorporation on their morphology and defect structures. Through electron microscopy, Raman spectroscopy and cathodoluminescence spectroscopy techniques, we demonstrate that incorporation of Ga in In2O3 nanostructures not only strongly affects their morphology, but also generates new defect levels in the band gap of In2O3, shifting the overall emission of the nanostructures towards visible spectral range.

Nanoscale ultraviolet photodetectors based on onedimensional metal oxide nanostructures

Among the important optoelectronic devices, ultraviolet (UV) photodetectors show wide applications in fire monitoring, biological analysis, environmental sensors, space exploration, and UV irradiation detections. Research interest has focused on the utilization of one-dimensional (1D) metal oxide nanostructures to build advanced UV photodetectors through various processes. With large surface-to-volume ratio and well-controlled morphology and composition, 1D metal oxide nanostructures are regarded as promising candidates as components for building photodetectors with excellent sensitivity, superior quantum efficiency, and fast response speed. This article reviews the latest achievements with 1D metal oxide nanostructures reported over the past five years and their applications in UV light detection. It begins with an introduction of 1D metal oxide nanostructures, and the significance, key parameters and types of photodetectors. Then we present several kinds of widely-studied 1D nanostructures and their photodetection performance, focusing on binary oxides with wide-bandgap (such as ZnO, SnO2, Ga2O3, Nb2O5, and WO3) and ternary oxides (such as Zn2SnO4, Zn2GeO4, and In2Ge2O7). Finally, the review concludes with our perspectives and outlook on future research directions in this field.

ChemInform Abstract: One‐Dimensional Metal Oxide Nanostructures for Heterogeneous Catalysis

AbstractReview: 96 refs.

One-dimensional metal oxide nanostructures for heterogeneous catalysis

Metal oxides are of paramount importance in heterogeneous catalysis as either supports or active phases. Controlled synthesis of one-dimensional (1D) metal oxide nanostructures has received enormous attention in heterogeneous catalysis due to the possibility of tailoring the properties of metal oxides by tuning their shapes, sizes, and compositions. This feature article highlights recent advances in shape controlled synthesis of 1D metal oxide nanostructures and their applications in heterogeneous catalysis, with the aim of introducing new insights into the heterogeneous catalyst design.

A facile hydrothermal route to synthesize novel Co 3O 4 nanoplates

Novel Co 3O 4 nanoplates and nanobelts were formed on a large scale by a facile and efficient hydrothermal process. The samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD). In the same experiment situation, 1D Ni(OH) 2 nanowires and ZnO irregular nanoplates were synthesized. The concentration of OH − is important to control the shape of final product. TBAB is the key reactant to form 1D nanostructure. In this report, we demonstrate the fabrication of Co 3O 4 with various morphologies (plate-, belt-, cube-, urchin-like). The method is a good way to synthesize other 1D metal oxide nanostructures.