Synthesis, growth mechanism and effect of sputtering pressure on 3D ZnO nanostructures with trunk-branch nanorods

2019 ◽  
Vol 12 (06) ◽  
pp. 1940003 ◽  
Author(s):  
Yangsi Liu ◽  
Wei Gao
Keyword(s):  
Growth Mechanism ◽  
Zno Nanorods ◽  
Three Dimensional ◽  
Zno Nanostructures ◽  
Seed Crystals ◽  
Glass Substrates ◽  
Growth Method ◽  
Step Growth ◽  
Sputtering Pressure ◽  
Microscopic Techniques

Three-dimensional (3D) ZnO nanostructures, hierarchical nanorods with trunks and branches, were synthesized via a multi-step growth method. The ZnO trunk-branch nanorods are immobilized on glass substrates and their fabrication technologies include the deposition of ZnO seed crystals by magnetron sputtering and the hydrothermal growth of ZnO nanorods without any directing agents. The sputtering pressure for the deposition of ZnO seed crystals was varied and the corresponding effect on the morphology and microstructure of 3D ZnO nanostructures was characterized by various spectroscopic and microscopic techniques. The growth mechanism of ZnO trunk-branch nanorods was discussed and their optical property was also explored. The multi-level constructions of ZnO nanorods would benefit their photo-related functional applications.

Roughness effect for tunable wetting surfaces on metallic substrate

2016 ◽  
Vol 232 (5) ◽  
pp. 787-796 ◽  
Author(s):  
Xiuqing Hao ◽  
Jian Li ◽  
Xiaolu Song ◽  
Li Wang ◽  
Liang Li
Keyword(s):  
Contact Angle ◽  
Large Scale ◽  
Zno Nanorods ◽  
Three Dimensional ◽  
Hierarchical Structures ◽  
Friction Reduction ◽  
Electrochemical Micromachining ◽  
Growth Method ◽  
Etched Surface ◽  
Controllable Fabrication

A facile process for controllable fabrication of wetting surfaces with variable hierarchical structures on metallic substrates is proposed in this study. This process, which combines the through-mask electrochemical micromachining with hydrothermal growth method, could be applied on all kinds of type and size of conductive metal. First, the anodic dissolution process is predicted using numerical simulation and experiments. The formulation of electrolyte and the etching conditions in through-mask electrochemical micromachining are optimized. Ordered microstructures and smooth etched surface in large scale are obtained using the optimized parameters. Moreover, a technology has been explored to obtain various styles of multi-level structures through an alignment system or combining with a hydrothermal method of growing ZnO nanorods. The wetting effects of the rough three-dimensional surfaces are evaluated using a contact angle system. Furthermore, the wetting and the preliminary friction reduction effects of the rough three-dimensional surfaces are evaluated using contact angle system.

Direct Electron Transfer and Electrocatalysis of Hemoglobin Adsorbed on Coralloid Gold Nanostructures

2008 ◽  
Vol 8 (7) ◽  
pp. 3439-3446 ◽  
Author(s):  
Aihua Jing ◽  
Jian Dong ◽  
Xiaoyuan Ma ◽  
Weiping Qian
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Three Dimensional ◽  
Gold Nanostructures ◽  
Electrochemical Growth ◽  
Glass Substrates ◽  
Vis Spectroscopy ◽  
Ito Glass ◽  
Growth Method ◽  
Complementary Techniques

Three-dimensional (3D) coralloid gold nanostructures (CGNs) have been fabricated by using an electrochemical growth method on the ITO glass substrates coated with agarose gel. Characterization by a variety of complementary techniques including scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-vis spectroscopy confirmed the distribution of CGNs on the ITO glass substrates. The adsorption behaviors of hemoglobin (Hb) on the CGNs-modified ITO (CGNs/ITO) electrodes were investigated by UV-vis spectroscopy and electrochemical methods, and the results demonstrated that 3D CGNs could provide good microenvironment for loading biomolecules and retaining their biological activity. Direct electron transfer of the adsorbed Hb exhibited a couple of stable and well-defined redox peaks centered at about −0.121 V and −0.041 V (vs. SCE) in 0.1 mol L−1 pH 7.0 PBS. The electron transfer rate constant is 0.78 s−1 at a scan rate of 0.1 V s−1. The adsorbed Hb in the CGNs displayed a rapid amperometric response to the reduction of hydrogen peroxide (H2O2) for a broad linear range from 1.0 × 10−6 mol L−1 to 5.0 × 10−3 mol L−1 with the detection limit of 3.0 × 10−7 mol L−1 (S/N = 3).

Progress on one-dimensional zinc oxide nanomaterials based photonic devices

Nanophotonics ◽  
2012 ◽  
Vol 1 (1) ◽  
pp. 99-115 ◽  
Author(s):  
Magnus Willander ◽  
Muhammad Q. Israr ◽  
Jamil R. Sadaf ◽  
Omer Nur
Keyword(s):  
Zno Nanorods ◽  
Three Dimensional ◽  
Incident Beam ◽  
Photonic Devices ◽  
Stimulated Emission ◽  
Zno Nanostructures ◽  
Time Resolved ◽  
One Dimensional ◽  
Optical Modes ◽  
Photoluminescence Studies

AbstractOne-dimensional nanostructures hold the most attractive and excellent physiochemical characteristics which exhibit the paramount influence on the fundamental and technological nanoelectronic as well as nanophotonic applications. In this review article, we present a detailed introduction to the diverse synthetic procedures which can be utilized for the fabrication of single-, planar- and three-dimensional ZnO nanostructures. More specifically, a thorough discussion regarding luminescence characteristics of the one-dimensional ZnO nanostructures is presented for ultraviolet and visible regions. We summarize the room temperature spontaneous emission and stimulated emission along with the interaction of the incident beam with material cavity to produce resonant optical modes and low-temperature time resolved photoluminescence studies. The most recent published results on the white light emitting diodes fabricated with the combination of ZnO nanotubes with p-GaN and ZnO nanorods with p-organic polymers on glass and disposable paper are discussed. Additionally, the significant results on optically and electrically pumped lasers are discussed; along with an overview on the future of ZnO nanostructures based photonic devices.

CVD Grown Zinc Based Nanostructures on Zinc Selenide Microscale Grains

2007 ◽  
Vol 121-123 ◽  
pp. 347-350
Author(s):  
W.C.H. Choy ◽  
C.F. Guo ◽  
K.H. Pang ◽  
Y.P. Leung
Keyword(s):  
Single Crystal ◽  
Zinc Selenide ◽  
Growth Mechanism ◽  
Zno Nanorods ◽  
Growth Direction ◽  
Metal Catalyst ◽  
Zno Nanostructures ◽  
Random Shape ◽  
Cvd Method

With a suitable growth condition using CVD method, single crystal ZnO nanorods grow on the well-defined bounded facets of the random shape ZnSe grains using Zn and Se powders without any metal catalyst. To our best knowledge, there is no report in growing ZnO nanostructures on in-situ synthesized ZnSe. The growth direction of ZnSe nanorods on a facet of a ZnSe grain is quiet uniform. The growth mechanism of the nanostructure will be discussed. Meanwhile, the photoluminescence of the nanostructures will be investigated.

Structural and Optical Properties of ZnO Nanorods Thin Films by Solution-Growth Method

2011 ◽  
Vol 225-226 ◽  
pp. 597-600 ◽  
Author(s):  
Chu Chi Ting ◽  
Sie Ping Chang
Keyword(s):  
Thin Films ◽  
Large Scale ◽  
Low Cost ◽  
Zno Nanorods ◽  
Solution Growth ◽  
Growth Technique ◽  
Glass Substrates ◽  
Growth Method ◽  
Vertically Aligned ◽  
Solution Growth Technique

Highly c-axis-oriented ZnO nanorods thin films were obtained on silica glass substrates by a simple solution-growth technique. The most compact and vertically-aligned ZnO nanorods thin film with the thickness of ~800 nm and average hexagonal grain size of ~200 nm exhibits the average visible transmittance 85%, refractive index 1.74, and packing density 0.84. As we demonstrate here, the solution-growth technique was used to produce high-quality and dense ZnO nanorods thin films, and is an easily controlled, low-temperature, low-cost, and large-scale process for the fabrication of optical-grade thin films.

Hydrothermal synthesis of a 3D double-sided comb-like ZnO nanostructure and its growth mechanism analysis

2016 ◽  
Vol 52 (53) ◽  
pp. 8231-8234 ◽  
Author(s):  
Wenqiang Li ◽  
Shiyong Gao ◽  
Lin Li ◽  
Shujie Jiao ◽  
Hongtao Li ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Growth Mechanism ◽  
Self Assembly ◽  
Three Dimensional ◽  
Mechanism Analysis ◽  
Two Dimensional ◽  
Zno Nanostructures ◽  
One Dimensional ◽  
Zno Nanostructure ◽  
2D Nanosheets

Self-assembly of two-dimensional (2D) nanosheets and one-dimensional (1D) nanorods into three-dimensional (3D) double-sided comb-like ZnO nanostructures has been successfully performed on Si and ITO substrates.

Optical study of ZnO nanorods grown via vapour solid growth method for energy harvesting applications

2020 ◽  
Author(s):  
Vandana Nagal ◽  
Mohammad Salman Khan ◽  
Virendra Kumar ◽  
Navjyoti Boora ◽  
Zishan H. Khan ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Zno Nanorods ◽  
Optical Study ◽  
Growth Method

scholarly journals Influence of Growth Temperature of the Nucleation Layer on the Growth of InP on Si (001)

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 823
Author(s):  
Shizheng Yang ◽  
Hongliang Lv ◽  
Likun Ai ◽  
Fangkun Tian ◽  
Silu Yan ◽  
...  
Keyword(s):  
Growth Temperature ◽  
Wafer Level ◽  
X Ray Diffraction ◽  
Nucleation Layer ◽  
Force Microscopy ◽  
Gas Source ◽  
Atomic Force ◽  
Growth Method ◽  
Step Growth ◽  
Microscopy Images

InP layers grown on Si (001) were achieved by the two-step growth method using gas source molecular beam epitaxy. The effects of growth temperature of nucleation layer on InP/Si epitaxial growth were investigated systematically. Cross-section morphology, surface morphology and crystal quality were characterized by scanning electron microscope images, atomic force microscopy images, high-resolution X-ray diffraction (XRD), rocking curves and reciprocal space maps. The InP/Si interface and surface became smoother and the XRD peak intensity was stronger with the nucleation layer grown at 350 °C. The Results show that the growth temperature of InP nucleation layer can significantly affect the growth process of InP film, and the optimal temperature of InP nucleation layer is required to realize a high-quality wafer-level InP layers on Si (001).

SHAPE EVOLUTION IN ONE-DIMENSIONAL ZnO NANOSTRUCTURES GROWN FROM ZnO NANOPOWDER SOURCE: VAPOR–LIQUID–SOLID VERSUS VAPOR–SOLID GROWTH MECHANISMS

2011 ◽  
Vol 10 (01n02) ◽  
pp. 75-79 ◽  
Author(s):  
SOUMEN DHARA ◽  
P. K. GIRI
Keyword(s):  
Growth Mechanism ◽  
Growth Temperature ◽  
Shape Evolution ◽  
Zno Nanostructures ◽  
Growth Mechanisms ◽  
Vapor Liquid Solid ◽  
One Dimensional ◽  
Zno Nanopowder ◽  
Simultaneous Growth ◽  
Vapor Liquid

Here we report on the growth and evolution of ZnO nanowires grown from ZnO nanopowder as a source material using a horizontal muffle furnace. The shape evolution has been studied with variation in growth temperature and zinc vapor pressure. The structural analysis on these nanostructures shows c-axis oriented aligned growth. Scanning electron microscopy imaging of these nanostructures revealed the shape evolution from nanowires to nanoribbons and then to nanorods as the growth temperature increases from 650°C to 870°C. At 650°C, only vertical nanowires have been observed and with increase in growth temperature nanowires transform to nanoribbons and then to nanorods at 870°C. And we also observed simultaneous growth of nanorods and nanoribbons under a specific growth condition. We believe that these nanowires and nanorods were formed by vapor–liquid–solid growth mechanism (catalyst-mediated growth), whereas nanoribbons were grown by vapor–solid growth mechanism (without the aid of a metal catalyst). We observed simultaneous occurrence of vapor–liquid–solid and vapor–solid growth mechanisms at a particular growth temperature. These ZnO nanowires exhibit bound exciton related UV emission at ~379 nm, and defect-emission band in the visible region. Possible growth mechanism, shape evolution, and simultaneous growth of two types of one-dimensional ZnO nanostructures under the same growth condition are discussed.

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