Alternating Current‐Driven Oxide Powder Electroluminescent Device Employing Vertically Aligned ZnO Nanowire Array

2019 ◽  
Vol 13 (12) ◽  
pp. 1900443
Author(s):  
Siwei Ma ◽  
Sirui Tan ◽  
Adrian H. Kitai
Keyword(s):  
Nanowire Array ◽  
Alternating Current ◽  
Oxide Powder ◽  
Zno Nanowire ◽  
Electroluminescent Device ◽  
Vertically Aligned

scholarly journals Thermal Evaporation Synthesis of Vertically Aligned Zn2SnO4/ZnO Radial Heterostructured Nanowire Arrays

2021 ◽  
Author(s):  
Gill Sang Han ◽  
Min Je Kang ◽  
Yoo Jae Jeong ◽  
Sangwook Lee ◽  
In Sun Cho
Keyword(s):  
Electron Microscopy ◽  
Charge Transport ◽  
Transport Properties ◽  
Powder Mixture ◽  
Thermal Evaporation ◽  
Nanowire Array ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Post Annealing ◽  
Vertically Aligned

Abstract The construction of a heterostructured nanowire array allows the manipulation of the interfacial, surface, charge transport, and transfer properties simultaneously, offering new opportunities to achieve multi-functionality for various applications. Herein, we developed a facile thermal evaporation and post-annealing method to synthesize ternary-Zn2SnO4/binary-ZnO radially heterostructured nanowire arrays (HNA). Vertically aligned ZnO nanowire arrays (3.5 μm in length) were grown on a ZnO-nanoparticle-seeded fluorine-doped tin oxide substrate by a hydrothermal method. Subsequently, the amorphous layer consisting of Zn-Sn-O complex was uniformly deposited on the surface of the ZnO nanowires via the thermal evaporation of the Zn and Sn powder mixture in vacuum, followed by post-annealing at 550 °C in air to oxidize and crystallize the Zn2SnO4 shell layer. The use of a powder mixture composed of elemental Zn and Sn (rather than oxides and carbon mixture) as an evaporation source ensures high vapor pressure at a low temperature (e.g., 700 °C) during thermal evaporation. The morphology, microstructure, and charge-transport properties of the Zn2SnO4/ZnO HNA were investigated by scanning electron microscopy, X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and electrochemical impedance spectroscopy. Notably, the optimally synthesized Zn2SnO4/ZnO HNA shows an intimate interface, high surface roughness, and superior charge-separation and -transport properties compared with the pristine ZnO nanowire array.

The Growth Mechanism of Vertically Aligned ZnO Nanowire Arrays on Non-epitaxial Si(100) Substrates

2011 ◽  
Vol 58 (6) ◽  
pp. 817-821 ◽  
Author(s):  
Yu-Tung Yin ◽  
Yen-Zhi Chen ◽  
Ching-Hsiang Chen ◽  
Liang-Yih Chen
Keyword(s):  
Growth Mechanism ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Zno Nanowire Arrays ◽  
Vertically Aligned

Synthesis of Self-Supporting ZnO Nanowire Array Film and its Optical Property and Room Temperature Ferromagnetism

2021 ◽  
Vol 1036 ◽  
pp. 45-52
Author(s):  
Jiao Yang ◽  
Xin Yu Wang ◽  
Peng Kai Li ◽  
Ji Fa Huang ◽  
Peng Hao Deng
Keyword(s):  
Exposure Time ◽  
Room Temperature ◽  
Surface Defects ◽  
Room Temperature Ferromagnetism ◽  
Nanowire Array ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Vertical Orientation ◽  
Vibration Sample Magnetometer ◽  
The Relationship

X-ray diffractometer, field emission scanning electron microscope (SEM, Hitachi S-4800), laser confocal micro-region Raman spectrometer and vibration sample magnetometer were used to systematically study the effects of polyethyleneimine concentrations and exposure time on the morphology and size of ZnO nanowire arrays. The photoelectric property and the relationship between the morphology of nanowire arrays and ferromagnetism at room temperature were also analyzed. Under 15 min exposure time, when the polyethyleneimine concentration is 2.25 g / L, the obtained ZnO nanowire array film exhibits the smallest size, the optimal density and vertical orientation. According to the study of luminescence and room temperature magnetism, it is shown that the optical and ferromagnetic property are related to the variation tendency of oxygen defects and surface defects of the ZnO nanowires.

Characterization of a vertically aligned silica nanospring-based sensor by alternating current impedance spectroscopy

2010 ◽  
Vol 20 (9) ◽  
pp. 095005 ◽  
Author(s):  
Yukta P Timalsina ◽  
Dennis Oriero ◽  
Timothy Cantrell ◽  
Tej Prakash ◽  
Joshua Branen ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Alternating Current ◽  
Vertically Aligned
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