scholarly journals Rapid Hydrothermal Synthesis of Zinc Oxide Nanowires by Annealing Methods on Seed Layers

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Jang Bo Shim ◽  
Hyuk Chang ◽  
Sung-O Kim

Well-aligned zinc oxide (ZnO) nanowire arrays were successfully synthesized on a glass substrate using the rapid microwave heating process. The ZnO seed layers were produced by spinning the precursor solutions onto the substrate. Among coatings, the ZnO seed layers were annealed at 100°C for 5 minutes to ensure particle adhesion to the glass surface in air, nitrogen, and vacuum atmospheres. The annealing treatment of the ZnO seed layer was most important for achieving the high quality of ZnO nanowire arrays as ZnO seed nanoparticles of larger than 30 nm in diameter evolve into ZnO nanowire arrays. Transmission electron microscopy analysis revealed a single-crystalline lattice of the ZnO nanowires. Because of their low power (140 W), low operating temperatures (90°C), easy fabrication (variable microwave sintering system), and low cost (90% cost reduction compared with gas condensation methods), high quality ZnO nanowires created with the rapid microwave heating process show great promise for use in flexible solar cells and flexible display devices.

Nanoscale ◽  
2017 ◽  
Vol 9 (40) ◽  
pp. 15371-15378 ◽  
Author(s):  
Prashant Sharma ◽  
Hyun Ah Cho ◽  
Jae-Won Lee ◽  
Woo Seung Ham ◽  
Bum Chul Park ◽  
...  

Fan-shaped ZnO nanowire arrays can mediate intracellular delivery of non-covalently associated peptides and DNA.


2016 ◽  
Vol 18 (24) ◽  
pp. 16377-16385 ◽  
Author(s):  
Yuan Zhang ◽  
Hong-Liang Lu ◽  
Tao Wang ◽  
Qing-Hua Ren ◽  
Hong-Yan Chen ◽  
...  

The ultraviolet emission of ZnO nanowires was enhanced significantly after coating with thin ZrO2 layers and thermal annealing.


2016 ◽  
Vol 27 (43) ◽  
pp. 435402 ◽  
Author(s):  
Guangxia Cao ◽  
Kunquan Hong ◽  
Wenda Wang ◽  
Liqing Liu ◽  
Mingxiang Xu

2011 ◽  
Vol 335-336 ◽  
pp. 519-522 ◽  
Author(s):  
Sheng Liu ◽  
Wei Guang Yang ◽  
Zhe Hu ◽  
Ya Li Wang ◽  
Ke Tang ◽  
...  

Due to its suitable band gap, low cost, environmental friendliness, and high electron mobility, ZnO, naturally n-type semiconductor with a wide bandgap (Eg = 3.37 eV), is widely studied, as a window layer of heterojunction solar cells. In this study, the ZnO nanowire arrays were grown on the different ZnO seed layers by hydrothermal method. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and UV-Vis spectra were used to characterize the ZnO nanowire arrays. The results indicate the seed layer can effect the size distribution, density, crystal structure and optical properties of the nanowire arrays.


2020 ◽  
Vol 11 ◽  
pp. 117959722094143
Author(s):  
Dilshan Sooriyaarachchi ◽  
Shahrima Maharubin ◽  
George Z Tan

The integration of nanomaterials in microfluidic devices has emerged as a new research paradigm. Microfluidic devices composed of ZnO nanowires have been developed for the collection of urine extracellular vesicles (EVs) at high efficiency and in situ extraction of various microRNAs (miRNAs). The devices can be used for diagnosing various diseases, including kidney diseases and cancers. A major research need for developing micro total analysis systems is to enhance extraction efficiency. This article presents a novel fabrication method for a herringbone-patterned microfluidic device anchored with ZnO nanowire arrays. The substrates with herringbone patterns were created by maskless photolithography. The ZnO nanowire arrays were grown on the substrates by chemical bathing. The patterned design was to introduce turbulent flows as opposed to laminar flow in traditional devices to increase the mixing and contact of the urine sample with ZnO nanowires. The device showed reduced flow rates compared with conventional planar microfluidic channels and successfully extracted urine EV-encapsulated miRNAs.


RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 16678-16683 ◽  
Author(s):  
Xiaohui Kang ◽  
Chunyang Jia ◽  
Zhongquan Wan ◽  
Jia Zhuang ◽  
Juan Feng

A novel tri-layered ZnO nanostructure, consisting of ZnO nanowires as the underlayer, small ZnO hierarchical microspheres as the interlayer and large ZnO hierarchical microspheres as the overlayer, was designed and studied as a photoanode for dye-sensitized solar cells.


2011 ◽  
Vol 21 (4) ◽  
pp. 137-146
Author(s):  
Tran Van Khai ◽  
Maneeratanasarn Prachuporn ◽  
Bong-Geun Choi ◽  
Hyoun-Woo Kim ◽  
Dae-Sup So ◽  
...  

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