Effects of H 2 O 2 treatment on the optical and structural properties of ZnO nanorods and the electrical properties of conductive polymer/ZnO-nanorod array diodes

.A series of vertically aligned ZnO nanorod-array films are grown on fluorine-doped tin oxide (F: SnO2, FTO) coated glass substrates by the solution-based chemical process. The effect of polyethyleneimine (PEI) adding in seed and growth solution on the structure, morphology, UV-Vis absorption spectra and photovoltaic properties of ZnO nanorod array films, has been analyzed. The XRD and SEM results showed that the ZnO nanorod have the hexagonal wurtzite structure with the (002) direction normal to the substrate. It was observed that with the addition of PEI in growth solution, the ZnO nanorods become smaller in diameter and longer in length i.e. greatly enhance their surface area, leading to improve dye adsorption and photovoltaic performance of DSSCs. The efficiency of ZnO nanorod-based DSSC with PEI in growth solution was on average 1.18 % for film A4, which is 84 % higher than for ZnO nanorod-based DSSC without PEI in growth solution.

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Enhanced immunofluorescence detection of a protein marker using a PAA modified ZnO nanorod array-based microfluidic device

Nanoscale ◽

10.1039/c8nr05116j ◽

2018 ◽

Vol 10 (37) ◽

pp. 17663-17670 ◽

Cited By ~ 6

Author(s):

Zhihua Wu ◽

De Zhao ◽

Chengyi Hou ◽

Lei Liu ◽

Jianhua Chen ◽

...

Keyword(s):

Microfluidic Device ◽

Zno Nanorods ◽

Nanorod Array ◽

Zno Nanorod ◽

Biomarker Detection ◽

Protein Marker ◽

Zno Nanorod Array

ZnO nanorods were obtained through a controllable microfluidic reaction in capillaries and used for biomarker detection after PAA modification.

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Effects of GaxZn1−xO nanorods on the photoelectric properties of n-ZnO nanorods/p-GaN heterojunction light-emitting diodes

RSC Advances ◽

10.1039/c7ra09250d ◽

2017 ◽

Vol 7 (78) ◽

pp. 49613-49617 ◽

Cited By ~ 4

Author(s):

Rui Li ◽

Chunyan Yu ◽

Hailiang Dong ◽

Wei Jia ◽

Tianbao Li ◽

...

Keyword(s):

Low Temperature ◽

Hydrothermal Method ◽

Light Emitting Diodes ◽

Zno Nanorods ◽

Nanorod Array ◽

Zno Nanorod ◽

Light Emitting ◽

Photoelectric Properties ◽

Doped Zno ◽

Zno Nanorod Array

A Ga-doped ZnO nanorod array has been synthesized on a p-GaN/Al2O3 substrate by a hydrothermal method at low temperature.

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Comparison of ZnO nanorod array coatings on wood and their UV prevention effects obtained by microwave-assisted hydrothermal and conventional hydrothermal synthesis

Holzforschung ◽

10.1515/hf-2014-0156 ◽

2015 ◽

Vol 69 (8) ◽

pp. 1009-1014 ◽

Cited By ~ 4

Author(s):

Yanchun Fu ◽

Wansi Fu ◽

Yongzhuang Liu ◽

Guozheng Zhang ◽

Yixing Liu ◽

...

Keyword(s):

Zno Nanorods ◽

Nanorod Array ◽

Zno Nanorod ◽

Size Distributions ◽

Sem Images ◽

Orientation Degree ◽

Microwave Assisted ◽

Zno Nanorod Array ◽

Aligned Array ◽

Wood Surfaces

AbstractZnO nanorod array coatings were successfully synthesized on wood surfaces using a conventional hydrothermal (CHT) and a microwave-assisted hydrothermal (MWHT) method. The reaction time of the MWHT method at high temperature was only 1/12th that of the CHT method. The MWHT-ZnO nanorods exhibited better crystallinity than those produced by the CHT method. The ZnO nanorod had a wurtzite crystal structure oriented along thec-axis. The MWHT nanorods with their higher (002)/(101) ratio were more conducive and improved the orientation degree of the ZnO nanorods. Field emission scanning electron microscopy (FE-SEM) images showed that the MWHT-ZnO nanorods had smaller diameters and narrower size distributions than those produced by the CHT method. However, both methods formed well-aligned array coatings that covered the wood surfaces, and the two coatings had similar UV protecting effects and inhibited discoloration.

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Growth and Characterization of [001] ZnO Nanorod Array on ITO Substrate with Electric Field Assisted Nucleation

MRS Proceedings ◽

10.1557/proc-879-z4.1 ◽

2005 ◽

Vol 879 ◽

Author(s):

Young Jung Kim ◽

Huamei Shang ◽

Guozhong Cao

Keyword(s):

Electric Field ◽

Zno Nanorods ◽

Nanorod Array ◽

Broad Emission Band ◽

Zno Nanorod ◽

Wurtzite Crystal Structure ◽

Direct Growth ◽

Zno Nanorod Array ◽

Band Spreading

AbstractThis paper reports direct growth of [001] ZnO nanorod arrays on ITO substrate from aqueous solution with electric field assisted nucleation, followed with thermal annealing. Xray diffraction analyses revealed that nanorods have wurtzite crystal structure. The diameter of ZnO nanorods was 60 ∼ 300 nm and the length was up to 2.5 μm depending on the growth condition. Photoluminescence spectra showed a broad emission band spreading from 500 to 870 nm, which suggests that ZnO nanorods have a high density of oxygen interstitials. Low and nonlinear electrical conductivity of ZnO nanorod array was observed, which was ascribed to non-ohmic contact between top electrode and ZnO nanorods and the low concentration of oxygen vacancies.

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Facile Synthesis of a Porous ZnO Nanorod Array with Enhanced Photocatalysis for Photoelectrochemical Water Splitting Application

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.17411 ◽

2020 ◽

Vol 20 (6) ◽

pp. 3512-3518

Author(s):

Saleh Khan ◽

Xiao-He Liu ◽

Xi Jiang ◽

Qing-Yun Chen

Keyword(s):

Annealing Temperature ◽

Zno Nanorods ◽

Nanorod Array ◽

Photocurrent Density ◽

Zno Nanorod ◽

Nanorod Arrays ◽

Zno Nanorod Arrays ◽

Irradiation Intensity ◽

Heat Treated ◽

Positive Effect

Highly efficient and effective porous ZnO nanorod arrays were fabricated by annealing ZnO nanorod arrays grown on a substrate using a simple hydrothermal method. The annealing had a positive effect on the nanorod morphology, structure and optical properties. The porosity was closely related to the annealing temperature. After heating at 450 °C, pores appeared on the nanorods. It was demonstrated that the porosity could be exploited to improve the visible light absorption of ZnO and reduce the bandgap from 3.11 eV to 2.99 eV. A combination of improved charge separation and transport of the heat-treated ZnO thus led to an increase in the photoelectrochemical properties. At an irradiation intensity of 100 mW/cm−2, the photocurrent density of the porous nanorod array was approximately 1.3 mA cm−2 at 1.2 V versus Ag/AgCl, which was five times higher than that of the ZnO nanorods. These results revealed the synthesis of promising porous ZnO nanorods for photoelectrochemical applications.

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