A simple all-solution approach to the synthesis of large ZnO nanorod networks

Soft-lithography of Zn-loaded hydrogels and a subsequent hydrothermal growth process yield self-assembling networks of bridging ZnO nanorods (NRs). They are grown on seeding micropillars of ZnO until they touch, forming junctions that provide a preferred electrical path for the operative current of functional devices (e.g. gas senors).

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Controlling the hydrothermal growth and the properties of ZnO nanorod arrays by pre-treating the seed layer

RSC Advances ◽

10.1039/c4ra05008h ◽

2014 ◽

Vol 4 (84) ◽

pp. 44452-44456 ◽

Cited By ~ 13

Author(s):

Y. Yin ◽

Y. Sun ◽

M. Yu ◽

X. Liu ◽

B. Yang ◽

...

Keyword(s):

Seed Layer ◽

Zno Nanorods ◽

Hydrothermal Growth ◽

Zno Nanorod ◽

Nanorod Arrays ◽

Zno Nanorod Arrays

Annealing or plasma pre-treating the ZnO seed layer influences the nucleation and hydrothermal growth of ZnO nanorods and their photoluminescence.

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ZnO Nanorod Arrays and Nanowires by Hydrothermal Growth

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.811 ◽

2010 ◽

Vol 123-125 ◽

pp. 811-814 ◽

Cited By ~ 3

Author(s):

Yi Su ◽

Xiao Ping Zou ◽

Xiang Min Meng ◽

Gong Qing Teng ◽

Gang Qiang Yang ◽

...

Keyword(s):

Zno Nanorods ◽

Ammonia Solution ◽

Zinc Nitrate ◽

Zinc Nitrate Hexahydrate ◽

Hydrothermal Growth ◽

Nitrate Hexahydrate ◽

Zno Nanorod ◽

Nanorod Arrays ◽

Zno Nanorod Arrays ◽

Facile Fabrication

We are reporting here on an inexpensive and facile fabrication method for ZnO nanorod arrays by hydrothermal growth at low temperature (90°C). In our experiment, ZnO nanostructures were grown on glass substrate using an equimolar (0.1M) aqueous solution of Zn(NO3)2•6H2O (zinc nitrate hexahydrate) and C6H12N4 (HMTA) as precursors solution, and using ammonia solution to controlling the pH levels. It enable easily obtained arrayed ZnO nanorods on substrate, and nanowires which grown on nanorod arrays were identified after about 1 month in the air. The growth process of nanorods and the formation mechanism of nanowires were investigated.

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The Kinetic Study of The Hydrothermal Growth of Zno Nanorod Array Films / Zno Nanostieņu Kopu Pārklājuma Hidrotermālās Augšanas Kinētikas Izpēte

Latvian Journal of Physics and Technical Sciences ◽

10.1515/lpts-2015-0025 ◽

2015 ◽

Vol 52 (5) ◽

pp. 20-27 ◽

Cited By ~ 1

Author(s):

V. Gerbreders ◽

P. Sarajevs ◽

I. Mihailova ◽

E. Tamanis

Keyword(s):

Zno Nanorods ◽

Hydrothermal Process ◽

Hexagonal Wurtzite Structure ◽

Hydrothermal Growth ◽

Solution Temperature ◽

Zno Films ◽

Nitrate Hexahydrate ◽

Zno Nanorod ◽

Nanorod Arrays ◽

Kinetics Of

Abstract The simple analysis method has been introduced for the kinetic analysis of the hydrothermal growth. The zinc oxide nanorod arrays have been synthesized via a hydrothermal process. Zinc nitrate hexahydrate (Zn(NO3)2 · 6H2O) has been used as the precursor in the presence of hexamethylenetetramine (C6H12N4) for the formation of ZnO nanostructures. Long-term isothermal growth kinetics of ZnO nanorods has been investigated. The effect of the solution temperature (70-90 ℃) on the kinetics of the hydrothermal growth of ZnO nanorods has been examined. An extensive analysis by scanning electron microscopy, energy dispersive spectroscopy and x-ray diffraction has revealed that the as-synthesized ZnO nanorod arrays are well-crystalline and possessing hexagonal wurtzite structure. These ZnO films have promising potential advantages in microelectronic and optoelectronic applications.

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Fabrication and characterization of ZnO nanorods by hydrothermal growth process for DNA detection

2014 IEEE Conference on Biomedical Engineering and Sciences (IECBES) ◽

10.1109/iecbes.2014.7047569 ◽

2014 ◽

Author(s):

K.L. Foo ◽

Wei-Wen Liu ◽

U. Hashim ◽

C.H. Voon

Keyword(s):

Growth Process ◽

Dna Detection ◽

Zno Nanorods ◽

Hydrothermal Growth ◽

Fabrication And Characterization

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Rapid Hydrothermal Growth of ZnO Nanorods on a Magnetron Sputtered Thick ZnO Seed Layer

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.815.9 ◽

2019 ◽

Vol 815 ◽

pp. 9-14

Author(s):

Jun Jie Liu ◽

Ming Quan Liu ◽

Yan Yi Liu ◽

Nuo Yuan Wang ◽

Geng Zhe Shen ◽

...

Keyword(s):

Seed Layer ◽

Water Solution ◽

Pure Water ◽

Critical Role ◽

Zno Nanorods ◽

Hydrothermal Growth ◽

Zno Nanorod ◽

Average Growth ◽

Growth Solution ◽

Magnetic Sputtering

In this work, we report rapid hydrothermal growth of ZnO nanorods on a magnetron sputtered thick ZnO seed layer. The ZnO seed layer on the glass substrarte is monocrystalline and formed by 600 °C annealing for 1 hour after magnetic sputtering. The morphology of the ZnO grain in the ZnO seed layer plays a critical role in the growing of the ZnO nanorods, and the slant ZnO grain results in the slant ZnO nanorod and connected ZnO nonrods. It is found that the average growth of the ZnO nanorods is ~75 nm/minute. The rapid grow rate may be owing to the monocrystallie and the pure water solution of the growth solution.

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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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EFFECT OF PRE-HEATING AND SEED LAYER ON HYDROTHERMAL GROWTH AND OPTICAL PROPERTIES OF ZINC OXIDE NANORODS

International Journal of Nanoscience ◽

10.1142/s0219581x11009283 ◽

2011 ◽

Vol 10 (04n05) ◽

pp. 845-849

Author(s):

GAURAV SHUKLA ◽

ALIKA KHARE

Keyword(s):

Optical Properties ◽

Seed Layer ◽

Zno Nanorods ◽

Pulsed Laser ◽

Heating Time ◽

Hydrothermal Growth ◽

Zinc Oxide Nanorods ◽

Growth Time ◽

Oxide Nanorods ◽

Reported Effect

Hydrothermal growth of highly c-axis oriented ZnO nanorods with high aspect ratio on pulsed laser deposited ZnO seed layer is reported. Effect of pre-heating time, growth time and seed layer on the structural, morphological and optical properties of ZnO nanorods is presented. The possible growth mechanism for ZnO nanorods is also discussed.

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