Orientation and actual growth mechanism of ZnO nanorods through hydrothermal method on gold seed layer

Iqbal, Younas; Mustafa, Mohd Kamarulzaki; Wang, Jianli; Wang, Chao

doi:10.1063/5.0067231

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…ZnO nanorods produced on both annealed and un annealed Cr/Au seed layer present a completely different morphology as discussed by Mustafa et al [25] and Younas et al [26]. The nanorods produced on annealed Cr/Au seed layer has better orientation then the nanorods produced on un annealed seed layer with same precursors concentration as shown in Figures 3 and 4.…”

Section: Zno Nanorods Growthmentioning

confidence: 68%

“…The initial growth of the nanorods is started on the grains produced on the annealed substrate, and further growth is proceeded by the heterogeneous nucleation in the solution. It's also possible that some of the nanorods growth took place in the fluid through homogenous nucleation, and then fall down on the seed layered substrate [26]. The increase of the nucleation sites on the annealed seed layer improves the alignment and orientation of the nanorods.…”

Section: Internal Mechanism Of Zno Nanorods Growth and Orientationmentioning

confidence: 99%

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Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Iqbal¹,

Mustafa²

2023

Gold Nanoparticles and Their Applications in Engineering

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ZnO has gain a great attention in many applications due to its wide band gap. Orientation and alignment of ZnO nanorods are the key objectives of fundamental applied research. They may be produced by both physical and chemical methods, however the chemical method has the advantages of low temperature and pressure conditions. The electronic properties of ZnO nanorods are more superior then the thin films. Most of the applications of ZnO nanorods depends on the morphology, orientation and interspacing among them. Seed layer on the substrate has a key role in the morphology of ZnO nanorods. In this chapter the, orientation, alignment and a clear mechanism of ZnO nanorods production in hydrothermal method is presented. The experimental results deduced that the ZnO nanorods are produced in the precursor solution and move down to the substrate through 001 face stab between the successive grains generated through annealing of gold seed layer, and as a result an oriented and aligned array of the nanorods are formed on the substrate.

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Section: Zno Nanorods Growthmentioning

confidence: 68%

Section: Internal Mechanism Of Zno Nanorods Growth and Orientationmentioning

confidence: 99%

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Iqbal¹,

Mustafa²

2023

Gold Nanoparticles and Their Applications in Engineering

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“…Despite this effort, there still seems to be little agreement on which growth parameters are principally responsible for determining the spatial dimensions of the ZnO NRs. While some papers report that increasing the growth time results in longer and thicker hexagonal ZnO NRs [20,[26][27][28], others conversely observed that only the NR length increased without either a diameter change [29] or a modification in morphology [30]. Similar controversy in the literature exists about the use of the growth temperature to tune diameter and/or length of NRs.…”

Section: Introductionmentioning

confidence: 99%

Defect-free ZnO nanorods with high angular distribution for enhanced excitonic emission

Fiedler

Phillips

2023

Journal of Materials Research

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Low-temperature hydrothermal growth has emerged as a popular method for the fabrication of ZnO nanorods (NRs), increasing the functionality and utility of ZnO-based devices. In this work, we study the influence of growth time, temperature and seed layer on the dimensions and angular distribution of ZnO NRs. High-quality NRs with a crisscrossed 60° angular distribution have been grown with a 20–60 nm diameter and 600 nm length. We show that, within the ideal range of growth parameters, the growth time and temperature have no controllable influence on NR diameter and length, while the deposition method and size of the pre-growth deposited ZnO seeds affects diameter and NR angular alignment. We demonstrate advantages of using crisscross-aligned NRs over planar ZnO for the enhancement of ZnO excitonic emission by optical coupling with gold nanoparticles. These results can be readily adapted for applications that involve surface coating-mediated enhancement of both light emission and injection. Graphical abstract

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Fabrication and Characterization of Zinc Oxide Nanorods on Electrohydrodynamic Jet Printed Silver Micropillars

Hossain,

Kwon

2024

ACS Appl. Electron. Mater.

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The integration of three-dimensional (3D) nanostructures into optoelectronic devices offers significant potential for performance enhancement and expanded functionality. However, the advancement of 3D nanostructures has been constrained by the absence of effective fabrication techniques. This study introduces a two-step fabrication method for 3D nanostructures, combining the growth of zinc oxide (ZnO) nanorods (NRs) on silver (Ag) micropillars (MPs). The Ag MPs, which exhibit a controlled aspect ratio, were fabricated using drop-on-demand electro-hydrodynamic (DoD-EHD) printing, achieving a maximum height of 67 μm, a diameter of 2.60 μm, and an aspect ratio of ∼26. The number and spacing of the pillars can be precisely adjusted via software and motion control, underscoring the method's versatility in the production of diverse 3D structures. Subsequently, high-density ZnO nanorods (NRs) were grown on the surface of Ag micropillars (MPs) using the hydrothermal method, resulting in NRs with an average length of 5 μm and a diameter of 0.80 μm. Characterization of the resulting 3D structures demonstrated the uniform morphology, high crystallinity, and superior optical properties. The identification of a double-band regime at 3.05 eV for Ag MPs and that at 3.40 eV for ZnO NRs confirmed the successful formation of out-of-plane 3D metal-semiconductor heterojunctions, highlighting their potential for application in advanced optoelectronic devices.

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Orientation and actual growth mechanism of ZnO nanorods through hydrothermal method on gold seed layer

Cited by 5 publications

References 20 publications

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Defect-free ZnO nanorods with high angular distribution for enhanced excitonic emission

Fabrication and Characterization of Zinc Oxide Nanorods on Electrohydrodynamic Jet Printed Silver Micropillars

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