Synthesis of ZnO nanotubes and nanotube-nanorod hybrid hexagonal networks using a hexagonally close-packed colloidal monolayer template

Pyun, Yong Bum; Yi, Jaeseok; Lee, Dong Hoon; Son, Kwang Soo; Liu, Guanchen; Yi, Dong Kee; Paik, Ungyu; Park, Won Il

doi:10.1039/c0jm00011f

Cited by 19 publications

(14 citation statements)

References 35 publications

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“…, which showed the abrupt change in intensity and peak position across nanotubes and rod junctions. The blueshift of CL peaks from the nanotube region was attributed to a quantum confinement effect originating from the very thin ZnO tube walls . To quantitatively evaluate our results in the context of a quantum confinement effect, we compared our measurements to calculations based on an effective mass model.…”

Section: Resultsmentioning

confidence: 99%

Large‐Scale Synthesis of Vertically Aligned ZnO Hexagonal Nanotube‐Rod Hybrids Using a Two‐Step Growth Method

Kim

Kwon

et al. 2013

J. Am. Ceram. Soc.

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Zn-polar (0001) surfaces are more chemically reactive than other surfaces of ZnO crystals and drive preferential anisotropic and asymmetric growth along the [0001] direction, which facilitates growth of c-axis oriented, one-dimensional ZnO nanostructures. Accordingly, capping the top (0001) surface of ZnO crystals can impede c-axis growth and thus serve to modulate growth habits. In this study, we generated vertically aligned ZnO hexagonal nanotube-rod (h-NTR) hybrids by modulating growth habits during a second-stage process. Electron microscopy studies revealed the formation of very thin (10-20 nm) single-crystalline nanotube walls along the edges of underlying hexagonal rod tops capped with Si. In addition, spatially resolved investigation of ZnO h-NTR indicated an abrupt increase in the measured bandgap across rod-tube junctions, which was ascribed to a quantum confinement effect and Burstein-Moss effect of carriers within the very thin nanotube walls.

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Section: Resultsmentioning

confidence: 99%

Large‐Scale Synthesis of Vertically Aligned ZnO Hexagonal Nanotube‐Rod Hybrids Using a Two‐Step Growth Method

Kim

Kwon

et al. 2013

J. Am. Ceram. Soc.

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“…2(a)) reveals the presence of ZnO nanotubes (mean diameter ∼40 ± 20 nm), as the result of a hindered growth process due to the confining effect of PS mask during the CBD growth. 17 On the contrary, the external ZnO nanorods (mean diameter ∼100 ± 30 nm) are characterised by a higher density, better defined geometry and variable length according to the CBD growth parameters. 15 16 From the SEM cross section (Fig.…”

Section: Resultsmentioning

confidence: 99%

Integration of Metal Organic Chemical Vapour Deposition and Wet Chemical Techniques to Obtain Highly Ordered Porous ZnO Nanoplatforms

Fragalà¹,

Aleeva²,

Satriano³

2011

J. Nanosci. Nanotech.

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Large-area, highly ordered ZnO micropores-arrays consisting of ZnO nanotubes delimited by ZnO nanorods have been successfully fabricated and tested for protein sensing applications. ZnO seed layers have been deposited by Metal Organic Chemical Vapour Deposition and readily patterned by Colloidal Lithography to attain ZnO nanorods growth at selective sites by Chemical Bath Deposition. The used synthetic approach has been proven effective for the easy assembly of ZnO nanoplatforms into high-density arrays. Both patterned and unpatterned ZnO nanorods have been morphologically and compositionally characterised and, thus, tested for model studies of protein mobility at the interface. The patterned layers, having a higher contribution of surface polar moieties than the corresponding unpatterned surfaces, exhibit a reduced lateral diffusion of the adsorbed protein. This evidence is related to the intrinsic porous nature of the ZnO hemispherical arrays characterised by a nanotube-nanorod hybrid networks. The present study gives a great impetus to the fabrication of tunable ZnO nanoplatforms having multiple morphologies and exceptionally high surface areas suitable for application in sensing devices.

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“…Additives to the solution, such as citrates and citric acid, can result in significant differences in the obtained morphology [123]. Use of anodized alumina template hydrothermal growth of ZnO was also reported [89], as well as the use of polystyrene colloids [113]. [85].…”

Section: Growth Methodsmentioning

confidence: 99%

Recent Progress in Hydrothermal Synthesis of Zinc Oxide Nanomaterials

Djurišić

Chen

Leung

2012

NANOTEC

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Hydrothermal synthesis is of considerable interest due to its low cost, simplicity and relatively low growth temperature (typically below 200 °C). Since the synthesis is performed in aqueous solutions (no organic solvents), it can also be safe and environmentally friendly (depending on precursor chemicals). Consequently, it has been a subject of intense research in recent years. In this article, we review recent progress in hydrothermal synthesis of zinc oxide nanomaterials, with focus on practical relevance for a variety of applications.

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Synthesis of ZnO nanotubes and nanotube-nanorod hybrid hexagonal networks using a hexagonally close-packed colloidal monolayer template

Cited by 19 publications

References 35 publications

Large‐Scale Synthesis of Vertically Aligned ZnO Hexagonal Nanotube‐Rod Hybrids Using a Two‐Step Growth Method

Large‐Scale Synthesis of Vertically Aligned ZnO Hexagonal Nanotube‐Rod Hybrids Using a Two‐Step Growth Method

Integration of Metal Organic Chemical Vapour Deposition and Wet Chemical Techniques to Obtain Highly Ordered Porous ZnO Nanoplatforms

Recent Progress in Hydrothermal Synthesis of Zinc Oxide Nanomaterials

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