Trends for the crystallinity, optical and electrical properties of post-thermal annealed ZnO nanorods

Wong, C. K.; Lai, Lo-Ming; Leung, Siu-Ling; Roy, V. A. L.

doi:10.1016/j.mseb.2009.07.007

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…20,21) Similar PL characteristics have also been reported in other studies. 17,22) There are a few techniques that could be considered for defect passivation on the ZnO-nanorod surface. For instance, Lin et al reported that using H 2 -plasma treatment, the PL properties were improved by a factor of 60 for the relative intensity ratio (i.e., UV emission to deep-level emission).…”

Section: Resultsmentioning

confidence: 99%

Controllable Growth of Vertically Aligned Aluminum-Doped Zinc Oxide Nanorod Arrays by Sonicated Sol–Gel Immersion Method depending on Precursor Solution Volumes

Mamat

Khusaimi

Musa

et al. 2011

Jpn. J. Appl. Phys.

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Aluminium (Al)-doped zinc-oxide (ZnO) nanorod arrays have been successfully prepared using a novel and low-temperature sonicated sol–gel immersion method. The photoluminescence (PL) spectrum reveals the appearance of two emission peaks from the nanorod that are centred at 381 and 590 nm. The nanorod has a hexagonal structure with a flat-end facet, as observed using field-emission electron microscopy (FESEM). Interestingly, all samples have similar surface morphologies and diameter sizes of 40 to 150 nm after immersion in different precursor-solution volumes. The thickness-measurement results show that the thicknesses of the samples increase after immersion in higher precursor-solution volumes. We show for the first time that the growth of nanorod arrays along the c-axis can be controlled using different precursor volumes, and its growth mechanism is discussed. X-ray diffraction (XRD) spectra indicate that the prepared nanorods are ZnO with a hexagonal wurtzite structure that grows preferentially along the c-axis.

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Section: Resultsmentioning

confidence: 99%

Controllable Growth of Vertically Aligned Aluminum-Doped Zinc Oxide Nanorod Arrays by Sonicated Sol–Gel Immersion Method depending on Precursor Solution Volumes

Mamat

Khusaimi

Musa

et al. 2011

Jpn. J. Appl. Phys.

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show abstract

“…In the case of flower-like ZnO NSs, the use of 5 mM zinc nitrate concentration exhibited higher intensities in both NBE UV emission and the dominant (002) XRD peak compared to the 2 mM zinc nitrate concentration. The relatively narrow XRD peak and high PL intensity of ZnO NSs are desirable for nanodevice applications due to the improved charge transport properties [29].…”

Section: Resultsmentioning

confidence: 99%

Controllable synthesis of periodic flower-like ZnO nanostructures on Si subwavelength grating structures

Leem²,

2011

Nanotechnology

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We report on the periodic well-defined flower-like zinc oxide (ZnO) nanostructures (NSs) self-assembled through a simple hydrothermal method using silicon (Si) subwavelength grating (SWG) structures. The Si SWGs serve as building blocks for constructing a two-dimensional (2D) periodic architecture to integrate the one-dimensional (1D) ZnO NSs. Various controlled morphologies of ZnO NSs with high crystallinity are obtained by changing the growth conditions. For 1D ZnO NSs integrated on periodic hexagonal Si SWG structures, the reflection characteristics are investigated in comparison with the conventional ZnO nanorod (NR) arrays. For a three-dimensional (3D) flower-like ZnO NS on Si SWGs, a relatively low total reflectance of < 8% at wavelengths of 300-1050 nm is achieved compared to the ZnO NRs on Si substrate.

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“…The thermally oxidised substrate provides a good seed layer for the formation of nanorod arrays. In a wet chemical method, post-annealing heat treatment is often required to induce crys- [7]. However, in this work, the ZnO nanorod arrays are highly crystalline and well aligned without a post-annealing process.…”

Section: Introductionmentioning

confidence: 97%

Formation of ZnO nanorod arrays on polytetraflouroethylene (PTFE) via a seeded growth low temperature hydrothermal reaction

Tan

Razak

Ibrahim

et al. 2011

Journal of Alloys and Compounds

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Trends for the crystallinity, optical and electrical properties of post-thermal annealed ZnO nanorods

Cited by 9 publications

References 32 publications

Controllable Growth of Vertically Aligned Aluminum-Doped Zinc Oxide Nanorod Arrays by Sonicated Sol–Gel Immersion Method depending on Precursor Solution Volumes

Controllable Growth of Vertically Aligned Aluminum-Doped Zinc Oxide Nanorod Arrays by Sonicated Sol–Gel Immersion Method depending on Precursor Solution Volumes

Controllable synthesis of periodic flower-like ZnO nanostructures on Si subwavelength grating structures

Formation of ZnO nanorod arrays on polytetraflouroethylene (PTFE) via a seeded growth low temperature hydrothermal reaction

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