Growth of aligned ZnO nanorod arrays by catalyst-free pulsed laser deposition methods

Sun, Ye; Fuge, Gareth M.; Ashfold, Michael N. R.

doi:10.1016/j.cplett.2004.07.110

Cited by 427 publications

(261 citation statements)

References 22 publications

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“…Among various 1D nanostructural materials, Zinc oxide (ZnO) has generated great interests due to its direct wide band gap of 3.37eV at room temperature, large exciton binding energy of 60meV, and stable physical and chemical properties. Until now, different fabrication methods, such as vapor-phase transport [7][8][9], pulsed laser deposition [10], chemical vapor deposition [11,12] and electrochemical deposition [13], have been widely reported for the preparation of 1-D ZnO nanorods. According to these methods, the complex processes, sophisticated equipment and high temperatures are usually required.…”

Section: Introductionmentioning

confidence: 99%

Effective way to control the size of well-aligned ZnO nanorod arrays with two-step chemical bath deposition

Yang

Zhao

Willander

et al. 2009

Journal of Crystal Growth

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The diameter of well-aligned ZnO nanorod arrays (ZNAs) grown on Si substrates has been well controlled from 150nm to 40nm by two-step chemical bath deposition method (CBD), i.e. substrate pretreatment with spin coating to form ZnO nanoparticles seed layer and CBD growth. The effects of ZnO nanoparticles density and diameter on size and alignment of ZNAs were investigated in detail by atomic force microscope (AFM), X-ray diffraction (XRD), scan electronic microscope (SEM), transmission electron microscope (TEM) and photoluminescence (PL). The results indicate that both diameter and density of ZnO nanoparticles which were pre-coated on the substrates will influence the size and alignment of ZNAs, but the density will play a key role to determine the diameter of ZNAs when the density is higher than the value of 2.3×10 8 cm -2 . Moreover, only a strong UV peak at 385 nm appears in room temperature PL spectrum for these samples, which indicates that as-synthesized ZnO nanorods have a perfect crystallization and low density of deep level defects.

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Section: Introductionmentioning

confidence: 99%

Effective way to control the size of well-aligned ZnO nanorod arrays with two-step chemical bath deposition

Yang

Zhao

Willander

et al. 2009

Journal of Crystal Growth

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“…During the past decade, different one-dimensional ͑1D͒ ZnO nanostructures such as nanotubes, 1 nanowires, 2 nanorods, 3 nanobelts, 4 nanocables, 5 and nanoribbons, 6 have been successfully fabricated by different methods. Among the methods to prepare 1D ZnO nanorods, [7][8][9][10][11][12][13] chemical bath deposition ͑CBD͒ appears to have a huge potential for industrial synthesis due to advantages such as easy operation and low temperature fabrication. 14,15 Recently, we successfully controlled the size of well-aligned ZnO nanorod arrays ͑ZNAs͒ from 40 to 150 nm with the two-step CBD method, 16 i.e., by first spin coating the substrate with a seed layer of ZnO nanoparticles and then using the CBD growth.…”

Section: Introductionmentioning

confidence: 99%

Annealing effects on optical properties of low temperature grown ZnO nanorod arrays

Yang

Zhao

Willander

et al. 2009

Journal of Applied Physics

128

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Vertically well-aligned ZnO nanorods on Si substrates were prepared by a two-step chemical bath deposition method. The structure and optical properties of the grown ZnO nanorods were investigated by Raman and photoluminescence spectroscopy. The results showed that after an annealing treatment at around 500°C in air atmosphere, the crystal structure and optical properties became much better due to the decrease in surface defects. The resonant Raman measurements excited by 351.1 nm not only revealed that the surface defects play a significant role in the as-grown sample, which was supported by low temperature time-resolved photoluminescence measurements, but also suggested that the strong intensity increase in some Raman scatterings was due to both outgoing resonant Raman scattering effect and deep level defect scattering contribution for ZnO nanorods annealed from 500 to 700°C.

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“…나노 구조체는 열증착법(thermal evaporation method) [6], 기상-액상-고상법(vapor-liquid-solid method) [7], 기상이송법(vapor transport method) [8], 펄스 레이저 증착법(pulsed laser deposition method) [9], 화학기상증착법(chemical vapor deposition method) [10], 유기 금속 기체 성장법(metalorganic vapor-phase epitaxial growth method) [11], 수열합성법(hydrothermal method) [12] 등 다양한 방법으로 합 성되고 있다. 이런 다양한 합성법 중에서 수열합성법은 비교적 저 온에서 간단하고 쉽게 1차원 나노구조체를 합성할 수 있기 때문에 † To whom correspondence should be addressed.…”

Section: 서 론unclassified

Preparation of Zinc Oxide by Hydrothermal Precipitation Method and their Photocatalytic Characterization

Jeong¹,

Na²,

Kim³

et al. 2012

Korean Chemical Engineering Research

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− Photocatalytic zinc oxide powders were prepared from precursor zinc acetate and ammonia solution at elevated temperature, 80 o C, by hydrothermal precipitation method. The effect of operating parameters, pH of ammonia solution and concentration of zinc acetate solution, on the characteristics of zinc oxide powders were experimentally examined. Zinc oxide powders prepared at the conditions of pH 11, zinc acetate concentration of 1.0 M, precipitation temperature of 80 o C, showed smallest average particle diameter of 3 µm. SEM and XRD analysis confirmed that prepared zinc oxide has hexagonal rods structure, and Anatase type crystallinity. In addition, DRS and PL analysis showed that the zinc oxide has activity at the range of 200~400 nm of UV light. And the zinc oxide decomposed 57% of a foodcolor stamp Brilliant blue FCF for 3 hours under the UV radiation.

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Growth of aligned ZnO nanorod arrays by catalyst-free pulsed laser deposition methods

Cited by 427 publications

References 22 publications

Effective way to control the size of well-aligned ZnO nanorod arrays with two-step chemical bath deposition

Effective way to control the size of well-aligned ZnO nanorod arrays with two-step chemical bath deposition

Annealing effects on optical properties of low temperature grown ZnO nanorod arrays

Preparation of Zinc Oxide by Hydrothermal Precipitation Method and their Photocatalytic Characterization

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