Fabrication of zinc oxide nanorods

Li, J.Y; Chen, X.L; Li, H; He, Meng; Qiao, Zhiyu

doi:10.1016/s0022-0248(01)01509-3

Cited by 120 publications

(57 citation statements)

References 10 publications

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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.…”

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

129

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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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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

129

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show abstract

“…In recent years, one-dimensional (1D) nanostructures such as nanotubes [1], nanowires [2], nanorods [3], nanobelts [4], nanocables [5], and nanoribbons [6] have stimulated a considerable interest for scientific research due to their importance in fundamental physics studies and their potential applications in nanoelectronics, nanomechanics and flat panel displays. 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.…”

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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“…Several pathways have been developed and used to produce crystalline nanowires in different materials systems and in large quantities, including physical vapor deposition (Huang et al 2001, Kong et al 2001Omari et al 2008), electrochemical deposition (Kouklin et al 2001;Kouklin et al 2002;Wang et al 2002), metalorganic chemical vapor deposition (Li et al 2001), and Vapor-Liquid-Solid (VLS) growth methods (Wu and Liu 2002). The VLS pathway provides many technological advantages such as fast growth rates, low probability/ number of the extended defects such as dislocations, the possibility of diameter, and length control of the resultant nanowires.…”

Section: Vls Fabrication and Structural Characteristics Of Cu:zno Nanmentioning

confidence: 99%

Transition Metal-Doped ZnO Nanowires: En Route Towards Multi-colour Light Sensing and Emission Applications

Kouklin¹,

Omari²,

Gupta³

2010

Nanowires Science and Technology

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368and strength of the chemical bonds of wide-band gap semiconductors, photodetectors engineered based on most of metal-oxides can withstand highly elevated T and hostile environments. Despite the fact that carrier mobilities are much smaller in cases of metal oxides compared with those of many conventional semiconductors, owing to the drastically increased dielectric strength of metal oxides, much larger carrier velocities can be readily achieved by applying much higher electric fields/device biases. The property remains critical for reducing the photogenerated carrier transit time and thus improving gain characteristics of the photodetectors. Advances in nanofabrication methodologies now allow growing many metal-oxide nanowires, including in ZnO as dislocation-free, highly faceted single crystals, which according to the above-made discussion show significant promise for diverse nanophotodetector device as well as light-emission applications. At the same time, compared to cSi, ZnO nanowires typically exhibit a very limited intrinsic sensitivity to visible and infrared radiation, whereas the sensitivity to short-wavelength photons also tends to be reduced as a result of their small diameter and relative increase in the number of the surface defect states. In this chapter, we provide a brief review on the progress in engineering highresponsitivity ZnO nanowire photodetectors operating in an extended, i.e., ultravioletvisible spectral range. Particular attention is paid to the use and role of transition metal dopants to enhance the light sensitivity of ZnO nanowires/nanorods grown by seeded vapor-transport methods. Detailed consideration is given to several key aspects pertaining to the transport, photoconduction, and time-response characteristics of two-terminal metalsemiconductor-metal nano-photodetectors operating at both pre-avalanche and avalanche regimes. This review might be important to scientists working in with high-sensitivity and multispectral oxide-based nano-photodetectors, optical switches, and sensors.

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Fabrication of zinc oxide nanorods

Cited by 120 publications

References 10 publications

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

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

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

Transition Metal-Doped ZnO Nanowires: En Route Towards Multi-colour Light Sensing and Emission Applications

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