Morphological Control of ZnO Nanostructures by Electrodeposition

Xu, Longya; Guo, Yonggang; Liao, Qing; Zhang, Jianping; Xu, Dongsheng

doi:10.1021/jp051007b

Cited by 397 publications

(384 citation statements)

References 33 publications

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“…Several structures have been produced using this method, such as nanosheets [39], flake-like nanostructures [40], ZnO plate structures [27,41], and ZnO nanowalls [42]. In this method, two or three electrodes are used; they are the working electrode, typically using conductive glass, such as indium tin oxide (ITO), and the second electrode is usually platinum (Pt), which serves as a counter electrode.…”

Section: Electrodepositionsmentioning

confidence: 99%

“…The third electrode is the reference electrode, such as Ag/AgCl electrode. Zinc chloride (ZnCl 2 ) [27] or Zn(NO 3 ) 2 [42] is dissolved in deionised water, as the conductivity of the above solution is low; salts such as potassium chloride (KCl) [41] are to be added to increase the conductivity of the electrolyte. A potential is applied between the electrodes that depend on the cell configuration either for two-electrode or threeelectrode cells.…”

Section: Electrodepositionsmentioning

confidence: 99%

“…Ions, such as Cl − or CH 3 COO − [41], are adsorbed (capping) preferentially on the positive polar face of the (0001) plane. This will limit the crystal growth along the c-axis and redirect the growth in the ( 101 ¯ 0 ) plane, and as a result, a platelet-like ZnO is produced [41,42,44]. It is worth noting that the substrate type has a significant effect on the morphology of the prepared ZnO structures.…”

Section: Electrodepositionsmentioning

confidence: 99%

“…Parameters such as substrate lattice mismatch between the substrate and the film will result in the modification of the ZnO structure [48]. The morphology of ZnO structures can be modified by adding salts, such as KCl and CH 3 COONH, to the electrolyte in the electrodeposit method [41]. Furthermore, the variations in the electrochemical potential also gave rise to a variety of crystal morphologies [56].…”

Section: The Crystal Structural and The Morphology Of The 2d Znomentioning

confidence: 99%

See 3 more Smart Citations

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Al-Hardan¹,

Hamid²,

RoslindaShamsudin³

et al. 2017

Optoelectronics - Advanced Device Structures

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In this chapter, we review the application of zinc oxide (ZnO) in ultraviolet (UV) sensing and emphasise on the two-dimensional (2D) ZnO structures. The synthesis of 2D ZnO structures, the morphologies, and the photoluminescence emission will be reviewed and highlighted. The performance of the UV sensors based on 2D ZnO structures is explored. The lack in the study of the 2D ZnO UV sensors might be due to the difficulties of controlling the growth of the 2D ZnO compared to the one-dimensional (1D) ZnO structures.

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Section: Electrodepositionsmentioning

confidence: 99%

Section: Electrodepositionsmentioning

confidence: 99%

Section: Electrodepositionsmentioning

confidence: 99%

Section: The Crystal Structural and The Morphology Of The 2d Znomentioning

confidence: 99%

See 2 more Smart Citations

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Al-Hardan¹,

Hamid²,

RoslindaShamsudin³

et al. 2017

Optoelectronics - Advanced Device Structures

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“…1 Several reports indicate that ZnO has high photocatalytic efficiency. [2][3][4] The semiconductor-metal nanocomposites are expected to have higher potentials in catalysis, optics, and magnetic applications. [5][6][7] Recently, Zn-ZnO nanocomposites was obtained using ZnCl 2 electrolyte by the electrodeposition method at room temperature.…”

mentioning

confidence: 99%

Optical Emissions of Zn and ZnO in Zn-ZnO Structure Synthesized by Electrodeposition with Aqueous Solution of Zinc Nitrate-6-hydrate

Lee

2008

Crystal Growth & Design

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Both hexagonal zinc and wurtzite zinc oxide were deposited on p-type silicon substrate by the electrodeposition with an aqueous solution of zinc nitrate-6-hydrate near room temperature. Zinc dominates the growth at higher current density, and zinc oxide dominates the growth at higher deposition temperature. The optical emission from zinc and zinc oxide nanostructures are observed from microphotoluminescence spectra.Zinc oxide (ZnO) with wide direct band gap of 3.37 eV and high excitonic binding energy of 60 mV is a promising material for optoelectronic applications. It can perform ultraviolet (UV) emission at room temperature (RT). 1 Several reports indicate that ZnO has high photocatalytic efficiency. [2][3][4] The semiconductor-metal nanocomposites are expected to have higher potentials in catalysis, optics, and magnetic applications. [5][6][7] Recently, Zn-ZnO nanocomposites was obtained using ZnCl 2 electrolyte by the electrodeposition method at room temperature. 8 The electrodeposition method is an efficient way to prepare ZnO films at low temperature. 2 The shape and size of ZnO can be modulated by the cathodic potential, current density, 2 or adding molecular agents into the electrolyte. 3 On the other hand, the electrolyte of zinc nitrate-6-hydrate electrolyte used for Zn-ZnO nanocomposites formation can prevent Cl 2 contamination and meets the requirement of environmental protection. However, only ZnO was obtained at various deposition temperatures, 9 which could result from the lower applied current density. In this paper, a higher current density was used to prepare Zn-ZnO nanocomposites using zinc nitrate-6-hydrate electrolyte. The formation mechanism of Zn-ZnO nanocomposite and the role of Zn were also investigated.Several papers have been reported to prepare electrodeposited ZnO films at temperatures above 60°C on conductive electrodes, for example, indium tin oxide, 2,4 fluorine-doped tin oxide, 10 or n-type silicon 4 and gallium nitride 11 substrates. Boron-doped P-type (100) Si wafer with resistivity of 1-10 Ω-cm was used as the substrate in this experiment. The p-Si wafer is rarely used in electrodeposition, and we developed a simple way to deposit ZnO onto it. By this method, we can further build a structure of high quality n-ZnO on p-substrates to apply p-n junction devices. Otherwise, the heterojunction of n-ZnO and p-Si has the potential to separate the electron and hole and benefits the photocatalysis.Aluminum cathode was evaporated on the backside of the Si substrate. It was then coated with photoresist for the protection of the Al electrode during ZnO growth. A platinum sheet was used as the anode electrode. 0.1 M zinc nitrate-6-hydrate aqueous solution was used as the electrolyte. In order to investigate the function of current density (fixed at 0.1, 1, 10, and 20 mA/cm 2 ) for electrodepsited ZnO, the deposition temperature was fixed at 30°C. In order to investigate the function of deposition temperature (fixed at 30 and 65°C), the current density was fixed at 20 mA/cm 2 . T...

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Chemical Precipitation Synthesis and Optical Properties of ZnO/SiO ₂ Nanocomposites

Yang

Xiao²,

Liu³

et al. 2009

Progress in Nanotechnology

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Morphological Control of ZnO Nanostructures by Electrodeposition

Cited by 397 publications

References 33 publications

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Optical Emissions of Zn and ZnO in Zn-ZnO Structure Synthesized by Electrodeposition with Aqueous Solution of Zinc Nitrate-6-hydrate

Chemical Precipitation Synthesis and Optical Properties of ZnO/SiO ₂ Nanocomposites

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Morphological Control of ZnO Nanostructures by Electrodeposition

Cited by 397 publications

References 33 publications

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Optical Emissions of Zn and ZnO in Zn-ZnO Structure Synthesized by Electrodeposition with Aqueous Solution of Zinc Nitrate-6-hydrate

Chemical Precipitation Synthesis and Optical Properties of ZnO/SiO 2 Nanocomposites

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Chemical Precipitation Synthesis and Optical Properties of ZnO/SiO ₂ Nanocomposites