Controlled one-step fabrication of highly oriented ZnO nanoneedle/nanorods arrays at near room temperature

Wu, Xiaogang; Bai, Hua; Li, Chun; Lu, Gewu; Shi, Gaoquan

doi:10.1039/b516497d

Cited by 82 publications

(69 citation statements)

References 41 publications

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“…A relatively high peak intensity of the (101) miller indices at 2h = 36.35°w as observed, a ZnO peaks having much lower intensity were also detected at 2h = (47.7°, 56.56°, 62.9°, 68°and 36.2°) corresponding to the lattice miller indices (102) The low-magnification scanning electron microscopy (FESEM) image which clearly shows that the whole Zn foil Figure 6 shows XRD patterns of ZnO nanotetrapods, nanorods and nanoplane were constructed using thermal oxidation method at different oxidation temperature (700, 800 and 900°C). The diffraction of higher intensity peaks at (002) miller indices with 2h = 34.435°it can be recognized to a hexagonal wurtzite structure with lattice constants of a = 0.324 nm and c = 0.520 nm, according to the card number (JCPDS 36-1451) and this result agreement with investigation paper [7][8][9]. No diffraction peaks arising from metallic Zn or any impurity were observed in all ZnO samples can be detected in the pattern confirms that the grown products are pure ZnO nanostructure at different condition.…”

Section: Resultssupporting

confidence: 93%

Synthesis of semiconductor oxide nanosheets, nanotetrapods and nanoplane-suite like grown on metal foil using different method

2015

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ZnO production nanostructure using different method: first method, electrochemical deposition on Zn foil using 0.3 M zinc sulfate heptahydrate (ZnSO 4 Á7H 2 O) and sulfuric acid aqueous solution at a current density of 30 and 35 mA/cm 2 for deposition time 40 min at room temperature and second method, Zn foils were thermally oxidized in a conventional tube furnace at a temperature equal range of 700-900°C in air for 5 h or less in static air to prepared semiconductor nanomaterials ZnO nanorods, nanotetrapods and nanoplane. The XRD diffraction of higher intensity peaks at (101) and (002) miller indices for two methods can be recognized to a hexagonal wurtzite structure unit cell. Surface morphology images with different magnifications which clearly shows that the whole Zn foil and rod substrate obtained ZnO nanosheets, nanotetrapods, nanorods and growth nanoplanes were also found. The length of these nanotetrapods and nanorods lies in the equal range of 1-1.5 lm with an average diameter of 80 nm. It was well known that ZnO nano crystal exhibited two emission peaks. One was located at about 365 nm wavelength (UV luminescence band), and the other peak position at 475 nm wavelength (green luminescence band).

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Section: Resultssupporting

confidence: 93%

Synthesis of semiconductor oxide nanosheets, nanotetrapods and nanoplane-suite like grown on metal foil using different method

2015

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“…However, the growth process and mechanism of the formation of ZnO from Zn(OH) 4 2-is not yet well understood. The reported mechanism of formation of ZnO by researchers (Li et al 2007;Kale et al 2007;Hu et al 2007;Quang et al 2005;Shan et al 2004;Zhang et al 2002;Wu et al 2006;Samanta et al 2009a) is as follows:…”

Section: Growth and Morphology Of The Nanostructuresmentioning

confidence: 99%

Chemical growth of hexagonal zinc oxide nanorods and their optical properties

Samanta¹,

Bandyopadhyay²

2011

Appl Nanosci

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A simple wet chemical method has been successfully deployed to fabricate hexagonal zinc oxide nanorods. The structural characteristics were investigated through X-ray diffraction. The crystal unit cell of the nanorods was found to be hexagonal. The morphology of the nanostructures was studied using field emission scanning electron microscopy and transmission electron microscopy. The nanorods are hexagonal in shape. The Zn-O bond formation was confirmed through Fourier transformed infrared spectroscopic analysis. Raman shift measurements revealed various vibrational modes present in the ZnO crystal. The photoluminescence spectrum shows shallow deep level visible emission due to various defect states. Thus, our investigation will be very helpful in the development of ZnO based light emitting/optoelectronic device applications.

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“…The lattice distance d hkl (Å) is estimated from Bragg's law [6]. In hexagonal crystal system the angles =≠, == 90 Furthermore, the morphologies of straight or flowerlike/starlike ZnO nanorods either ending with regular hexagonal prism or with hexagonal pyramid, as derived from SEM images, are in accordance with XRD major reflexes, Fig.…”

Section: Code Of Materialsmentioning

confidence: 88%

“…Until now, many methods have been used to prepare the ZnO material as one-dimensional (1D) nanostructures with different morphologies including nanowires, nanorods, nanotubes, whiskers, nanocrystals, nanobelts and other superstructures [1, 3,5]. They represent a broad class of nanoscale building blocks that have been used to assemble functional devices such as lasers, photodetectors, field emitters, acoustic and short wavelength optical devices, gas sensors, piezoelectric transducers and actuators, solar cells etc [3,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO Nanostructures by Hydrothermal Method

Georgiou

Kolokotronis

Simitzis

2009

JNanoR

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Abstract. ZnO was synthesized by the hydrothermal method using proper aqueous solutions of ZnCl 2 and NaOH, as the main raw materials, corresponding to the molar ratio of Zn , amount of PEG) influence the morphology and the dimensions of the product. Increasing the residence time from 1 h → 3 h → 20 h, the amorphous regions illustrated in SEM images are decreased and the number and dimensions of the obtained single or branched rods of the final product are increased. Avoiding the use of additional water, i.e. the denominator in the aforementioned ratio, mL, water, is equal to zero, but simultaneously using ethanol, the ZnO material is mainly amorphous. Increasing the amount of the additional water without ethanol, no amorphous material is observed and single rods or flowerlike/starlike structures having ends of regular hexagonal pyramid structure, are formed. Increasing the proportion of PEG, many flowerlike or starlike branched structures having ends of regular hexagonal prismatic structure, are formed. The ZnO materials having much of amorphous regions do not show XRD peaks. On the other hand, the crystalline ZnO materials show many XRD peaks, which are indexed and they correspond to the wurtzite-structured (hexagonal) ZnO. Furthermore, the lattice constants  and c are determined.

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Controlled one-step fabrication of highly oriented ZnO nanoneedle/nanorods arrays at near room temperature

Abstract: Highly oriented ZnO nanoneedle/nanorods arrays have been fabricated by direct oxidation of zinc foil in alkaline zincate ion solution at near room temperature (20 degrees C for nanoneedles, 30 degrees C for nanorods).

Cited by 82 publications

References 41 publications

Synthesis of semiconductor oxide nanosheets, nanotetrapods and nanoplane-suite like grown on metal foil using different method

Synthesis of semiconductor oxide nanosheets, nanotetrapods and nanoplane-suite like grown on metal foil using different method

Chemical growth of hexagonal zinc oxide nanorods and their optical properties

Synthesis of ZnO Nanostructures by Hydrothermal Method

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