Growth mechanism of tubular ZnO formed in aqueous solution

Wei, Anne; Sun, Xiao Wei; Xu, Chunxiang; Dong, Zhili; Yang, Yi; Tan, Swee Tiam; Huang, Wei

doi:10.1088/0957-4484/17/6/033

Cited by 178 publications

(114 citation statements)

References 22 publications

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“…15 Three models of ZnO nanowire with different diameters, including Φ8.5 Å, Φ15.6 Å and Φ35.5 Å, are constructed with the same initial length of ∼13 nm and the corresponding number of atoms is 1200, 4050 and 18350, respectively. Fig.…”

Section: A Physical Modelingmentioning

confidence: 99%

Understanding the tensile behaviors of ultra-thin ZnO nanowires via molecular dynamics simulations

Wang

Lei

et al. 2016

AIP Advances

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By using molecular dynamics (MD) method, the tensile behavior of ultra-thin ZnO nanowires in <0001 > orientation with three different diameters have been investigated respectively. Through the numerical simulations, the tensile properties including Young’s modulus and yielding stress are obtained as functions of strain rates, temperatures and diameter sizes. The simulation results indicate that the nanowire Young’s modulus and yielding stress would decrease with the increasing of diameter size. In addition, a significant dependence of tensile properties on temperature was also observed with the Young’s modulus and yielding stress decreasing on average by 8% and 18% respectively, while the temperature rises from 0.1 K to 400 K. However, in our simulations the Young’s modulus and yielding stress have no obvious change with different strain rates. Lastly, the structure of ultra-thin ZnO nanowires could be transformed at the strain of ∼7%-11% while the nanowires eventually fracture at the strain of nearly 15%.

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Section: A Physical Modelingmentioning

confidence: 99%

Understanding the tensile behaviors of ultra-thin ZnO nanowires via molecular dynamics simulations

Wang

Lei

et al. 2016

AIP Advances

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“…In the case of ZnO, it is able to satisfy above properties because it can be easily synthesized in various shapes like particles, rods, needles, shells, tubes, wires, nails, belts, combs, propellers, springs, tetrapods, etc. [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optical characterization of porous ZnO

et al. 2013

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Abstract:In this paper, a simple and cheap method to prepare porous ZnO by using zinc nitrate, ethanol and triethanolamine (TEA) is reported. The as-prepared sample consisted of nano and micro pores. The sample was calcined at 300 ℃, 400 ℃ and 500 ℃ with different heating rates. At 500 ℃, the nano pores disappeared but the sample maintained its micro porosity. Field emission scanning electron microscopy (FE-SEM) pictures confirmed that the size and growth of ZnO nanoparticles depended on the heating conditions. The infrared (IR) absorption peak of Zn-O stretching vibration positioned at 457 cm 1 was split into two peaks centered at 518 cm 1 and 682 cm 1 with the change of morphology. These results confirmed that Fourier transform infrared (FT-IR) spectrum was sensitive to variations in particle size, shape and morphology. The photoluminescence (PL) spectrum of porous ZnO contained five emission peaks at 397 nm, 437 nm, 466 nm, 492 nm and 527 nm. Emission intensity enhanced monotonously with increase of temperature and the change was rapid between temperatures of 300 ℃ and 500 ℃. This was due to the elimination of organic species and improvement in the crystallanity of the sample at 500 ℃.

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“…Among which, ZnO has wide applications in the areas such as solar cells [2][3][4], catalysis [5,6], sensors [7], laser diodes [8] and varistors [5,9]. Various techniques had been employed for the synthesis of the nano/micro structured ZnO such as sol-gel process [10], homogeneous precipitation [5], thermal decomposition [11], microwave heating [12], conventional hydrothermal [13][14][15], etc. Compared with the conventional heating methods, the microwave heating has many advantages of developing small particles of metal oxides with nano or micro sizes and better purity in short time [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

2013

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Zinc oxide was synthesized from zinc sulphate using different reducing agents under microwave irradiation. The influence of sodium borohydride, hydrazine hydrate and urea on the shape and size of the products were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). SEM showed the nano-sized spherical and rectangular shaped structures in case of sodium borohydride and hydrazine hydrate, whereas micro-sized hexagonal structures were formed in case of urea under the same irradiation power. The reducing agents played an important role in forming the various structures. Thus different shapes and size of structures were produced by only varying the reducing agent, which had wide applications in various fields.

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Growth mechanism of tubular ZnO formed in aqueous solution

Cited by 178 publications

References 22 publications

Understanding the tensile behaviors of ultra-thin ZnO nanowires via molecular dynamics simulations

Understanding the tensile behaviors of ultra-thin ZnO nanowires via molecular dynamics simulations

Synthesis and optical characterization of porous ZnO

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

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