ZnO nanomaterials synthesized from thermal evaporation of ball-milled ZnO powders

Lee, Jong Soo; Park, Kwangsue; Kang, Myung Il; Park, Il Woo; Kim, Soo Won; Cho, Woon Kap; Han, Hye‐Jung; Kim, Sangsig

doi:10.1016/s0022-0248(03)01197-7

Cited by 116 publications

(53 citation statements)

References 18 publications

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“…A number of workers have produced this material using the same technique, [21][22][23][24][25] but some of the modifications observed in this study have not been reported earlier. These include the final shapes of the nanoparticles, which became quite spherical ( Figure 3E1).…”

Section: Discussionmentioning

confidence: 85%

“…Recently, mechanical milling has proved to be an effective and simple technique without involving high temperature treatment for the production of nanocrystalline powders, with the possibility of obtaining large quantities of materials with modified properties. [21][22][23][24][25] In this technique, starting powder particles are trapped between highly kinetic colliding balls and the inner surface of the vial, which causes repeated deformation, rewelding, and fragmentation of premixed powders resulting in the formation of fine, dispersed particles in the grain-refined matrix. During the milling operation, two essential processes affect the particle characteristics.…”

mentioning

confidence: 99%

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High-energy ball milling technique for ZnO nanoparticles as antibacterial material

Salah¹,

Habib²,

Khan³

et al. 2011

IJN

219

107

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Nanoparticles of zinc oxide (ZnO) are increasingly recognized for their utility in biological applications. In this study, the high-energy ball milling (HEBM) technique was used to produce nanoparticles of ZnO from its microcrystalline powder. Four samples were ball milled for 2, 10, 20, and 50 hours, respectively. The structural and optical modifications induced in the ‘as synthesized’ nanomaterials were determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and photoluminescence emission spectra (PL). SEM and TEM results show a gradual decrease in particle size from around 600 to ∼30 nm, with increased milling time. The initial microstructures had random shapes, while the final shape became quite spherical. XRD analysis showed ZnO in a hexagonal structure, broadening in the diffracted peaks and going from larger to smaller particles along with a relaxation in the lattice constant c . The value of c was found to increase from 5.204 to 5.217 Å with a decrease in particle size (600 to ∼30 nm). PL result showed a new band at around 365 nm, whose intensity is found to increase as the particles size decreases. These remarkable structural and optical modifications induced in ZnO nanoparticles might prove useful for various applications. The increase in c value is an important factor for increasing the antibacterial effects of ZnO, suggesting that the HEBM technique is quite suitable for producing these nanoparticles for this purpose.

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Section: Discussionmentioning

confidence: 85%

mentioning

confidence: 99%

High-energy ball milling technique for ZnO nanoparticles as antibacterial material

Salah¹,

Habib²,

Khan³

et al. 2011

IJN

219

107

View full text Add to dashboard Cite

show abstract

“…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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“…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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ZnO nanomaterials synthesized from thermal evaporation of ball-milled ZnO powders

Cited by 116 publications

References 18 publications

High-energy ball milling technique for ZnO nanoparticles as antibacterial material

High-energy ball milling technique for ZnO nanoparticles as antibacterial material

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

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

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