High-frequency properties of oil-phase-synthesized ZnO nanoparticles

Ding, Hao-Feng; Yang, Haitao; Liu, Liping; Ren, Xiao; Song, Ningning; Shen, Jun; Zhang, Xiang-Qun; Cheng, Ziqiang; Zhao, Guijuan

doi:10.1088/1674-1056/24/2/027804

Cited by 1 publication

(1 citation statement)

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“…[1] Due to these tremendous properties, ZnO nanoparticles have been extensively used in light-emitting diodes, laser diodes, solar cells, microelectronic, surface acoustic wave devices, hydrogen-storage devices, transparent electrodes, transparent thin-film transistors, antibacterial coating, UV protectors, targeted drug delivery and sensors. [2][3][4][5] ZnO is an inorganic antibacterial agent and has enormous advantages due to biocompatibility, action against bacteria in the neutral region (pH 7) even in darkness, non-toxicity to humans, ability to withstand harsh conditions, and being more durable compared to the conventional organic materials. [6] Therefore, these unique properties make it the right candidate for antibacterial applications and suitable for industrial usage.…”

Section: Introductionmentioning

confidence: 99%

Spectral features and antibacterial properties of Cu-doped ZnO nanoparticles prepared by sol-gel method

Samavati¹,

Ismail²,

Nur³

et al. 2016

Chinese Phys. B

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Zn 1−x Cu x O (x = 0.00, 0.01, 0.03, and 0.05) nanoparticles are synthesized via the sol-gel technique using gelatin and nitrate precursors. The impact of copper concentration on the structural, optical, and antibacterial properties of these nanoparticles is demonstrated. Powder x-ray diffraction investigations have illustrated the organized Cu doping into ZnO nanoparticles up to Cu concentration of 5% (x = 0.05). However, the peak corresponding to CuO for x = 0.01 is not distinguishable. The images of field emission scanning electron microscopy demonstrate the existence of a nearly spherical shape with a size in the range of 30-52 nm. Doping Cu creates the Cu-O-Zn on the surface and results in a decrease in the crystallite size. Photoluminescence and absorption spectra display that doping Cu causes an increment in the energy band gap. The antibacterial activities of the nanoparticles are examined against Escherichia coli (Gram negative bacteria) cultures using optical density at 600 nm and a comparison of the size of inhibition zone diameter. It is found that both pure and doped ZnO nanoparticles indicate appropriate antibacterial activity which rises with Cu doping.

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