Effects of energy and hydrogen peroxide concentration on structural and optical properties of CuO nanosheets prepared by pulsed laser ablation

Azadi, Hajar; Aghdam, Hossein Dizajghorbani; Malekfar, Rasoul; Bellah, S. Moemen

doi:10.1016/j.rinp.2019.102610

Cited by 13 publications

(3 citation statements)

References 37 publications

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“…After aging for 7 days, diffraction peaks of the Cu phase remained sharp and strong, and two new peaks at 36.4° and 61.4° assigned to (111) and (220) planes of Cu 2 O (JCPDS, 65-3288) appeared. This indicated that a thin passive Cu 2 O layer formed on the porous Cu ligaments [ 37 , 38 ]. Raman spectra were measured to further determine the composition change in the samples at different process stages ( Figure 4 d).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Zhou,

Ye,

Han

et al. 2023

Molecules

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By taking advantage of typical dealloying and subsequent aging methods, a novel homogeneous porous brass with a micro/nano hierarchical structure was prepared without any chemical modification. The treatment of commercial brass with hot concentrated HCl solution caused preferential etching of Zn from Cu62Zn38 alloy foil, leaving a microporous skeleton with an average tortuous channel size of 1.6 μm for liquid transfer. After storage in the atmosphere for 7 days, the wettability of the dealloyed brass changed from superhydrophilic to superhydrophobic with a contact angle > 156° and sliding angle < 7°. The aging treatment enhanced the hydrophobicity of the brass by the formation of Cu2O on the surface. By virtue of the opposite wettability to water and oil, the aged brass separated surfactant-stabilized water-in-oil emulsions with separation efficiency of over 99.4% and permeate flux of about 851 L·m−2·h−1 even after recycling for 60 times. After 10 times of tape peeling or sandpaper abrasion, the aged brass maintained its superhydrophobicity, indicating its excellent mechanical stability. Moreover, the aged brass still retained its superhydrophobicity after exposure to high temperatures or corrosive solutions, displaying high resistance to extreme environments. The reason may be that the bicontinuous porous structure throughout the whole foil endows stable mechanical properties to tolerate extreme environments. This method should have a promising future in expanding the applications of alloys.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Zhou,

Ye,

Han

et al. 2023

Molecules

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“…In [107], it was shown that, at least for the used parameter range of the continuous-wave (CW) laser, with increasing power of the laser beam during bath deposition, the growth of ZnO nanostructures was enhanced, resulting in improved morphology and electrical conductivity. Laser-ablation synthesis in solution (LASiS), which combines laser ablation with solution chemistry, was used to produce one-dimensional CuO nanowires or nanorods, as well as CuO thin films [108]. Post-ablative laser irradiation of nanomaterials in suspension states was used for additional modification of their geometry: Size and shape [109].…”

Section: Formation Of One-and Two-dimensional Zno and Cuo Structuresmentioning

confidence: 99%

Creation of One- and Two-Dimensional Copper and Zinc Oxides Semiconductor Structures

Murzin,

Kazanskiy

2023

Applied Sciences

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The most effective methods for the synthesis of nanostructured copper and zinc oxides, which have unique properties and potential applications in a variety of fields including electronics, photonics, sensorics, and energy conversion, are analyzed. Special attention is paid to laser-based methods for synthesizing oxide nanostructures, with an emphasis on the importance of controlling power density distribution to influence the quality and properties of the nanomaterials. The great significance of wavefront shaping techniques for controlling laser-initiated processes is highlighted, which enable precise control over the phase and amplitude of light waves to achieve desired outcomes in optics and laser-assisted formation of one- and two-dimensional structures of oxide semiconductor materials. Diffractive computer optics is presented as a powerful tool for precise beam control. The significance of laser-induced thermochemical processes for creating and improving the properties of ZnO and CuO-based nanomaterials is discussed. The presented analysis shows that the synthesis of nanocomposites based on ZnO and CuO using pulse-periodic laser treatment, coupled with precise laser beam control using free-form diffractive optics, presents novel opportunities for applications in optoelectronics, sensor technology, electronics and portable energy sources manufacturing, and various other fields.

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“…It is clear in the FESEM images that the morphology of laser ablated nanostructures is spherical in shape and does not change significantly with changing liquid media such as SDS and CTAB, and the size of CuO nanospheres is slightly decreased with ablation in the SDS surfactant and increased in CTAB. This prompted the use of SDS and CTAB surfactants as nanoparticle stabilizing agents, which protect them from aggregation and other external influences [34].…”

Section: Fesem Imagingmentioning

confidence: 99%

The Antibacterial Activities of Copper Oxide Nanoparticles Synthesized Using Laser Ablation in Different Surfactants against Streptococcus mutans

Abbas¹,

Kadhim²,

Haleem³

2023

Journal of Renewable Materials

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Copper oxide nanoparticles (CuO NPs) were synthesised with laser ablation of a copper sheet immersed in deionized water (DW), cetrimonium bromide (CTAB), and sodium dodecyl sulphate (SDS), respectively. The target was irradiated with a pulsed Nd: YAG laser at 1064 nm, 600 mJ, a pulse duration of 10 ns, and a repetition rate of 5 Hz. The CuO NPs colloidal were analyzed using UV-Vis spectroscopy, the Fourier transform infrared (FTIR) spectrometer, zeta potential (ZP), X-ray diffraction (XRD), transmission electron microscope (TEM) and field emission scanning electron microscopy (FESEM). The absorption spectra of CuO NPs colloidal showed peaks at 214, 215 and 220 nm and low-intensity peaks at 645, 650 and 680 nm for SDS, CTAB and DW, respectively. CuO NPs' colloidal results are (−21.6, 1.2, and 80 mV) for negatively, neutrally, and positively charged SDS, DW, and CTAB, respectively. The XRD pattern of the NPs revealed the presence of CuO phase planes (110) ( 111), (20-2) and (11-1). The TEM images revealed nearly spherical NPs, with sizes ranging from 10-90, 10-50, and 10-210 nm for CuO NPs mixed with DW, SDS and CTAB, respectively. FESEM images of all the synthesized samples illustrate the formation of spherical nanostructure and large particles are observable. The CuO NPs were tested for antibacterial activity against Streptococcus mutans by using the well diffusion method. In this method, CuO NPs prepared in DW at a concentration of 200 μg/mL showed a greater inhibition zone against Streptococcus mutans.

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Effects of energy and hydrogen peroxide concentration on structural and optical properties of CuO nanosheets prepared by pulsed laser ablation

Cited by 13 publications

References 37 publications

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Fabrication of Superhydrophobic Porous Brass by Chemical Dealloying for Efficient Emulsion Separation

Creation of One- and Two-Dimensional Copper and Zinc Oxides Semiconductor Structures

The Antibacterial Activities of Copper Oxide Nanoparticles Synthesized Using Laser Ablation in Different Surfactants against Streptococcus mutans

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