Effect of Experimental Parameters on the Fabrication  of Gold Nanoparticles via Laser Ablation

Imam, Hisham; Elsayed, Khaled A.; Ahmed, M.A.; Ramdan, Rania

doi:10.4236/opj.2012.22011

Cited by 60 publications

(32 citation statements)

References 48 publications

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“…Red-shift in the plasmon peak ensures the increase in mean particle size and the presence of agglomerates. Also, red-shift can be related to scattering of light by particles that aggregate into big particles [1,21,[31][32][33][34]. The peak intensity of NPs prepared at 1.2 J cm −2 is higher than that prepared at 1.5 J cm −2 .…”

Section: Uv-visible Absorption Measurementsmentioning

confidence: 99%

Synthesis and optical characterization of copper nanoparticles prepared by laser ablation

et al. 2017

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The remarkable size-tunable properties of nanoparticles (NPs) make them a hot research topic with applications in a wide range of fields. Hence, copper (Cu) colloidal NPs were prepared using laser ablation (Nd:YAG, 1064 nm, 7 ns, 10 Hz, 6000 pulses) of a copper metal plate at different laser fluences (LFs) in the range of 1-2.5 J cm −2 in ethylene glycol (EG), at room temperature. Analysis of NPs was carried using different independent techniques such as ultraviolet-visible (UV-vis) spectroscopy; transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy. TEM analysis showed that the NPs were spherical with a bimodal distribution and an average particle size of 5 and 16 nm influence of 1.2 J cm −2 , and 9 and 22 nm at 2 J cm −2. The UV-vis spectra of colloidal NPs revealed the maximum absorbance at around 584 nm, indicating the formation of Cu NPs, which supported using FTIR spectra. Furthermore, the absorption spectra confirmed the metallic nature of Cu NPs. FTIR spectroscopy was utilized to verify information about the NPs surface state and chemical bonds constructed in the atom groups apparent on their surface.

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Section: Uv-visible Absorption Measurementsmentioning

confidence: 99%

Synthesis and optical characterization of copper nanoparticles prepared by laser ablation

et al. 2017

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“…To get above-mentioned applications from these materials, they are a lot of reports in the bulk, thin film, or single nanoparticels of PZT structures [14]. After that, to get more efficiency, composite, sandwich, or heterogeneous structures of these materials have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Tunable Piezophotonic Effect on Core-Shell Nanoparticles Prepared by Laser Ablation in Liquids under External Voltage

Kodeary

Hamidi

2019

Journal of Nanotechnology

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We report an experimental study on the piezophotonic effect of gold and lead zirconate titanate (PbZrTiO3) nanoparticles (NPs) and also their core-shell nanostructures prepared by the laser ablation in liquid method. To obtain these NPs and composite materials, the targets were immersed in deionized water and a polymeric solution of polyvinyl pyrrolidone (PVP) under Nd:YAG laser pulses irradiation. Linear and nonlinear properties of these NPs were studied by optical spectroscopy and the Z-scan technique. Furthermore, tunable nonlinear properties of the NPs were measured under an external electric field under illumination to investigate the piezophotonic effect. Our results show that, at the interface of PZT and Au, due to the Schottky barrier, we have electron/hole recombination prevention, which leads to efficient enhancement in the nonlinear properties.

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“…For example, at a water level of 2 mm above the sample, the focal distance should be increased by about 0.5 mm and for 4 mm this distance should be 1 mm. It is worth mentioning that the focal length of the laser-focusing lens and the position of the target material have a significant effect on the size distribution and the shape of the nanoparticles produced [2].…”

Section: Effects Of Wavelengths On the Size Of The Nanoparticlesmentioning

confidence: 99%

“…In addition, a higher concentration of nanoparticles was obtained at shorter laser wavelengths. Imam et al [2] found that smaller Au nanoparticles and a higher rate of productivity were generated by nanosecond laser ablation in water at 532 nm than those produced at 1064 nm wavelength. He et al [8] produced ZnO nanoparticles by nanosecond laser ablation in a liquid medium at a wavelength of 355 nm.…”

Section: Introductionmentioning

confidence: 99%

“…An advantage of laser production of nanoparticles is the high purity of the nanoparticles produced, special surface charge characteristics and easy preparation in comparison with chemical methods. It was found that various laser parameters such as laser power, energy density (fluence), beam spot size, scanning speed and media under which ablation takes place and wavelength [2,3], may be used to manipulate the size distribution and shape of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of characteristics of selected metallic and metal oxide nanoparticles produced by picosecond laser ablation at 532 and 1064 nm wavelengths

Hamad

2016

Appl. Phys. A

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Picosecond laser generation of nanoparticles was only recently reported. The effect of laser wavelength in picosecond laser generation of nanoparticles is not yet fully understood. This investigation reports the new findings comparing the characteristics of Au, Ag, Ag-TiO 2 , TiO 2 , ZnO and iron oxide nanoparticles generated by picosecond laser ablation in deionised water at 532 and 1064 nm laser wavelengths. The laser ablation was carried out at a fixed pulse width of 10 ps, a repetition rate of 400 kHz and a scan speed of 250 mm/s. The nanoparticles were characterised by UV-Vis optical spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The work shows that there is no noticeable difference in the size of the metal oxide nanoparticles produced at 532 and 1064 nm, especially for the TiO 2 and ZnO nanoparticles; however, a considerable size difference can be seen for metallic (e.g. Au) and metallic compound (e.g. Ag-TiO 2 ) nanoparticles at the two wavelengths. It demonstrates that noble metals are more profoundly affected by laser wavelengths. The reasons behind these results are discussed. In addition, the work shows that there are different crystalline structures of the TiO 2 nanoparticles at 1064 and 532 nm wavelengths.

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Effect of Experimental Parameters on the Fabrication of Gold Nanoparticles via Laser Ablation

Cited by 60 publications

References 48 publications

Synthesis and optical characterization of copper nanoparticles prepared by laser ablation

Synthesis and optical characterization of copper nanoparticles prepared by laser ablation

Tunable Piezophotonic Effect on Core-Shell Nanoparticles Prepared by Laser Ablation in Liquids under External Voltage

Comparison of characteristics of selected metallic and metal oxide nanoparticles produced by picosecond laser ablation at 532 and 1064 nm wavelengths

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