Preparation and Study Optical Limiting of Gold Nps by Pulsed Laser Ablation in Distilled Water (DDDW)

2021 ◽  
Vol 1039 ◽  
pp. 230-236
Author(s):  
Zainab F. Khudhair ◽  
Raad Sh. Alnayli
Keyword(s):  
Laser Ablation ◽  
Colloidal Solution ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Au Nps ◽  
Atomic Force ◽  
Optical Limiter ◽  
Gold Nps ◽  
Gold Metal ◽  
Absorbance Spectra

Abstrac. In the present work, gold nanoparticle (Au NPs) was synthesis by pulsed laser ablation (PLA) by using Q-switched, (Nd: YAG) (E=80mJ) (λ=532,1064nm) and Number of pulses (500)pulse of the gold metal target in deionized water. The optical properties were studied with a UV-vis spectrophotometer which tests the absorbance spectra and comparison of the generated nanoparticles solution. atomic force microscope (AFM) results show that the grain size increase by decreasing wavelength. The optical limiter of the resulting colloidal solution was studied.

Preparation and Characterization of Gold Coated Super Paramagnetic Iron Nanoparticle Using Pulsed Laser Ablation in Liquid Method

2021 ◽  
Vol 886 ◽  
pp. 77-85
Author(s):  
Adawiya J. Haider ◽  
Maha A. Al-Kinani ◽  
Sharafaldin Al-Musawi
Keyword(s):  
Laser Ablation ◽  
Laser Fluence ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Laser Ablation In Liquid ◽  
Au Nps ◽  
Laser Fluences ◽  
Atomic Force ◽  
Mean Size ◽  
Uv Visible

Fe@Au is a type of nanoparticle that contains magnetic Fe NPs core with a fine layer of Au NPs synthesized using the Pulsed Laser Ablation in Liquid (PLAL) Method. These Fe@Au NPs characterized by Atomic Force Microscope (AFM), Field Emission Scanning Electron Microscopy (FESEM), and UV-Visible Spectrophotometer. The result was obtained at different laser fluences (1.9, 2.2, and 2.5) J/cm2 with fixed pulse duration 5 ns, wavelength 532nm and number of pulse equal 100 pulsed. The obtained mean size of Fe@Au NPs at laser fluence (1.9, 2.2, and 2.5) J/cm2 was (63.65, 32.47 and 31.18) nm respectively. UV-Visible Spectrophotometer carves was showed a redshift toward longer wavelength by increasing particle size. Obtained results exhibited that the laser fluence plays a key role in the size, and dispersity of Fe@Au NPs.

Micro Raman Spectroscopy of Silicon Nanocrystals Produced by Picosecond Pulsed Laser Ablation

2002 ◽  
Vol 738 ◽  
Author(s):  
M. H. Wu ◽  
R. Mu ◽  
A. Ueda ◽  
D. O. Henderson ◽  
B. Vlahovic
Keyword(s):  
Laser Ablation ◽  
Raman Spectra ◽  
Silicon Nanocrystals ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Size Distributions ◽  
Laser Plume ◽  
Force Microscopy ◽  
Atomic Force

ABSTRACTPulsed laser ablation has been used to produce silicon nanocrystals. Variation of the laser fluence, backing gas type and pressure result in nanocrystals with controllable size distributions. Properties of nanocrystals produced with this method also depend on the distance of the nanocrystal from the center of the laser plume. Correlated atomic force microscopy and in-situ micro-Raman measurements confirm that particle size decreases as distance from the plume center increases. Silicon peaks in the micro raman spectra taken at increasing distance from plume center show considerable differences in both center energy and width. Confocal micro raman spectra from thicker (> 10 micron) samples show little variation with depth, in contrast with porous silicon samples.

Synthesis of Cadmium and its Oxide Nanomaterials by Pulsed Laser Ablation in Aqueous Media

2008 ◽  
Vol 1074 ◽  
Author(s):  
Subhash Chandra Singh ◽  
Rajkumar Swarnkar ◽  
Ram Gopal
Keyword(s):  
Laser Ablation ◽  
Colloidal Solution ◽  
Aqueous Media ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Distilled Water ◽  
Visible Absorption ◽  
Cadmium Metal ◽  
Uv Visible

ABSTRACTCadmium based oxide and hydroxide nanocomposites material is synthesized by pulsed laser ablation of cadmium metal in the double distilled water. A piece of cadmium metal, placed on the bottom of glass vessel containing double distilled water, was irradiated with 1064 nm of pulsed Nd:YAG laser operating at 35 mJ/pulse energy and 10 ns pulse width for 30 minutes. Colloidal solution of produced Nanoparticles is found stable for two days. Fine white colored powder is obtained after drying centrifuged solution. UV-visible absorption of colloidal solution, XRD, TGA, DTA and FTIR of the powder is used for the characterization of material. Possible mechanism of synthesis and hydroxide to oxide transition is discussed.

C-Axis Oriented Thin Films of PbZrO3 on Silicon Substrate by Pulsed Laser Ablation

1996 ◽  
Vol 433 ◽  
Author(s):  
S. Chattopadhyay ◽  
V. R. Palkar ◽  
P. Ayyub ◽  
S. C. Purandare ◽  
S. P. Pam ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Silicon Substrate ◽  
Single Phase ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Lead Zirconate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Oriented Films ◽  
Substrate Temperatures

AbstractWe report the successful deposition of single phase c-axis oriented films of lead zirconate (PbZrO3) on a silicon substrate by pulsed laser ablation. The formation of the film at different substrate temperatures was studied using atomic force microscopy and scanning electron microscopy. We also measured the temperature dependence of the dielectric constant of the films and their dielectric hysteresis behavior.

Gold Nanoparticles in Liquid Based on Photonic Crystal Fiber PCF for Sensors Application

2020 ◽  
Vol 398 ◽  
pp. 23-28 ◽  
Author(s):  
Salah Aldeen Adnan ◽  
Zainab H. Tawfiq ◽  
Makram A. Fakhri
Keyword(s):  
Laser Ablation ◽  
Laser Wavelength ◽  
X Ray Diffraction ◽  
Laser Ablation In Liquid ◽  
Gold Target ◽  
Au Nps ◽  
Force Microscopy ◽  
Crystal Fiber ◽  
Atomic Force ◽  
Gold Nps

The effect of laser wavelength on gold nanoparticle (Au NPs) fabrication is reported by using the laser ablation in the liquid method in the ethanol. The Pulsed Laser ablation in liquid technique of the gold target was ablated using an Nd:YAG laser nanopulsed nanosecond after that the investigation of the gold NPs was tested by the AFM (Atomic Force Microscopy), and the (XRD) X-ray diffraction. The results showed the characteristics of prepared NPs, depending on XRD, AFM. NPs obtained by 532 nm laser possess better properties than that achieved by 1064 nm laser according to the highest intensity of shorter wavelengths.

Production of III-V Nanocrystals by Picosecond Pulsed Laser Ablation

2003 ◽  
Vol 780 ◽  
Author(s):  
M. H. Wu ◽  
R. Mu ◽  
A. Ueda ◽  
D. O. Henderson
Keyword(s):  
Atomic Force Microscopy ◽  
Laser Ablation ◽  
Optical Absorption ◽  
Raman Scattering ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Rutherford Backscattering ◽  
Scattering Data ◽  
Force Microscopy ◽  
Atomic Force

AbstractIn As nanoparticles have been produced by picosecond pulsed laser ablation of bulk targets in the presence of an inert backing gas. Atomic force microscopy measurements show particles ranging in size from one to ten nm. Stoichiometry of the targets, determined by Rutherford backscattering measurements, are typically preserved within ten percent. Optical absorption and raman scattering data help confirm the crystalline, quantum confined nature of the nanoparticles.

Size Reduction of Gold Nanoparticles by Pulsed Laser Ablation and Re-Irradiation in Water Media

2011 ◽  
Vol 695 ◽  
pp. 174-177 ◽  
Author(s):  
Pichitchai Pimpang ◽  
Duangmanee Wongratanaphisan ◽  
Atcharawan Gardchareon ◽  
Supab Choopun
Keyword(s):  
Gold Nanoparticles ◽  
Laser Ablation ◽  
Zeta Potential ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Size Reduction ◽  
Au Nps ◽  
Vis Spectroscopy ◽  
Water Media ◽  
Cover Slide

Gold nanoparticles (Au NPs) were prepared by using pulsed laser ablation with and without cover slide. The cover slide was used to confine atoms/ions in order to reach supersaturation condition. The obtained Au NPs were investigated by UV-vis spectroscopy, transmission electron microscopy (TEM), and zeta potential measurement. The absorbance spectra exhibited its absorption peak at around 520 nm for both Au NPs ablating with and without cover slide. It was found that Au NPs ablating with cover slide exhibited smaller size and size distribution (10.6 ± 5.9 nm) than those of without cover slide (34.1 ± 21.5 nm) at laser power of 5.00 mJ/pulse. This is due to supersaturation effect and re-irradiation effect caused by cover slide that trapped atoms/ions of gold and trapped Au NPs, respectively. Also, the zeta potential of Au NPs had a negative value suggesting negative surface charge. The lowest zeta potential was observed for Au NPs ablating with cover slide at 5.00 mJ/pulse and it was in consistent with an observation of the highest pH value. In addition, the Au NPs ablating with cover slide at 5.00 mJ/pulse showed the least change with time indicating the most stable Au NPs which was in consistent with the lowest zeta potential results. Thus, pulsed laser re-irradiation could be used for size reduction of Au NPs prepared by pulsed laser ablation in water media.

Synthesis of thin films of polycrystalline ferroelectric BiNbO4 on Si by pulsed laser ablation

1998 ◽  
Vol 13 (5) ◽  
pp. 1113-1116 ◽  
Author(s):  
Soma Chattopadhyay ◽  
Pushan Ayyub ◽  
R. Pinto ◽  
M. S. Multani
Keyword(s):  
Thin Films ◽  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Polycrystalline Thin Films ◽  
Ambient Oxygen

The stibiotantalite (ABO4) family includes a number of ferroelectrics and antiferroelectrics with excellent potential for applications. We report the deposition of phase-pure, polycrystalline thin films of BiNbO4 on Si(100) substrates using pulsed laser ablation. The deposition conditions were optimized with respect to substrate temperature, laser parameters, and the ambient oxygen pressure. The films were characterized by x-ray diffraction, energy dispersive x-ray analysis, and Raman spectroscopy, while their microstructure was studied by atomic force microscopy and scanning electron microscopy. Dielectric hysteresis studies indicated that films with a thickness below ≈250 nm are ferroelectric, while thicker ones are antiferroelectric.

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