scholarly journals Synthesis and Properties of Platinum Nanoparticles by Pulsed Laser Ablation in Liquid

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Maria Isabel Mendivil Palma ◽  
Bindu Krishnan ◽  
Guadalupe Alan Castillo Rodriguez ◽  
Tushar Kanti Das Roy ◽  
David Avellaneda Avellaneda ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Photoelectron Spectroscopy ◽  
Laser Energy ◽  
Pulsed Laser ◽  
Pt Nanoparticles ◽  
Pulsed Laser Ablation ◽  
Laser Ablation In Liquid ◽  
Visible Absorption ◽  
Energy Fluence ◽  
Ablation Time

Platinum (Pt) nanoparticles were synthesized by pulsed laser ablation in liquid (PLAL) technique in different liquids (acetone, ethanol, and methanol). Ablation was performed using a Q-switched Nd:YAG laser with output energy of 230 mJ/pulse for 532 nm wavelength. Ablation time and laser energy fluence were varied for all the liquids. Effects of laser energy fluence, ablation time, and nature of the liquid were reported. The mean size, size distributions, shape, elemental composition, and optical properties of Pt nanoparticles synthesized by PLAL were examined by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-Visible absorption spectroscopy.

scholarly journals Ablation energy, water volume and ablation time: Gold nanoparticles obtained through by pulsed laser ablation in liquid

2019 ◽  
Vol 1386 ◽  
pp. 012062
Author(s):  
M Hernández-Maya ◽  
P Rivera-Quintero ◽  
R Ospina ◽  
J H Quintero-Orozco ◽  
A C García-Castro
Keyword(s):  
Gold Nanoparticles ◽  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Water Volume ◽  
Laser Ablation In Liquid ◽  
Ablation Time

scholarly journals Impact of ablation time on Cu oxide nanoparticle green synthesis via pulsed laser ablation in liquid media

2018 ◽  
Vol 124 (9) ◽  
Author(s):  
Batool Eneaze B. Al-Jumaili ◽  
Zainal Abidin Talib ◽  
Azmi Zakaria ◽  
Asmiet Ramizy ◽  
Naser M. Ahmed ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Green Synthesis ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Liquid Media ◽  
Laser Ablation In Liquid ◽  
Ablation Time ◽  
Oxide Nanoparticle

scholarly journals Influence of Titania Synthesized by Pulsed Laser Ablation on the State of Platinum during Ammonia Oxidation

2020 ◽  
Vol 10 (14) ◽  
pp. 4699
Author(s):  
Andrey Stadnichenko ◽  
Dmitry Svintsitskiy ◽  
Lidiya Kibis ◽  
Elizaveta Fedorova ◽  
Olga Stonkus ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Photoelectron Spectroscopy ◽  
Ammonia Oxidation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Active Species ◽  
Laser Ablation In Liquid ◽  
X Ray ◽  
Catalytically Active ◽  
Physicochemical Methods

A set of physicochemical methods, including X-ray photoelectron spectroscopy (XPS), X-ray diraction, electron microscopy and X-ray absorption spectroscopy, was applied to study Pt/TiO2 catalysts prepared by impregnation using a commercial TiO2-P25 support and a support produced by pulsed laser ablation in liquid (PLA). The Pt/TiO2-PLA catalysts showed increased thermal stability due to the localization of the highly dispersed platinum species at the intercrystalline boundaries of the support particles. In contrast, the Pt/TiO2-P25 catalysts were characterized by uniform distributionof the Pt species over the support. Analysis of Pt4f XP spectra shows that oxidized Pt2+ and Pt4+ species are formed in the Pt/TiO2-P25 catalysts, while the platinum oxidation state in the Pt/TiO2-PLA catalysts is lower due to stronger interaction of the active component with the support due to stronginteraction via Pt-O-Ti bonds. The Pt4f XP spectra of the samples after reaction show Pt2+ and metallic platinum, which is the catalytically active species. The study of the catalytic properties in ammonia oxidation showed that, unlike the catalysts prepared with a commercial support, the Pt/TiO2-PLA samples show higher stability during catalysis and significantly higher selectivity to N2 in a wide temperature range of 200–400 C.

scholarly journals Magnesium Nanoparticle Synthesis From Powders Via Pulsed Laser Ablation In Liquid For Wearables and Flexible Sensor Technologies

2021 ◽  
Author(s):  
Anesu Nyabadza ◽  
Mercedes Vázquez ◽  
Shirley Coyle ◽  
Brian Fitzpatrick ◽  
Dermot Brabazon
Keyword(s):  
Laser Ablation ◽  
Nanoparticle Synthesis ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Aluminum Foil ◽  
Bimodal Distribution ◽  
Laser Ablation In Liquid ◽  
Nanoparticle Distribution ◽  
Ablation Time ◽  
Magnesium Nanoparticles

Magnesium nanoparticles of various mean diameters (53 – 239 nm) were synthesized herein via Pulsed Laser Ablation in Liquid (PLAL) from millimeter sized magnesium powders within iso-propyl alcohol. It was observed via a 3x3 full factorial DOE that the processing parameters can control the nanoparticle distribution to produce three size-distribution types (bimodal, skewed and normal). Ablation times of 2, 5, and 25 minutes where investigated. An ablation time of 2 minutes produced a bimodal distribution with the other types seen at higher periods of processing. Mg nanoparticle UV-Vis absorbance at 204 nm increased linearly with increasing ablation time, indicating an increase in nanoparticle count. The colloidal density (mg/ml) generally increased with increasing nanoparticle mean diameter as noted via increasing UV-vis absorbance. High la-ser scan speeds (within the studied range of 3000 - 3500 mm/s) tend to increase the nanoparticle count/yield. For the first time, the effect of scan speed on colloidal density, UV-vis absorbance and nanoparticle diameter from metallic powder ablation was investigated and is reported herein. The nanoparticles formed dendritic structures after being drop cast on aluminum foil as observed via FESEM analysis. Dynamic light scattering was used to measure the size of the nanoparticles. Magnesium nanoparticles have promising use in the fabrication of wearables, such as in conductive tracks or battery electrodes, owing to their low heat capacity, high melting point and bio-compatibility.

scholarly journals Magnesium Nanoparticle Synthesis from Powders via Pulsed Laser Ablation in Liquid for Nanocolloid Production

2021 ◽  
Vol 11 (22) ◽  
pp. 10974
Author(s):  
Anesu Nyabadza ◽  
Mercedes Vázquez ◽  
Shirley Coyle ◽  
Brian Fitzpatrick ◽  
Dermot Brabazon
Keyword(s):  
Laser Ablation ◽  
Nanoparticle Synthesis ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Bimodal Distribution ◽  
Processing Parameters ◽  
Laser Ablation In Liquid ◽  
Nanoparticle Distribution ◽  
Ablation Time ◽  
Scan Speed

Magnesium nanoparticles of various mean diameters (53–239 nm) were synthesised in this study via pulsed laser ablation in liquid (PLAL) from millimetre sized magnesium powders within isopropyl alcohol. It was observed via a 3 × 3 full factorial design of experiments that the processing parameters can control the nanoparticle distribution to produce three size-distribution types (bimodal, skewed and normal). Ablation times of 2, 5, and 25 min where investigated. An ablation time of 2 min produced a bimodal distribution with the other types seen at higher periods of processing. Mg nanoparticle Ultraviolet–Visible spectroscopy (UV–Vis) absorbance at 204 nm increased linearly with increasing ablation time, indicating an increase in nanoparticle count. The colloidal density (mg/mL) generally increased with increasing nanoparticle mean diameter as noted via increasing UV–Vis absorbance. High laser scan speeds (within the studied range of 3000–3500 mm/s) tend to increase the nanoparticle count/yield. For the first time, the effect of scan speed on colloidal density, UV–Vis absorbance and nanoparticle diameter from metallic powder ablation was investigated and is reported herein. The nanoparticles formed dendritic structures after being drop cast on aluminium foil as observed via field emission scanning electron microscope analysis. Dynamic light scattering was used to measure the size of the nanoparticles. Magnesium nanoparticle inks show promise for use in the fabrication conductive tracks or thermal insulation in electronics.

scholarly journals Effect of laser energy and ablation time on the formation of aluminum nanoparticles by nanosecond laser ablation of aluminum target in ethanol

2019 ◽  
Vol 12 (25) ◽  
pp. 123-126
Author(s):  
Kadhim A. Aadim
Keyword(s):  
Laser Ablation ◽  
Laser Pulse Energy ◽  
Laser Energy ◽  
Pulsed Laser ◽  
Nanosecond Laser ◽  
Aluminum Nanoparticles ◽  
Visible Absorption ◽  
Ablation Time ◽  
Nanosecond Laser Ablation ◽  
Uv Visible

In this work we study the influence of the laser pulse energy and ablation time on the aluminum nanoparticles productivity during nanosecond laser ablation of bulk aluminum immersed in liquid.Aluminum nanoparticles were synthesized by pulsed laser ablation of Al targets in ethanol for 3-8 minutes using the 1064 nm wavelength of a Nd:YAG laser with energies of 300-500 mJ per pulse.The laser energy was varied between 300 and 500 mJ/pulse, whereas the ablation time was set to 5 minutes. UV-Visible absorption spectra was used for the characterization and comparison of products.

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