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Laser Ablation NWR213 - Elemental Scientific Laser ,

The industry's gold standard in 213 nm solid state laser ablation The NWR213 is an affordable yet no compromise instrument suitable for a wide range of applications A perfect complement to any ICP, ICP-MS, noble gas or stable isotope mass spectrometer...

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Solvent-surface interactions control the phase structure ,

A gold-iron nanoparticle system made by laser ablation in solution was intensively studied by Amendola et al 28,29,30,35 They showed how to combine the optical properties of gold, such as ....

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Size distribution of Au NPs generated by laser ablation of ,

Size distribution of Au NPs generated by laser ablation of a gold target in liquid with time-delayed femtosecond pulses E Axente 1 , M Barberoglou 2 , PG Kuzmin 3 , E Magoulakis 2 , P A Loukakos 2 , E Stratakis 2 , GA...

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DTIC ADA265535: The Laser Ablation of Gold Films at the ,

The results indicate that for the 532 and 355 nm pulsed laser ablation of gold thin films, 10 (exp 13) - 10 (exp 15) atom per pulse are removed over the fluence range of 05-50 J/sq cm The amount of ablated material is found to depend on the fluence at constant wavelength, and ,...

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Size Control of Gold Nanoparticles During Laser Ablation ,

Size Control of Gold Nanoparticles During Laser Ablation In Liquids With Different Functional Molecules Aissam Essaidi *1, M`Barek Chakif *1, Benjamin Schöps *1, Andreas Aumman *1, Shizhou Xiao *1, , Laser ablation, gold nanoparticles, size control, surfactant molecul...

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Laser Ablation Applied to Ore Deposit | GAC-MAC-IAH ,

Description : Laser ablation analysis has opened a wide horizon for the understanding and exploration of ore deposits This workshop will outline analytical methods and new developments in laser ablation analysis and application of the analysis to ore genesis...

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Gold-rich pyrite rims in a Carlin Au deposit: application ,

Laser ablation ICPMS can overcome these problems by providing low limits of detection at high spatial resolution With this in mind, a pilot , Origin of high-grade gold ore, source of ore fluid components, and genesis of the Meikle and neighbouring Carlin-type deposits, northern Carlin Trend, Nevada...

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Platinum-group elements in ores from the Kalmakyr porphyry ,

processing and refining of gold ores at a number of gold deposits, including the giant Cu–Au–Mo porphyry deposit of Kalmakyr in Uzbekistan However, PGE data on , In this paper, we present, for the first time, results from a geochemical and laser ablation ICP-MS ,...

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Excimer laser ablation of thin gold films on a quartz ,

Excimer laser ablation of thin gold films on a quartz crystal microbalance at various argon background pressures X Zhang, SS Chu, JR Ho, CP Grigoropoulos , a leading role in excimer laser ablation of thin gold films In situ reflectivity and scattering measurements of the gold-film...

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Size Control and Spectroscopic Characterization of ,

The results show a decrease of the gold particles' size up to 2 nm when thiol molecules are present in the liquid environment In summary, we observed that laser ablation of gold targets in thiol-alkane solutions leads to the formation of stable gold clusters with size smaller than those obtained in the corresponding pure alkane...

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Gold in the Brunswick No 12 volcanogenic massive sulfide ,

ARTICLE Gold in the Brunswick No 12 volcanogenic massive sulfide deposit, Bathurst Mining Camp, Canada: Evidence from bulk ore analysis and laser ablation...

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EndoVenous Laser Ablation - British Varicose Vein Centre

Advantages of EndoVenous Laser Ablation: Gold standard treatment of varicose veins (NICE approved) (99%) Keyhole treatment All varicose vein sizes can be treated Relatively painless with return to work within 24 hours Bespoke lasers generators for different size veins and anatomy Useful in treating primary and secondary varicose veins Thanks to advances in the treatment of varicose vein ....

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Femtosecond laser ablation behavior of gold, crystalline ,

The ablation behavior of gold, crystalline silicon, and fused silica was investigated using femtosecond pulse width laser radiation Two ablation regimes (ie thermal and non-thermal) were distinguished in the three target materials across the fluence range from 1 to 616 J cm −2 ...

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Surface Enhanced Raman Scattering (SERS) Studies of Gold ,

the NPs [21–23] To take advantage of these features, we have prepared gold (Au) and silver (Ag) NPs by laser ablation Colloidal suspensions of prepared NPs were deposited on gold-coated slides to immobilize them and to test them for potential use as substrates for the detection of explosives using surface enhanced Raman scattering (SERS)...

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Reshaping, Fragmentation, and Assembly of Gold ,

Apr 19, 2016· The interaction of pulse lasers with metal nanoparticles has been presented in a sequential manner, from the synthesis of Au NPs by ablation of a gold target via pulse laser irradiation, to reshaping, fragmentation and assembly of nanocrystals due to electromagnetic field and temperature enhancements upon excitation of LSPRs with laser puls...

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Laser ablation-inductively coupled plasma-mass ,

Laser ablation-inductively coupled plasma-mass spectrometry using a double-focusing sector field mass spectrometer of Mattauch-Herzog geometry and an array detector for the determination of platinum group metals and gold in NiS buttons obtained by fire assay of platiniferous or...

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Gold upgrading in metamorphosed massive sulfide ore ,

We conducted a systematic laser-ablation–inductively coupled plasma–mass spectrom etry (LA-ICP-MS) study on the gold distribution in fine-grained massive arseno-pyrite and pyrite ore, partially recrystallized arsenopyrite ore, and both arsenopyrite and pyrite porphyroblasts found in gold-rich veins...

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What is LA-ICP-MS? - Applied Spectra

LA-ICP-MS (Laser Ablation Inductively Coupled Plasma Mass Spectrometry) is a powerful analytical technology that enables highly sensitive elemental and isotopic analysis to be performed directly on solid sampl LA-ICP-MS begins with a laser beam focused on the sample surface to generate fine particles – a process known as Laser Ablation...

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Laser ablation-based one-step generation and bio ,

Recently, laser ablation of gold in a liquid environ-ment has been used for the production of AuNPs [16,17], using surfactants for growth quenching, result-ing in narrow nanoparticle size distributions[18] The advantages of laser-generated AuNPs include high purity in combination with unique surface characteristics The...

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Pulsed Laser Ablation of Gold Plate in Supercritical CO2

Pulsed Laser Ablation of Metal Plate in Supercritical Carbon Dioxide Motonobu Goto1*, Siti Machmudah1, , Nanosecond pulsed laser ablation (PLA) of copper and gold plate with an excitation , Laser ablation of copper and gold plates has been conducted in SCCO 2 at various...

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Gold finger - Wikipedia

Gold finger is a method of identifying an item made of gold based on the impurities or , the natural differences that coexist in ore geology and the difficulties of accurately analyzing trace elements , RJ Watling, HK Herbert, D Delev, ID Abell "Gold finger by laser ablation inductively coupled plasma mass spectrometry" ....

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Elemental Scientific Laser Ablation - nwrlasers

The industry's gold standard in 213 nm solid state laser ablation The NWR213 is an affordable yet no compromise instrument suitable for a wide range of applications It is a perfect complement to any ICP, ICP-MS, noble gas or stable isotope mass spectrometer...

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ESL NWR213 Laser Ablation System - Kenelec Scientific

The industry’s gold standard in 213nm solid state laser ablation The ESL NWR213™ is an affordable, yet no compromise instrument suitable for a wide range of applications...

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Nanosecond laser ablation of gold nanoparticle films ,

title = "Nanosecond laser ablation of gold nanoparticle films", abstract = "Ablation of self-assembled monolayer protected gold nanoparticle films on polyimide was explored using a nanosecond laser...

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Trace Element Analysis of Natural Gold by Laser Ablation ,

Laser ablation systems Two laser ablation systems were used in this study The Finnigan-MAT System 266™ Nd:YAG laser operates at a wavelength of 1064 nm which is frequency quadrupled to 266 nm The UV wavelength region was chosen because of the improved energy absorption characteristics in materials such as halite, quartz, and gold...

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Trace element analysis of native gold by laser ablation ,

Trace element analysis of native gold by laser ablation ICP-MS: A case study in greenstone-hosted quartz-carbonate vein ore deposits, Timmins, Ontario by Alejandro Velasquez BSc, National University of Colombia, Colombia 2006 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE COLLEGE OF ....

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Gold nanoparticles prepared by laser ablation in aqueous ,

Gold nanoparticles prepared by laser ablation in aqueous biocompatible solutions: assessment of safety and biological identity for nanomedicine applications Florian Correard , 1, 2 Ksenia Maximova , 3 Marie-Anne Estéve , 1, 2 Claude Villard , 1 Myriam Roy , 4 Ahmed Al-Kattan , 3 Marc Sentis , 3 Marc Gingras , 4 Andrei V Kabashin , 3 and Diane ....

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Femtosecond laser ablation-ICP-mass spectrometry analysis ,

Owing to the shorter time interval during which energy is delivered to the sample material, femtosecond (fs) laser ablation is preferable over nanosecond laser ablation for metallic sampl In this project, the influence of various laser parameters—beam diameter, repetition rate and laser fluence—on the abl 2010 Winter Conference on Plasma Spectrochemistry, Fort Myers, Florida, US...

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One-Step and Surfactant-Free Fabrication of Gold ,

Previous article in issue: Silica Xerogel Obtained by Ultrashort Laser Irradiation of Tetraethyl Orthosilicate , Next article in issue: Synthesis of Magnetic Nanoparticles by Ultrashort Pulsed Laser Ablation of Iron in Different Liquids...

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Laser Ablation Synthesis of Gold Selenides by using a Mass ,

In some gold ores, , Se n and Au m Se n clusters synthesized by laser ablation of selenium–gold mixtures and nanocomposit The lines refer to 1:1 and 2:1 stoichiometric ratios of gold and selenium Caption Laser ablation synthesis in solution We also attempted to synthesize gold selenides by LAS in the liquid phase ....

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