laser ablation Articles
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Electrical properties in granular Co-ZrO2 thin films
Granular films composed of well-defined nanometric Co particles embedded in an insulating ZrZrO2 matrix were prepared by laser ablation in a wide range of Co concentration. The temperature-dependent resistivity depends very critically on the Co-volume fraction with percolation threshold in the range 0.45 Keywords: electrical properties, Co nanoparticles, nanocomposites, granular films, laser ...
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Experimental and theoretical investigation of the ablation mechanisms during femptosecond laser machining
In this work, a theoretical model based on molecular dynamics (MD) simulations and experimentation results of the femptosecond laser (FS) ablation, are applied for the description of ultrashort laser ablation of metals, with emphasis being given to the understanding of the material removal. The ablation of Fe with the use of 100 fs laser pulses, at a wavelength of 775 nm, is studied. ...
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Featured Article on Laser Ablation Chemical Analysis – LIBS, LA-ICP-MS/OES, and LAMIS
Laser ablation is a powerful approach to chemical analysis because of its versatility. It has advantages in chemical analysis including direct characterization of solids, no chemical procedure of dissolution, which reduces the risk of contamination or sample loss, analysis of very small samples not separable from solution analysis, and determination of spatial distribution of elemental ...
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What is laser ablation and why you need a nitrogen generator
Laser ablation is becoming a popular technique for direct solid sampling in analytical chemistry. But what exactly is laser ablation and why would you need a nitrogen generator for it? Laser ablation is a process in which a laser beam is used to remove a portion of mass from a sample, usually as a sampling method for isotopic or elemental analysis of a solid sample. The mass from the sampling ...
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Formation of photoluminescent properties inherent to silicon quantum dots
The analysis of original works devoted to preparation and investigation of nanocrystalline silicon (nc-Si) films containing Si quantum dots (QDs) that exhibit photoluminescence (PL) within the range 1.4 – 3.2 eV at room temperature is presented. Thin films were prepared by pulse laser deposition (PLD). Offered by authors doping these nc-Si films with gold in the growing process provided ...
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Laser–ablative nanostructuring of surfaces
We present an overview of laser methods for nanostructuring of surfaces that are in the focus of ongoing research activities of our Institute (LP3). The methods imply the removal of material by laser radiation to provide either spontaneous nanostructuring of laser–illuminated surface or its controlled nano–modification. Here, the desired relief or architecture is achieved through a proper ...
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The role of melano‐macrophage aggregates in the storage of mercury and other metals: An example from yelloweye rockfish (Sebastes ruberrimus)
Melano‐macrophage aggregates, collections of specialized cells of the innate immune system of fish, are considered a general biomarker for contaminant toxicity. To elucidate further the relationship between macrophage aggregates and metals exposure, yelloweye rockfish (Sebastes ruberrimus), a long‐lived species, were sampled from the east and west coasts of Prince of Wales Island, Alaska. ...
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Gas Phase Reaction Dynamics in Pulsed Laser Deposition
Pulsed laser deposition (PLD) has proved to be an outstanding technique for the deposition of complex oxide thin films due to its ability to congruently transfer the target composition to the deposited film. The deposition of many oxides is usually conducted using a pulsed KrF laser (λ= 248 nm corresponding to 4.99 eV/photon) with a pulse length of a few 10 ns in an O2 background gas. The ...
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Microchemical analysis of selenium in otoliths of two West Virginia fishes captured near mountaintop removal coal mining operations
Otoliths, calcified inner ear structures, were collected from creek chubs (Semotilus atromaculatus) and green sunfish (Lepomis cyanellus) living in mountaintop‐mining‐impacted and reference streams and analyzed for selenium (Se) content using laser ablation inductively coupled mass spectrometry (LA‐ICP‐MS). Significant differences in otolith Se were found between the two fish species. Results ...
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Analyses of trace elements on quartz surfaces in sulfidic mine tailings from Kristineberg (Sweden) a few years after remediation
Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has been applied to determine the elemental composition of the surface layer, as well as of the first interior layer, of quartz grains from the mine tailings from Kristineberg (northern Sweden) in order to determine concentration gradients between these two layers. The quartz grains were collected from the oxidized and ...
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Carbon nanotube membrane for water desalination
This is a review of carbon nanotube membranes with an emphasis on their water desalination applications. Particular attention is given to carbon nanotube preparation, types and properties. The concept of desalination in the context of carbon nanotubes is discussed. The different processes for the manufacture of carbon nanotube membranes are electric arc discharge, laser ablation and Chemical ...
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List of 10 Soil Metal Testing Methods
Soil testing has become a must-check item for environmental testing. In recent years, countries around the world have attached great importance to soil testing, which has led to great progress in soil testing technology. At the same time, countries around the world have increased their investment in soil metal testing, using advanced technologies such as spectroscopic analysis technology, ...
By Lifeasible
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ATOM encoders allow rapid, high-accuracy FPD inspection and repair - Case Study
Background South Korean flat-panel display (FPD) process equipment manufacturers have held a market-leading position for some time and are the driving force behind many of the recent advances seen in the manufacture of organic light emitting diode (OLED) and active-matrix light emitting diode (AMOLED) displays. TPC Motion (TPC), a well-known Korean manufacturer of motion-control components, has ...
By Renishaw plc
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TIMS or MC-ICP-MS – which do i need?
So, you have a need for precise isotope ratio measurement of solids, most likely metals, but perhaps you’re early in your career and not yet an expert in the instrumental techniques. You’ve already found out that thermal ionization MS (TIMS) and multi-collector ICP-MS (MC-ICP-MS) are the likely techniques of choice, but which should you choose? I work for Isotopx, a company the ...
By Isotopx Ltd
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Ensuring indoor air quality in hospitals and other healthcare facilities
Studies (1) have confirmed that even in modern healthcare facilities with mechanical ventilation and active scavenging systems, employee exposure to various gaseous compounds is still commonplace. By combining sufficient ventilation with waste gas scavenging and continuous air monitoring and sampling, safety professionals can substantially improve both patient and working staff safety in these ...
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