Jan 22, 2011 ... dc.description.abstract, Laser ablation has significant potential for ... dc. title, Elemental Fractionation In Ultraviolet Laser Ablation of ...
NASA Website
Jan 22, 2011 ... Title: Elemental Fractionation In Ultraviolet Laser Ablation of Igneous Silicate ... Abstract: Laser ablation has significant potential for ...
-element fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis is one is close to 1. Since laser ablation inductively coupled plasma mass spectro- metry (LA-ICP-MS) was �rst) are commonly used as an internal standard for in situ multi-element ...
E-print Network
Femtosecond laser ablation was investigated for direct solid sample chemical analysis. The phonon relaxation time in a solid is of the order of 100 fs, which is the same as the laser pulse duration. For such excitation, there should be little time for the matrix to experience a ''temperature'' during ...
Energy Citations Database
Noble gases measured for olivine, plagioclase and pyroxene separates, and by laser ablation on thin plate prepared from Y-000593 nakhlite indicate that plagioclase and/or mesostasis are the main carrier of elementally fractionated martian atmosphere.
NASA Astrophysics Data System (ADS)
Particle size effects and elemental fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) are investigated with nanosecond and femtosecond laser ablation, differential mobility analysis, and magnetic sector ICP-MS. Laser...
National Technical Information Service (NTIS)
... redness. The use of a potassium-titanyl-phosphate laser or pulse dye laser can target the erythema and reduce the uneven ... per year to maintain the appearance. Non-ablative laser technologies such as fractional laser treatments are non- ...
MedlinePLUS
Laser-induced breakdown spectroscopy (LIBS) has been used to map the distribution of particulate matter inside the plume created by laser ablation of a brass target. The spatial density distribution of the different components of the plume was determined in an attempt to reveal the mechanism of fractionation in the ...
PubMed
A new era in dermatological cosmetology, especially in the field of nonsurgical skin rejuvenation, started with ablative resurfacing, at first by carbon dioxide laser and later by Er:YAG or their combination. Although ablative lasers result in major improvements in photodamaged skin, the related postoperative ...
This paper describes the use of double-pulse laser ablation to improve ICP-MS internal precision (temporal relative standard deviation, %TRSD). Double pulse laser ablation offers reduced fractionation, increased sensitivity, and improved signal to noise ratios. The first pulse is used to ...
Surgery, burns, wounds, and inflammatory processes can lead to the development of a variety of different scars. Scars are categorized as hypertrophic, keloid, atrophic and acne scars. Different treatments are utilized for each scar type. The evolution of scar treatment has led to the advancement of lasers for the improvement of all scar types. Non-ablative ...
Fractional photothermolysis combines the benefits of fully ablative lasers with significantly reduced downtime and fewer complications. Skin is treated in a fractional manner, with narrow cylinders of tissue being thermally heated and normal adjacent skin left unaffected, and the fractional ...
A laser ablation-inductively coupled plasma-mass spectrometric (LA-ICPMS) technique utilizing a titanium-sapphire (TiS) femtosecond laser (fs-laser) has been developed for elemental and isotopic analysis. The signal intensity profile, depth of the ablation pit and level of elemental ...
study focuses on acmite, albite, augite, diopside, forsterite, and labradorite, silicate minerals that are relevant to Mars, Earth, the moon, and asteroids. ...
The Zn-to-Cu ratio in brass was measured by laser ablation inductively coupled plasma atomic emission spectroscopy. The influence of laser beam properties (pulse width, wavelength, and power density) on fractional laser ablation was investigated. The behavior of the Zn/Cu ...
Laser ablation is becoming a dominant technology for direct solid sampling in analytical chemistry. Laser ablation refers to the process in which an intense burst of energy delivered by a short laser pulse is used to sample (remove a portion of) a material. The advantages of ...
DOE Information Bridge
Skin resurfacing can be divided into nonablative, nonablative fractional, ablative fractional, and traditional ablative categories. Nonablative technologies have yielded inconsistent and unimpressive results, whereas ablative technologies, although generally clinically effective, are losing ...
Fractional laser resurfacing technology is one of those medical advanced technologies. It has bridged the gap between ablative lasers and non-ablative lasers. Fractional laser resurfacing is a new laser skin ...
Properties of Laser Ablation Products of Delrin with CO2 ... 4. TITLE AND SUBTITLE Properties of Laser Ablation Products of Delrin with CO2 Laser ...
DTIC Science & Technology
... CONTRACT NUMBER Ablation of Liquids for Laser Propulsion with TEA CO2 Laser (POSTPRINT) 5b. ... Ablation of Liquids for Laser Propulsion with ...
Laser ablation (LA) with inductively coupled plasma mass spectrometry (ICP-MS) has been demonstrated as a viable technology for sample characterization within the EM complex. Laser ablation systems have been set up at the Hanford Site, Savannah River Plant, the Pu immobilization program (MD), Los Alamos, and at ...
... Title : Experimental Scaling Laws for Mass-Ablation Rate, Ablation Pressure in Planar Laser-Produced Plasmas With Laser Intensity, Laser ...
Laser ablation particle plume compositions are characterized using inductively coupled plasma mass spectrometry (ICP/MS). This study evaluates the mass response characteristics peculiar to ICP/MS detection as a function of laser fluence and frequency. Evaluation of the ICP/MS mass response allows deductions to be made concerning how ...
Pantec Biosolutions AG presents a portable fractional ablative laser system based on a miniaturized diode pumped Er:YAG laser. The system can operate at repetition rates up to 500 Hz and has an incorporated beam deflection unit. It is smaller, lighter and cost efficient compared to systems based on lamp pumped ...
... Accession Number : ADD852830. Title : Laser Ablation of Doped Polymers: Transient Phenomena as the Ablation Threshold is Approached. ...
On the basis of consulting the home and abroad literatures in recent years, the research progress in the method of laser ablation solid sampling to the inductively coupled plasma source and its application in the analysis of material compositions are described. The present paper emphatically reviewed the influence of the laser-beam ...
... This presentation is Distribution A: Approved for public release, distribution unlimited Ablation of Liquids for Laser Propulsion ... Laser Ablation ...
Reproducible and sensitive elemental analysis of solid samples is a crucial task in areas of geology (e.g. microanalysis of fluid inclusions), material sciences, industrial quality control as well as in environmental, forensic and biological studies. To date the most versatile detection method is mass-spectroscopic multi-element analysis. In order to obtain reproducible results, this requires ...
A brief review of laser ablation mechanisms and applications is presented. Topics covered include polymer ablation, thin film deposition, tissue ablation, and chemical analysis.
A low energy and high repetition rate infrared femtosecond laser system was developed for direct trace elements analysis by laser ablation/ICPMS. This system provides improved analytical performances in terms of limits of detection, repeatability, elemental fractionation and depth profile analysis in comparison to ...
The effects of energy and pulse duration in laser ablation experiments have been investigated in the case of copper based alloys. Experiments were carried out near 530nm by using two laser sources with different widths (8 ns and 250 fs). The craters generated by lasers were examined and their characteristics were ...
Laser ablation of the palatine tonsils is a useful alternative to tonsillectomy in adults. Cryptic tonsillitis is a common problem causing recurrent infection, sore throat, and halitosis. Elimination and/or obliteration of surface pockets (crypts) of the palatine tonsils utilizing the CO2 laser was effective in 86 patients treated in ...
... beam and target uniformity requirements ... Descriptors : *LASER BEAMS, *ABLATION ... INTERACTIONS, HYDRODYNAMICS, LASERS, INTENSITY ...
... ADP012906 TITLE: Granulated Metallic Nanostructure Fabricated by Laser Ablation ... Granulated metallic nanostructure fabricated by laser ablation ...
... LASER BEAMS, *NUCLEAR FUSION, ABLATION, PLASMAS ... LASERS, MOMENTUM TRANSFER, PLASMA DIAGNOSTICS, FOILS(MATERIALS ...
Single pulse laser ablation sampling with inductively coupled plasma mass spectrometry (ICP-MS) was assessed for accurate chemical analysis. Elemental fractionation (e.g. Pb/U), the quantity of ablated mass (crater volume), ICP-MS intensity and the particle contribution (spike signal) during single pulse ...
Using fast imaging and atomic force microscopy, we demonstrate that the fraction of nanoparticles in ablation plumes produced by short pulse laser irradiation of metals is strongly altered when a second laser pulse of sufficiently large delay is applied. Comparing the results obtained for gold and copper, it is ...
BACKGROUND Fractional photothermolysis has been reported in the literature to improve pigmentary and textural changes associated with acne scarring. OBJECTIVE To review the literature for the treatment of acne scarring using nonablative fractional laser (NAFL) and ablative fractional ...
Ablative fractional resurfacing (AFR) creates microscopic vertical ablated channels that are surrounded by a thin layer of coagulated tissue, constituting the microscopic treatment zones (MTZs). AFR induces epidermal and dermal remodeling, which raises new possibilities for the treatment of a variety of skin conditions, primarily ...
Jan 22, 2011... of the Dynamics of Coupled Oscillator Arrays for Phase-Shifterless Beam Scanning ... System (EOS) CHEM Satellite, Beer, R.; Glavich, T.; Rider, D. ... 2000, Elemental Fractionation In Ultraviolet Laser Ablation of ...
... 73 UV Laser Ablation of Electronically Conductive Polymers by ... UV Laser Ablation of Electronically Conductive Polymers C NO00c4-82K-0612 ...
... SOLUTION ASSISTED LASER ABLATION SYNTHESIS OF ... Page 3. Solution assisted laser ablation synthesis of discrete aluminum nanoparticles ...
Development of laser ablation-electron impact ionization-miniature mass ... The instrumentation is based on the technologies of (i) laser ablation (LA) ...
A review of Laser Ablation Microthruster (LApT) tech- nology along with recent experimental ... sues, a laser ablation experiment has been setup at JPL. ...
... 90 Internal Explosion in Laser Ablation of Superconducting Targets by ... S. PIUNS NIM Internal Explosion in Laser Ablation of Superconducting Grant ...
Page 1. 1 Final Report Efficient Laser Ablation -Project AOARD 044033 Shigeaki Uchida ... 4. TITLE AND SUBTITLE Efficient Laser Ablation 5a. ...
... 239.18 Page 2. Comparison of Ablation Performance in Laser Lightcraft ... experiments on laser ablation of black and white Delrin [also called ...
In order to characterize the laser ablation process as it relates to the deposition of high T/sub c/ superconducting thin films, optical emission spectra produced during ArF excimer laser ablation of the high T/sub c/ superconductor YBa/sub 2/Cu/sub 3/O/sub 7/ were studied. The population of excited states within ...
Laser ablation of a silver plate immersed in virgin coconut oil was carried out for fabrication of silver nanoparticles. A Nd:YAG laser at wavelengths of 1064 nm was used for ablation of the plate at different times. The virgin coconut oil allowed formation of nanoparticles with well-dispersed, uniform particle ...
PubMed Central
... Direct Impulse Measurements of Ablation Processes from ... Of particular interest are the forces due to processes of laser ablation. ...
Photo-damaged skin is characterized by major alterations of the extracellular matrix and collagen network, leading to clinically obvious signs of skin aging. UV radiation increases the levels of matrix metalloproteinase (MMP) 1, which initiates the cleavage of fibrillar collagen types I and III. The developing collagen fragments are further degraded by MMPs 2 and 9. Various ...
... Products of Delrin with CO2 Laser. ... Descriptors : *CARBON DIOXIDE LASERS, *ABLATIVE MATERIALS ... DEPOSITION, LASER APPLICATIONS ...
This is a case report of a 27-year-old Korean woman with Fitzpatrick skin type IV presenting with refractory arcuate hyperpigmentation, which developed after non-ablative 1450-nm diode laser therapy. The refractory arcuate hyperpigmentation was unresponsive to the use of Q-switched lasers, vitamin C iontophoresis, and a bleaching ...
Scars cause significant impact on the quality of life of the affected patients and compel the search for more effective treatments. Ablative laser skin resurfacing, either alone or in combination with other modalities, is the gold standard for treating various scars but is associated with prolonged recovery and many side effects. To address these ...
A new laser ablation technique combined with a chemical evaporation reaction has been developed for elemental ratio analysis of solid samples using an inductively coupled plasma mass spectrometer (ICPMS). Using a chemically assisted laser ablation (CIA) technique developed in this study, analytical repeatability of ...
Dermatologic laser therapy is a rapidly-changing field with many new innovations. One of the most important is the introduction of fractional photothermolysis. This method is established for skin rejuvenation and acne scars; both the original non-ablative devices and newer ablative ones are available. While its ...
This article deals with the technical characteristics of fractional light devices, fractional lasers, and light sources that cause their biologic effects by increasing the temperature of the target tissues to the point where the target is either killed, or in other cases where the temperature of the target tissue is increased to the ...
Laser driven flyers are produced on the interaction of a laser pulse with a thin film of metal. When an Nd:YAG laser is focussed through a fused silica substrate onto a 5 micron layer of aluminium, a fraction of the metal is ablated. This causes the remaining aluminium to be punched from the ...
This thesis discusses the following on resonant holographic measurements of laser ablation plume expansion: Introduction to laser ablation; applications of laser ablation; The study of plume expansion; holographic interferometry; resonant holographic inte...
Ultrafast light-induced dichroism in silver nanoparticles is studied. Two differently prepared colloids are examined: one sample has a broad distribution of sizes and shapes of silver nanoparticles, while the second sample, which is processed by laser ablation, presents a more uniform size and shape distribution (greater fraction of ...
The drive to attain cosmetic facial enhancement with minimal risk and rapid recovery has inspired the field of nonsurgical skin rejuvenation. Laser resurfacing was introduced in the 1980s with continuous wave carbon dioxide (CO(2)) lasers; however, because of a high rate of side effects, including scarring, short-pulse, high-peak power, and rapidly ...
... Accession Number : ADD454549. Title : WAVELENGTH-DEPENDENT LASER ABLATION OF DIAMOND FILMS. Corporate Author : ...
... Accession Number : ADA102234. Title : Laser Ablation and Resonance Ionization Spectroscopy (LARIS) for Trace Analysis of Solids. ...
... Title : LASER ABLATION IN MATERIALS PROCESSING: FUNDAMENTALS AND APPLICATIONS; SYMPOSIUM HELD DECEMBER 1-4, 1992 ...
... Accession Number : ADD852990. Title : Excimer Laser Induced Ablation of Polyetheretherketone, Polyimide, and Polytetrafluoroethylene. ...
... Accession Number : ADD852771. Title : Excimer Laser Ablation of Polyimide. Descriptive Note : Journal article,. Corporate ...
... Accession Number : ADD853930. Title : Excimer Laser Ablation of Fused Silica. Descriptive Note : Journal article,. Corporate ...
