Laser-Induced ``Blow-Off'' Phenomena

Skeen, C. H.; York, C. M.

doi:10.1063/1.1651859

Cited by 61 publications

(22 citation statements)

References 7 publications

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“…Since the 1960s, it has been found that when an intense laser irradiates on a metal target, strong shock wave can be launched on the target surface due to the blow-off of the laser-induced high temperature plasma [1,2]. This is especially true in a confined geometry, in which the plasma is confined on the metal surface.…”

Section: Introductionmentioning

confidence: 97%

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Xuan

Lian

et al. 2015

Applied Surface Science

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Section: Introductionmentioning

confidence: 97%

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Xuan

Lian

et al. 2015

Applied Surface Science

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“…The use of lasers for the generation of shockwaves and acoustic waves in various materials, such as mercury, 4 aluminium 5,6 and copper, 7 has long been researched by materials scientists and physicists alike. [4][5][6]8 The fact that acoustic waves initiate desorption of low-energy neutral molecules from the opposite side of the irradiated foil 9 made experimental investigation of acoustic waves relevant to the field of mass spectrometry. LIAD was originally examined as a potentially useful desorption/ ionization method, much like MALDI, by Lindner and Seydel in 1985 and Lindner in 1991.…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Acoustic Desorption Mass Spectrometry

Dow

Wittrig

Kenttämaa

2012

Eur J Mass Spectrom (Chichester)

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Large thermally labile molecules were not amenable to mass spectrometric analysis until the development of atmospheric pressure evaporation/ionization methods, such as electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI), since attempts to evaporate these molecules by heating induces degradation of the sample. While ESI and MALDI are relatively soft desorption/ionization techniques, they are both limited to preferential ionization of acidic and basic analytes. This limitation has been the driving force for the development of other soft desorption/ionization techniques. One such method employs laser-induced acoustic desorption (LIAD) to evaporate neutral sample molecules into mass spectrometers. LIAD utilizes acoustic waves generated by a laser pulse in a thin metal foil. The acoustic waves travel through the foil and cause desorption of neutral molecules that have been deposited on the opposite side of the foil. One of the advantages of LIAD is that it desorbs low-energy molecules that can be ionized by a variety of methods, thus allowing the analysis of large molecules that are not amenable to ESI and MALDI. This review covers the generation of acoustic waves in foils via a laser pulse, the parameters affecting the generation of acoustic waves, possible mechanisms for desorption of neutral molecules, as well as the various uses of LIAD by mass spectrometrists. The conditions used to generate acoustic or stress waves in solid materials consist of three regimes: thermal, ablative, and constrained. Each regime is discussed, in addition to the mechanisms that lead to the ablation of the metal from the foil and generation of acoustic waves for two of the regimes. Previously proposed desorption mechanisms for LIAD are presented along with the flaws associated with some of them. Various experimental parameters, such as the exact characteristics of the laser pulse and foil used, are discussed. The internal and kinetic energy of the neutral desorbed molecules are also considered. Our research group has been instrumental in the development and use of LIAD. For example, we have systematically examined the influence of many parameters, such as the type of the foil and its thickness, as well as the analyte layer's thickness, on the efficiency of desorption of neutral molecules. The coupling of LIAD with different instruments and ionization techniques allows for broad use of LIAD in our research laboratories. The most important applications involve analytes that cannot be analyzed by using other mass spectrometric methods, such as large saturated hydrocarbons and heavy hydrocarbon fractions of petroleum. We also use LIAD to characterize lipids, peptides, and oligonucleotides. Fundamental research on the reactions of charged mono-, bi-, and polyradicals with biopolymers, especially oligonucleotides, also requires the use of LIAD, as well as thermochemical measurements for neutral biopolymers. These are but a few of the uses of LIAD in our research group.

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“…The study of the response of metals to laser shocks was first carried out by Askaryon and Morez [6] in 1963 and further developed by others [7][8][9][10]] to obtain Hugoniot data over a broad range of pressures. The shock pulse is created by focusing a laser beam on the surface of a material or a transparent ablator material that is placed on its surface.…”

Section: Introductionmentioning

confidence: 99%

Deformation Substructures and Their Transitions in Laser Shock–Compressed Copper-Aluminum Alloys

Meyers

Schneider

Jarmakani

et al. 2007

Metall Mater Trans A

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It is shown that the short pulse durations (0.1-10 ns) in laser shock compression ensure a rapid decay of the pulse and quenching of the shocked sample in times that are orders of magnitude lower than in conventional explosively driven plate impact experiments. Thus, laser compression, by virtue of a much more rapid cooling, enables the retention of a deformation structure closer to the one existing during shock. The smaller pulse length also decreases the propensity for localization.

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Laser-Induced ``Blow-Off'' Phenomena

Abstract: A high-power, Q-switched, neodymium-doped glass laser was used to create a blow-off plasma at surfaces of solid materials. Measurements of the ensuing stress pulses and the associated phenomena are discussed.

Cited by 61 publications

References 7 publications

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Laser-Induced Acoustic Desorption Mass Spectrometry

Deformation Substructures and Their Transitions in Laser Shock–Compressed Copper-Aluminum Alloys

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