Computer simulations of laser ablation sample introduction for plasma-source elemental microanalysis

2006 ◽  
Vol 21 (11) ◽  
pp. 1161 ◽  
Author(s):  
Davide Bleiner ◽  
Annemie Bogaerts
Keyword(s):  
Laser Ablation ◽  
Computer Simulations ◽  
Plasma Source ◽  
Sample Introduction ◽  
Elemental Microanalysis

Microstructure of Agglomerates of Nanometer Particles

1995 ◽  
Vol 380 ◽  
Author(s):  
Alfred P. Weber ◽  
James D. Thorne ◽  
Sheldon K. Friedlander
Keyword(s):  
Fractal Dimension ◽  
Laser Ablation ◽  
Coordination Number ◽  
Computer Simulations ◽  
Large Fraction ◽  
Low Density ◽  
Nanometer Particles ◽  
The Relationship

ABSTRACTThe microstructure of an agglomerate can be characterized by the coordination number. The relationship between the fractal dimension and the coordination number of agglomerates of nanometer particles was investigated in experiments and computer simulations. The results for silver agglomerates formed by laser ablation agreed well with the simulations. The coordination number is low for low density fractals because of the large fraction of surface particles which have fewer bonds. The sensitivity of the coordination number to the fractal dimension increases with increasing fractal dimension.

scholarly journals Emission characteristics of laser ablation-hollow cathode glow discharge spectral source

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Stefan Karatodorov ◽  
Valentin Mihailov ◽  
Margarita Grozeva
Keyword(s):  
Laser Ablation ◽  
Glow Discharge ◽  
Hollow Cathode ◽  
Discharge Current ◽  
Spatial Separation ◽  
Gas Pressure ◽  
Hollow Cathode Discharge ◽  
Sample Introduction ◽  
Emission Characteristics ◽  
Sample Material

AbstractThe emission characteristics of a scheme combining laser ablation as sample introduction source and hollow cathode discharge as excitation source are presented. The spatial separation of the sample material introduction by laser ablation and hollow cathode excitation is achieved by optimizing the gas pressure and the sample-cathode gap length. At these conditions the discharge current is maximized to enhance the analytical lines intensity.

Computer Simulations of Laser Ablation of Molecular Substrates

2003 ◽  
Vol 103 (2) ◽  
pp. 321-348 ◽  
Author(s):  
Leonid V. Zhigilei ◽  
Elodie Leveugle ◽  
Barbara J. Garrison ◽  
Yaroslava G. Yingling ◽  
Michael I. Zeifman
Keyword(s):  
Laser Ablation ◽  
Computer Simulations ◽  
Molecular Substrates

Laser-ablation sampling for inductively coupled plasma distance-of-flight mass spectrometry

2015 ◽  
Vol 30 (1) ◽  
pp. 139-147 ◽  
Author(s):  
Alexander Gundlach-Graham ◽  
Elise A. Dennis ◽  
Steven J. Ray ◽  
Christie G. Enke ◽  
Charles J. Barinaga ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Inductively Coupled Plasma ◽  
Sample Introduction ◽  
Inductively Coupled ◽  
Flight Mass Spectrometry

Laser-ablation (LA) sample introduction is combined with a new simultaneous multi-element determining, velocity-based ICPMS approach called distance-of-flight mass spectrometry (DOFMS).

Fractionation Effects in Laser Ablation Inductively Coupled Plasma Mass Spectrometry

1995 ◽  
Vol 49 (11) ◽  
pp. 1652-1660 ◽  
Author(s):  
Evan F. Cromwell ◽  
Peter Arrowsmith
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Inductively Coupled Plasma ◽  
Laser Pulses ◽  
Sample Surface ◽  
Sample Introduction ◽  
Matrix Analysis ◽  
Near Surface ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

Aspects of laser ablation sample introduction for inductively coupled plasma mass spectrometry (ICPMS) have been investigated. For some analytes, nonrepresentative subsampling or fractionation is the major cause of poor analytical accuracy. Fractionation is prevalent for ablation at low laser fluence and with multiple laser pulses incident on the same area of the sample surface. The fluence dependence is explained by the relative depths of the melt- and heat-affected zones. Volatile analyte elements that are segregated in the bulk, or become segregated as the ablation zone is heated, are most prone to fractionation. For metal alloys, the extent of fractionation can be qualitatively predicted from the binary-phase diagram of the corresponding analyte matrix. Analysis by Auger electron spectroscopy showed that miscible elements may also be segregated at the near surface, with the extent of segregation growing with multiple laser pulses. Such segregation results in increased fractionation.

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