研究目的
Investigating the influence of ion species detected in SIMS such as elemental ions and Cs cluster ions on the quantitative results of Si1?XGeX and Fe1?XNiX binary alloys.
研究成果
The use of MCs2+ was found to be the best quantitative results having a coefficient of determination (R2) of 0.9999 and 0.9990 and a slope of 1.0147 and 0.9802 from the results of magnetic sector SIMS and ToF-SIMS, respectively. The quantifications from APT and fs-LA-ICP-MS were in good agreement with the certified compositions and can be used complementarily with SIMS techniques.
研究不足
Quantitative SIMS analysis is limited by the matrix effect, which influences the sputter yield of an element in a compound and alters the secondary ionization yields.
1:Experimental Design and Method Selection:
Magnetic sector SIMS and ToF-SIMS were used to investigate the optimal conditions for quantification. The accuracy of the quantification using elemental ions and cluster ions in SIMS was compared with those using APT and fs-LA-ICP-MS.
2:Sample Selection and Data Sources:
Si1?XGeX and Fe1?XNiX films were prepared by the Korea Research Institute of Standards and Science. The concentrations of the Si1?XGeX samples were verified using RBS, and the Fe1?XNiX films were measured using ICP-AES.
3:List of Experimental Equipment and Materials:
IMS-4fE7 instrument (CAMECA), ToF-SIMS5 (IONTOF), femtosecond laser ablation instrument (J200, Applied Spectra), LEAP 4000X HR (CAMECA), dual-beam focused ion beam microscope (Helios Nanolab 600, FEI).
4:Experimental Procedures and Operational Workflow:
Depth profiles of the alloy films were obtained using magnetic sector SIMS and ToF-SIMS. The fs-LA-ICP-MS and APT were performed for comparison.
5:Data Analysis Methods:
The average intensity method was used to quantify the elements within the alloy films. The conversion factor of element i in the alloy reference sample was calculated from the average intensity of element i divided by the certified concentrations of the alloy reference sample.
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