Quantitative analysis of calcium and fluorine by high-sensitivity low-energy ion scattering: Calcium fluoride
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU137828" target="_blank" >RIV/00216305:26210/20:PU137828 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/sia.6889" target="_blank" >https://doi.org/10.1002/sia.6889</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/sia.6889" target="_blank" >10.1002/sia.6889</a>
Alternative languages
Result language
angličtina
Original language name
Quantitative analysis of calcium and fluorine by high-sensitivity low-energy ion scattering: Calcium fluoride
Original language description
Low-energy ion scattering (LEIS) probes the atomic composition of the outer surface. Well-defined reference samples are used for the quantitation. For elements like fluorine and calcium, it is not easy to find suitable, clean, and homogeneous references, since fluorine is a gas and calcium is a very reactive metal. In contrast to surface analytic techniques such as XPS, the extreme surface sensitivity of LEIS makes it difficult to use stable compounds like CaF(2)as reference, since these compounds are not homogeneous at the atomic scale. With LEIS, CaF(2)is not expected to show an atomic ratio F/Ca = 2.0. Thus, before CaF(2)can be used as reference, its atomic surface concentrations have to be determined. Here, 3-keV He(+)scattering by a LiF(001) single crystal, an evaporated layer of Ca, and a Cu foil are used as basic references. High-purity CaF(2)is available in two forms: a single crystal and a powder. For a practical reference, powders are preferred, since if bulk impurities segregate to the surface, they will be dispersed over a large surface area. It is found that both CaF2(111) and powder have similar F/Ca atomic ratios. This confirms the F termination for both samples. For the powder, the F and Ca signals are reduced by 0.77 +/- 0.03 in comparison with those for the single crystal. The atomic sensitivity factors and relative sensitivity factors have been determined for F, Ca, and Cu.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Surface and Interface Analysis
ISSN
0142-2421
e-ISSN
1096-9918
Volume of the periodical
52
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
4
Pages from-to
1000-1003
UT code for WoS article
000575056400001
EID of the result in the Scopus database
2-s2.0-85092077797