Study on feasibility of variable energy slow-positron beams in characerization of arachidate Langmuir-Blodgett films

T. Marek, C. Szeles, E. Kiss, A. Vértes, K. G. Lynn

Research output: Article

3 Citations (Scopus)

Abstract

An extended set of arachidate Langmuir-Blodgett (LB-) films was studied by variable energy slow-positron beams. We studied the effect of the number of deposited monomolecular layers (MML), chemical composition, method of preparation and behaviour of the films in vacuum. The numeric analysis of the obtained S vs. E (W vs. E) curves showed that the method is capable to measure the thickness of the LB-films, and the measured Doppler-broadening parameters are sensitive to the chemical composition and the time spent in vacuum. The results confirmed the stability of salt-based LB-films in ultra-high vacuum (UHV) conditions and showed the desorption of pure acid films. Our results suggest that positron beams provide valuable complementary information to results obtained by other techniques.

Original languageEnglish
Pages (from-to)686-688
Number of pages3
JournalMaterials Science Forum
Volume255-257
Publication statusPublished - 1997

Fingerprint

Langmuir Blodgett films
Positrons
Langmuir-Blodgett films
positrons
Vacuum
chemical composition
Doppler effect
Ultrahigh vacuum
Chemical analysis
vacuum
energy
Monolayers
Desorption
Salts
ultrahigh vacuum
Acids
desorption
salts
preparation
acids

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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abstract = "An extended set of arachidate Langmuir-Blodgett (LB-) films was studied by variable energy slow-positron beams. We studied the effect of the number of deposited monomolecular layers (MML), chemical composition, method of preparation and behaviour of the films in vacuum. The numeric analysis of the obtained S vs. E (W vs. E) curves showed that the method is capable to measure the thickness of the LB-films, and the measured Doppler-broadening parameters are sensitive to the chemical composition and the time spent in vacuum. The results confirmed the stability of salt-based LB-films in ultra-high vacuum (UHV) conditions and showed the desorption of pure acid films. Our results suggest that positron beams provide valuable complementary information to results obtained by other techniques.",
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T1 - Study on feasibility of variable energy slow-positron beams in characerization of arachidate Langmuir-Blodgett films

AU - Marek, T.

AU - Szeles, C.

AU - Kiss, E.

AU - Vértes, A.

AU - Lynn, K. G.

PY - 1997

Y1 - 1997

N2 - An extended set of arachidate Langmuir-Blodgett (LB-) films was studied by variable energy slow-positron beams. We studied the effect of the number of deposited monomolecular layers (MML), chemical composition, method of preparation and behaviour of the films in vacuum. The numeric analysis of the obtained S vs. E (W vs. E) curves showed that the method is capable to measure the thickness of the LB-films, and the measured Doppler-broadening parameters are sensitive to the chemical composition and the time spent in vacuum. The results confirmed the stability of salt-based LB-films in ultra-high vacuum (UHV) conditions and showed the desorption of pure acid films. Our results suggest that positron beams provide valuable complementary information to results obtained by other techniques.

AB - An extended set of arachidate Langmuir-Blodgett (LB-) films was studied by variable energy slow-positron beams. We studied the effect of the number of deposited monomolecular layers (MML), chemical composition, method of preparation and behaviour of the films in vacuum. The numeric analysis of the obtained S vs. E (W vs. E) curves showed that the method is capable to measure the thickness of the LB-films, and the measured Doppler-broadening parameters are sensitive to the chemical composition and the time spent in vacuum. The results confirmed the stability of salt-based LB-films in ultra-high vacuum (UHV) conditions and showed the desorption of pure acid films. Our results suggest that positron beams provide valuable complementary information to results obtained by other techniques.

KW - Langmuir-Blodgett Films

KW - Positron Annihilation Spectroscopy

KW - Positron-Beams

KW - Thermal Desorption

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