The Influence of the Temperature on Positron Annihilation Lifetime Spectra in Porous Sol-Gel Glass Doped with Ag Nanoparticles

• Authors: M. Gorgol , B. Jasińska , R. Reisfeld , V. Levchenko
• Languages of publication: EN

Abstracts

EN

Silver nanoparticles with continuous size distribution from 10 to 20 nm were incorporated into porous glass produced using sol-gel technique. Positron annihilation lifetime spectroscopy was used to compare obtained material with an undoped reference glass. The positron annihilation lifetime spectroscopy measurement were made in a broad temperature range (from - 180C to 200°C). The experimental lifetime values were compared with the predictions of the extended Tao-Eldrup model of the temperature range. Experimental results for the reference material were in agreement with the model, except for a small discrepancy at low temperatures. In doped material substantial changes and non-monotonous temperature dependences of intensity and lifetime values were observed. Heating the material to 200C resulted in reorganization of the material structure.

Keywords

EN

78.70.Bj; 36.10.Dr; 65.60.+a; 61.43.Gt

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 61.43.Gt: Powders, porous materials
• 36.10.Dr: Positronium(see also 82.30.Gg Positronium chemistry)
• 65.60.+a: Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.

• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 3
• Pages: 778-781

Dates

published

2014-03

Contributors

author

M. Gorgol

• Institute of Physics, Maria Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

B. Jasińska

• Institute of Physics, Maria Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

R. Reisfeld

• Chemistry Institute, Hebrew University of Jerusalem, Givat-Ram, Jerusalem 91904, Israel

author

V. Levchenko

• Chemistry Institute, Hebrew University of Jerusalem, Givat-Ram, Jerusalem 91904, Israel

References

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Identifiers

DOI

10.12693/APhysPolA.125.778