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Raman spectra, structure and thermodynamic model of As2S3 - As2Se3 glasses
Authors: Liška Marek | Holubová Jana | Chromčíková Mária | Černošková Eva | Jakubíková Zuzana | Černošek Zdeněk
Year: 2010
Type of publication: článek v odborném periodiku
Name of source: Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B
Publisher name: Society of Glass Technology
Place: Sheffield
Page from-to: 1-6
Titles:
Language Name Abstract Keywords
cze Ramanova spektra, struktura a termodynamický model skel As2S3 - As2Se3 Struktura chalkogenidových skel pseudo-binárního systému As2S3-As2Se3 byla studována porovnáním výsledků termodynamického modelu Shakhmatkin & Vedishcheva s výsledky získanými analýzou spekter Ramanova rozptylu skel xAs2S3(1−x)As2Se3 (x=1;0,75;0,5;0,33;0,25 and 0) pomocí PCA (analýza hlavních komponent). Metoda PCA identifikovala tři nezávislé složky ve studované spektrální série. Korelační analýza ukázala lineární závislost mezi koncentrací Se a As2S2. Metodou Malfaita byly vypočteny dílčí Ramanova spektra (Se + As2S2), As2S3 a As2Se3. Experimentální spektra byla reprodukována s vynikající přesností. Ramanova spektra; struktura; termodynamický model;
eng Raman spectra, structure and thermodynamic model of As2S3 - As2Se3 glasses The structure of chalcogenide glasses of the pseudo-binary system As2S3–As2Se3 was investigated by comparison of the results of the thermodynamic model of Shakhmatkin and Vedishcheva with the results obtained by the analysis of Raman spectra of xAs2S3(1−x)As2Se3 (x=1;0,75;0,5;0,33;0,25 and 0) glasses performed by the PCA (principal component analysis) method and spectral decomposition by the method of Zakaznova-Herzog and Malfait. The PCA method identified three independent components in the studied spectral series. On the other hand, the thermodynamic modelling resulted in four components with significant abundance in the studied glasses, i.e. Se, As2S2, As2S3 a As2Se3. Finally, a correlation analysis showed a strong (correlation coefficient of 0,97) linear dependence between the concentrations of Se and As2S2. Using the method of Malfait, partial Raman spectra of (Se+As2S2), As2S3 and As2Se3 were calculated. The experimental spectra were reproduced with excellent accuracy. Raman spectra; structure; thermodynamic model; As2S3; As2Se3; glasses

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