Phase Separation in Chalcogenide Glasses: The System AgAsSSe

We report on visualization of a phase separation in Agx(As0.33S0.67)100−x and Agx(As0.33S0.335Se0.335)100−x chalcogenide glasses by means of atomic force microscopy (AFM). Sufficient topographical contrast (~20 nm) was achieved by selective polishing of a phase‐separated sample (Ag‐poor, Ag‐rich reg...

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Bibliographic Details
Published in:International journal of applied glass science 2011-12, Vol.2 (4), p.301-307
Main Authors: Stehlik, S., Kolar, J., Haneda, H., Sakaguchi, I., Frumar, M., Wagner, T.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Boundaries
Chalcogenides
Glass
Immiscibility
Phase separation
Polishing
Silver
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Summary:We report on visualization of a phase separation in Agx(As0.33S0.67)100−x and Agx(As0.33S0.335Se0.335)100−x chalcogenide glasses by means of atomic force microscopy (AFM). Sufficient topographical contrast (~20 nm) was achieved by selective polishing of a phase‐separated sample (Ag‐poor, Ag‐rich regions) and phase separation occurred within 0.5–20 at.% Ag and 2–18 at.% Ag in Agx(As0.33S0.67)100−x and Agx(As0.33S0.335Se0.335)100−x systems, respectively. Homogenous regions were observed below and above the phase separation lower and upper limits. Direct comparison of scanning electron microscopy and atomic force microscopy sensitivity of phase separation detection is shown. In addition, concentration of silver in particular phases of AgAsS system was evaluated by NanoSIMS (secondary ion mass spectroscopy) and very similar concentration of silver was detected in the phases at boundaries of immiscibility region.
ISSN:2041-1286
2041-1294
DOI:10.1111/j.2041-1294.2011.00065.x