|
|||||
|
|
Phase Separation in Chalcogenide Glasses: The System AgAsSSe |
|
| Authors: | S. Stehlik J. Kolar H. Haneda I. Sakaguchi M. Frumar T. Wagner |
| Affiliation: | 1. Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Cs. Legion's Sq. 565, Pardubice, 532 10 Czech Republic;2. Department of Applied Science for Electronics and Materials, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-kouen, Kasuga, Fukuoka, 816-8580 Japan National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 Japan;3. National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 Japan |
| Abstract: | 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. |
| Keywords: | |