Structural study of evaporated amorphous As sub 4 S sub 4 films by x-ray-absorption fine structure

Journal Article · Wed May 15 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.11920· OSTI ID:5808255

Zhou, W; Paesler, M A; Sayers, D E ^[1]

---

1. Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202 (US)

X-ray-absorption fine-structure data show that films prepared by flash evaporation from As{sub 4}S{sub 4} source material possess the cagelike As{sub 4}S{sub 4} molecular structure. These As{sub 4}S{sub 4} molecular structures, especially in the as-deposited film, are quite disordered as compared to those in {ital c}-As{sub 4}S{sub 4}. The As{sub 4}S{sub 4} molecules in the films are either randomly packed or at least have a much lower correlation than in {ital c}-As{sub 4}S{sub 4}. After photosoaking of the annealed films, the structure does not show any significant changes, which indicates any structural modifications after photosoaking in nonstoichiometric {ital a}-As{sub {ital x}}S{sub 1{minus}{ital x}} (0.4{le}{ital x}{le}0.5) are not directly related to the presence of As{sub 4}S{sub 4} molecules.

• DOE Contract Number: FG05-89ER45384; AC02-76CH00016
• OSTI ID: 5808255
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:14; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ABSORPTION SPECTRA
AMORPHOUS STATE
ANNEALING
ARSENIC COMPOUNDS
ARSENIC SULFIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
DEPOSITION
FILMS
FLASH HEATING
HEAT TREATMENTS
HEATING
MOLECULAR STRUCTURE
SPECTRA
STOICHIOMETRY
SULFIDES
SULFUR COMPOUNDS
SURFACE COATING
X-RAY SPECTRA