197Au Mössbauer Spectroscopic Study of the Ternary Systems (Ag,Au)2X (X = S and Se)

Sakai, Hiroshi; Ando, Manabu; Ichiba, Sumio; Maeda, Yutaka

doi:10.1246/cl.1991.223

Cited by 12 publications

(2 citation statements)

References 5 publications

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“…Ag-Au chalcogenides, including silver(I) thioaurate(I) AgAuS, are of interest in the investigation of phase transformations in the Ag-Au-chalcogen system. 1 The compounds of AgAuS composition have been described in two modifications: a high-temperature cubic primitive phase 2 (a = 5.01 Å) existing at temperatures higher than 307 °C and a low-temperature phase stable under normal conditions. There are several opinions about the metrics and symmetry of the lowtemperature modification.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and crystal structure of silver–gold sulfide AgAuS. Four-fold interpenetrated three-dimensional [(Au,Ag)10S8]-networks

et al. 2014

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Crystals of the silver(I) thioaurate(I), AgAuS, were obtained by fusing the elements in stoichiometric amounts. The X-ray diffraction analysis showed that the synthesized phase AgAuS represents a new structural type. The unit cell parameters are a = 13.4235(3), c = 9.0873(4) Å, V = 1418.07(6) Å 3 and Z = 24, and the space group is R3 ¯m. The sublattice of sulfur atoms has a strongly distorted body-centered cubic packing. All Au atoms are in a typical linear coordination with sulfur ones. Three-quarters of the silver atoms are surrounded by distorted tetrahedra of sulfur atoms, while the rest of the silver atoms are involved in a linear motif typical of Au atoms as well. The resulting motif is composed of four-fold interpenetrating networks of linearly coordinated metals with 2-and 4-connected sulfur atoms: [Au 8 [2] Ag 2 [2] S 6(2) S 2]. The formula of AgAuS can be represented as Ag 24[4][Au 8 [2] Ag 2 [2] S 8 ] 4 . The features of the AgAuS structure suggest the possibility of wide variation in the Au : Ag ratio.

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Section: Introductionmentioning

confidence: 99%

Synthesis and crystal structure of silver–gold sulfide AgAuS. Four-fold interpenetrated three-dimensional [(Au,Ag)10S8]-networks

et al. 2014

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“…According to the X-ray diffraction (XRD) patterns in Figure 3b and previous reports, the nanoparticles consist of Au and complex salts, namely Au 2 S, AuAgS, [35][36][37][38][39] and Ag 3 AuS 2 . 40,41 Although these experimental data from XPS and XRD were acquired by averaged over large areas of these nanoparticls, Figure 4 shows two different phases in the formed nanorods indicating the formation of a core-shell structure. Furthermore, high-resolution transmission electron microscopy (HR-TEM) confirms that both the Au core and shell are crystalline.…”

Section: Research Articlementioning

confidence: 99%

Preparation of Controllable Core−Shell Gold Nanoparticles and Its Application in Detection of Silver Ions

Huang

Liu

et al. 2011

ACS Appl. Mater. Interfaces

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We report a novel shell technique to prepare controllable core-shell nanoparticles. In this technique, the shell is formed when the core reacts with metal ions and Na(2)S(2)O(3) and the size of the core and thickness of the shell can be controlled. Transmission electron microscopy and X-ray diffraction reveal that the shell consists of insoluble complex salts comprising Au(2)S, AuAgS, and Ag(3)AuS(2). The resulting core-shell nanoparticles obtained at different reaction stages demonstrate that the formation of Au(2)S, AuAgS, and Ag(3)AuS(2) shell proceeds from the outside. The morphological evolution of the particles changes significantly with reaction time demonstrating that formation of the shell results from diffusion in the solid shell. The core-shell nanoparticles produced by this technique can be used as nanosensors to detect Ag(+) in aqueous media with high selectivity and sensitivity. The excellent selectivity for Ag(+) is demonstrated by comparing the response to other metal ions. In addition, our evaluation indicates that gold nanorods offer higher sensitivity than gold nanospheres.

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Mössbauer-Active Transition Metals Other than Iron

Gütlich

Bill²,

Trautwein

2010

Mössbauer Spectroscopy and Transition Metal Chemistry

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197Au Mössbauer Spectroscopic Study of the Ternary Systems (Ag,Au)2X (X = S and Se)

Abstract: 197Au Mössbauer spectroscopy has been applied for the low-temperature β-phases of ternary systems, Ag2−xAuxX (X = S, and Se; x = 0.2 and 0.5). The nature of linear X–Au–X bonds present in these systems is discussed on the basis of the Mössbauer data and the bond distances.

Cited by 12 publications

References 5 publications

Synthesis and crystal structure of silver–gold sulfide AgAuS. Four-fold interpenetrated three-dimensional [(Au,Ag)10S8]-networks

Synthesis and crystal structure of silver–gold sulfide AgAuS. Four-fold interpenetrated three-dimensional [(Au,Ag)10S8]-networks

Preparation of Controllable Core−Shell Gold Nanoparticles and Its Application in Detection of Silver Ions

Mössbauer-Active Transition Metals Other than Iron

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