Thermoelectric Power of Silver Telluride Thin Films and its Thermal Conductivity Applications

The hydrothermal technique was used to create straight single crystal silver telluride nanowires with a diameter of around 200 nm and a length of up to micrometers of decades. There has been no template or surfactant used in the process. As-synthesized products are high purity and well-crystallized, confirmed by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectrum, transmission electron microscopy (TEM), and a high-resolution SAED pattern. Differential scanning calorimetry was used to observe the reversible structural phase shift from the low-temperature monoclinic structure to the high-temperature face-centered cubic structure. Furthermore, the dramatic drop in electrical current in a single nanowire at the phase transition temperature is revealed, paving the way for future research into the manufacturing of one-dimensional nanoscale devices. Silver telluride (Ag2Te) has large thermoelectric coefficients and it was tested by using resistor graph and calculated the values of it, thermal conductivity and Seebeck coefficient were discussed with respect to the temperature of thin films. Semiconductors were superior thermoelectric material due to higher ratio of electrical and thermal conductivities. Therefore, the AgTe thin films deposited on indium tin oxide (ITO) substrates were employed, thermoelectric power and thermal conductivity measurements, respectively.

Silver telluride nanoparticles as biocompatible and enhanced contrast agents for X-ray imaging: an in vivo breast cancer screening study

Silver telluride nanoparticles (Ag2Te NPs) show good biocompatibility, enhanced contrast, and blood pool agent characteristics and thus could be used contrast agents for breast cancer screening.

Simple Synthesis of Crooked Ag2Te Nanotubes and Their Photoelectrical Properties

In recent decades, silver telluride has been considered as an excellent thermoelectric material, but its photoelectric conversion performance has received little attention. In this study, we synthesized uniform crooked Ag2Te...

Necklace-like ultrathin silver telluride nanowire films and their reversible structural phase transition

Novel necklace-like Ag2Te nanowires with reversible structural phase transition at low temperature have been synthesized by a one-pot method. The assembled necklace-like Ag2Te nanowire film can be applied in electronic sensor devices.

Mineralogy of precious metals in ores of the Yubileinoe porphyry gold deposit (Kazakhstan)

Gold and silver mineralogy is studied in ores of the Yubileinoe porphyry gold deposit (Kazakhstan). Native gold is the major gold mineral. Its fneness varies from 970‰ in magnetite-hematite assemblage to 733–860‰ in pyrite-chalcopyrite assemblage. Silver occurs as admixture in native gold and, occasionally, as silver telluride. Native gold is associated with bi and Pb minerals: rucklidgeite, galenaclaustalite, and tetradymite-kawazulite. According to chlorite geothermometry, the Au, Ag and bi minerals precipitated at temperatures of 250-230 °С. These features are typical of the porphyry gold deposits worldwide. Figures 5. Tables 3. References 17.

Lingbaoite, AgTe3, a new silver telluride from the Xiaoqinling gold district, central China

Lingbaoite, AgTe3, is a new silver telluride discovered in the S60 gold-bearing quartz vein, Xiaoqinling gold district, central China. The new mineral is named after Lingbao city, the municipality of which covers a major part of the Xiaoqinling gold district. Lingbaoite is only microscopically visible and occurs within pyrite as small composite inclusions (<50 μm) that commonly consist of lingbaoite, sylvanite, and chalcopyrite, and locally of bornite, galena, altaite, and stützite. The largest lingbaoite grain is about 30 × 12 μm in size. At least two stages of gold and telluride mineralization are recognized in the lingbaoite-bearing sample set. The first stage is characterized by the deposition of lingbaoite, native tellurium, and sylvanite, within the commonly observed mineral assemblages of lingbaoite + sylvanite + chalcopyrite and sylvanite + native tellurium + stützite. The second stage is characterized by the deposition of Bi-bearing minerals and native gold, within the commonly observed mineral assemblages of rucklidgeite + altaite + volynskite ± hessite ± petzite and rucklidgeite + gold ± altaite. Lingbaoite is opaque and exhibits no internal reflections. In plane-polarized reflected light, lingbaoite shows a creamy yellow reflection color. The calculated density is 7.06 g/cm3. Seventeen WDS spot analyses from 17 different lingbaoite grains gave an empirical formula of Ag0.946Fe0.134Cu0.008Pb0.003 Te2.841S0.067. When considering Ag and Te as the only two essential structural components, the empirical formula is Ag1.00Te3.00. The EBSD and SAED data confirm the structural identity of lingbaoite and synthetic AgTe3. Synthetic AgTe3 is trigonal, space group R3m, with a = 8.645 Å, c = 5.272 Å, V = 341.2 Å3, and Z = 3. The unit-cell parameters of lingbaoite are: a = 8.60 (5) Å, c = 5.40 (18) Å, V = 346 (9) Å3, and Z = 3. Synthetic AgTe3, and by analog lingbaoite, can be viewed as silver-stabilized cubic tellurium, which is an ordered (1:3 Ag:Te) analog of the α-polonium structure (i.e., simple cubic crystal structure). Synthetic AgTe3 becomes a stable phase at above 0.4 GPa, but can also occur in a metastable state at atmospheric pressure. Lingbaoite probably formed through the cooling of polymetallic melt droplets within the hydrothermal system. Lingbaoite and associated minerals (e.g., sylvanite, native tellurium) reveal a previously unrecognized but perhaps common magmatic-hydrothermal process in the Xiaoqinling gold district, which precedes the precipitation of native gold, suggesting that gold mineralization in the Xiaoqinling gold district involves multiple superimposed processes of gold enrichment.