Journal ArticleDOI
Thermoelectric power of annealed β-Ag2Se alloy thin films: temperature and size effects ― possibility of a new (β2) phase at low temperatures
V. Damodara Das,D. Karunakaran +1 more
TLDR
In this paper, the thermoelectric power of annealed β-Ag2Se thin films of different thicknesses has been measured both while heating and cooling by the integral method.Abstract:
Thermoelectric power of annealed β‐Ag2Se thin films of different thicknesses has been measured both while heating and cooling by the integral method. It is found that it remains practically constant (in β‐Ag2Se phase) during heating while it is a function of temperature while cooling. The thermoelectric power in both heating and cooling cycles is a function of inverse thickness of the films. The difference in behavior between Ag2Se films during heating and cooling is attributed to the possible transformation to monoclinic phase during cooling from the original orthorhombic phase during heating. The inverse thickness dependence has been explained by the size effect theories. Important material parameters like carrier concentration, Fermi energy, effective mass of carriers, and energy dependence of the mean free path have been evaluated for the β‐Ag2Se (orthorhombic) phase.read more
Citations
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Journal ArticleDOI
Ag2Se Quantum Dots with Tunable Emission in the Second Near-Infrared Window
TL;DR: By using 1-octanethiol as ligand to effectively balance the nucleation and growth, tuning the fluorescence of Ag₂Se QDs was successfully realized in the NIR-II window ranged from 1080 to 1330 nm, showing great potential for multicolor Nir-II fluorescence imaging in vivo.
Journal ArticleDOI
Hydrothermal synthesis of monodisperse Ag2Se nanoparticles in the presence of PVP and KI and their application as oligonucleotide labels
TL;DR: In this article, a hydrothermal reaction of AgNO3 with Na2SeSO3 in the presence of poly(vinyl pyrrolidone) (PVP) and KI at 180 °C for 20 h was used for the detection of DNA hybridization.
Journal ArticleDOI
Ab initio band structure calculations of the low-temperature phases of Ag2Se, Ag2Te and Ag3AuSe2
TL;DR: In this article, the authors performed band structure calculations for the low-temperature modifications of the silver chalcogenides β-Ag 2 Se, β -Ag 2 Te and the ternary compound δ-Ag 3 AuSe 2 by the local spherical wave (LSW) method.
Journal ArticleDOI
Structural stability enables high thermoelectric performance in room temperature Ag2Se
TL;DR: In this paper, the authors reveal the coexistence of a metastable and the main orthorhombic crystal structure in stoichiometric Ag2Se, and the formation of the metastable structure was found to be detrimental to the transport properties.
Journal ArticleDOI
Synthesis and electrochemical behavior of crystalline Ag2Se nanotubes
Sheng-Yi Zhang,Chun-Xia Fang,Wei Wei,Bao-Kang Jin,Yu-Peng Tian,Yu-Hua Shen,Jiaxiang Yang,Hong-Wen Gao +7 more
TL;DR: In this article, a template-engaged synthesis method was proposed for the preparation of crystalline nanotubes of silver selenide (Ag2Se), in which the trigonal Se nanotsubes as-prepared were used as template reagent.
References
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Journal ArticleDOI
Electrical Properties of β‐Ag2Te and β‐Ag2Se from 4.2° to 300°K
Richard Dalven,Robert J Gill +1 more
TL;DR: In this article, the electrical properties of β•Ag2Te and β'Ag2Se have been extended to 4.2°K and showed no indication of extrinsic carrier freeze-out or impurity banding.
Journal ArticleDOI
Metal-non-metal transition in silver chalcogenides
TL;DR: In this article, the authors review the crystallographic, optical, magnetic and transport properties of silver chalcogenides Ag2S and Ag2Se and show that in the low temperature β-phases, the influence of stoichiometry on the respective magnitude of ionic and electronic conductivities is important.
Journal ArticleDOI
Thermoelectric and Crystallographic Properties of Ag2Se
J. B. Conn,R. C. Taylor +1 more
TL;DR: In this paper, the Seebeck coefficient, resistivity, and thermal conductivity have been measured as a function of temperature, and the effect of doping with 30 different elements and compounds at different doping concentrations has been studied.
Journal ArticleDOI
Thermoelectric power of thin polycrystalline metal films in an effective mean free path model
TL;DR: In this paper, the theoretical expression for the thermoelectric power of polycrystalline metal films is derived from an effective Fuchs-Sondheimer conduction model, and a procedure is proposed to determine the variation in the electronic mean free path.
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