Elucidating the structural properties of gold selenide nanostructures

Abstract

Noble transition metal chalcogenide gold selenide is a relatively unexplored layered material.

Characterization of synthetic and natural gold chalcogenides by electron microprobe analysis, X‐ray powder diffraction, and Raman spectroscopic methods

“…Our data (Figure 6a) correlate well with the calculated and experimental Raman spectra of gold selenide AuSe from. [ 39 ] Most likely, AuSe synthetic phase from this study consists of a mixture of α‐ and β‐polymorphs.…”

“…Our data (Figure 6a) correlate well with the calculated and F I G U R E 4 Raman spectra of Au 3 X 10 : (a) synthetic phases with different Te, Se, S ratios (Table 1, experiments 4, 7, 8, and 13), (b) natural phases (Gaching deposit, Kamchatka, Russia) [17] experimental Raman spectra of gold selenide AuSe from. [39] Most likely, AuSe synthetic phase from this study consists of a mixture of αand β-polymorphs.…”

Quasi one-dimensional van der Waals gold selenide with strong interchain interaction and giant magnetoresistance

“…These essential bonds give rise to the formation of 1D atomic chain along the direction of the monoclinic b-axis, and these 1D chains are stacked together along the a-axis and c-axis, forming quasi 1D AuSe. [12]. The interchain binding energies along the c-axis and a-axis directions are À0.39 and À0.68 eV, respectively.…”

“…Quasi 1D AuSe atomic chains are connected by covalent bonding along the axial direction. These 1D AuSe atomic chains can be stacked together, forming 1D needle-like nanoribbon or 2D nanosheet structure [10][11][12][13][14][15][16][17]. The difference between strong intrachain chemical bonding and interchain interaction leads to high anisotropy in the 1D vdWs material, resulting in thoroughly different properties compared with typical 2D layered materials and 1D nanotubes/nanowires [18].…”

Low thermal conductivity and high performance anisotropic thermoelectric properties of XSe (X = Cu, Ag, Au) monolayers

“…b-Gold selenide, a relatively unexplored layered material, has been synthesized by colloidal synthesis, which is a mild method with inexpensive equipment, and scaling-up is easily achievable. 12,13 It can be noted that its bulk phase compound was synthesized in 1968 and exhibits metallic properties. 14 Owing to the strong interlayer quantum confinement effect, 15 the b-AuSe monolayer has an indirect bandgap (1.82 eV); meanwhile, it exhibits a tunable bandgap and outstanding optical absorption coefficient offering perspectives for electric devices and photovoltaic solar cells.…”