A Stanene, is a two-dimensional material composed of tin atoms arranged in single hexagonal layer, manner similar to graphene. First principle studies based on density functional theory were performed investigate the effects hydrogenation and Al/P doping electronic structure magnetic properties stanene. Hydrogenation opens bandgap stanene changes it from nonmagnetic ferromagnetic through H 1s s...

Stanene, the two-dimensional (2D) monolayer form of tin, has been predicted to be a 2D topological insulator due its large spin-orbit interaction. However, clear experimental demonstration stanene's topologically nontrivial properties eluded observation, in part because difficulty choosing substrate on which stanene will remain nontrivial. In this paper, we present first-principles density func...

Future generation optical networks are expected to provide ultra broadband optical communication to continuously growing fiber transmission requirements. In this context, Bismuth and Erbium (Bi/Er) codoped glass fibers symbolize an important aspect as it has offered a promising active laser medium for ultra-bandwidth communication. Many studies have been demonstrated that Bi/Er codoped glass op...

Based on first principles calculations and self-consistent solution of the linearized Boltzmann-Peierls equation for phonon transport approach within a three-phonon scattering framework, we characterize lattice thermal conductivities k of freestanding silicene, germanene and stanene under different isotropic tensile strains and temperatures. We find a strong size dependence of k for silicene wi...

Two dimensional nanostructures of group IV elements have attracted a great deal of attention because of their fundamental and technological applications. A graphene-like single layer of tin atoms, commonly called stanene, has recently been predicted to behave like a quantum spin Hall insulator. Here we report the atomic structure, stability and electron transport properties of stanene stabilize...

We report a novel method to prepare silicon quantum dots (Si-QDs) having excellent stability in water without organic-ligands by simultaneously doping phosphorus and boron. The codoped Si-QDs in water exhibit bright size-tunable luminescence in a biological window. The luminescence of codoped Si-QDs is very stable under continuous photoexcitation in water.

Se4+ and N3- ions were used as codopants to enhance the photocatalytic activity of TiO₂ under sunlight irradiation. The Se/N codoped photocatalysts were prepared through a simple wet-impregnation method followed by heat treatment using SeCl₄ and urea as the dopant sources. The prepared photocatalysts were well characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-...

Novel properties are observed to arise at 2d level, which is typically absent in their bulk counterparts. Graphene, the most widely studied 2D material. Recently, other group-IV materials, silicene, germanene and stanene, have been realized by epitaxial growth on substrates attracted tremendous interest due extraordinary properties. The discovery of a buckled monolayer tin atoms arranged honeyc...

Silicene, germanene and stanene likely to graphene are atomic thick material with interesting properties. We employed first-principles density functional theory (DFT) calculations to investigate and compare the interaction of Na or Li ions on these films. We first identified the most stable binding sites and their corresponding binding energies for a single Na or Li adatom on the considered mem...