Unveiling surface charge on chalcogen atoms toward the high aspect-ratio colloidal growth of two-dimensional transition metal chalcogenides

Abstract

The steric effects of the ligands unveil the charged chalcogen sites which are induced by the ligand adsorption, thus promoting the anisotropic growth of two-dimensional transition metal chalcogenides (TMCs).

Molecular beam epitaxial growth of Sb2Te3–Bi2Te3 lateral heterostructures

“…Additionally, Bi 2 Te 3 has a hetero-epitaxial alliance with crystalline graphene, as discussed previously. In the next step, Sb and Te were introduced and Sb 2 Te 3 starts nucleating at the edge of the Bi 2 Te 3 and also on the graphene and grows laterally (figure 6(b)) plausibly because the edge facets have higher binding energy than that of basal {0001} [36][37][38]. In order to avoid any alloy formation between Bi and Sb, the substrate temperature was reduced by ∼25 • C. To grow lateral heterostructure, it is essential to nucleate the 2nd material successively at the edge of the 1st material [12,39]; the side edge atoms of Bi 2 Te 3 serve as nucleation sites for the Sb 2 Te 3 .…”

Directional effects in plasmon excitation and transition radiation from an anisotropic 2D material induced by a fast charged particle

“…However, before moving on to the analysis of the excitation of surface modes with a slow particle under oblique incidence, it is important to emphasize the rich variety of the topology of the surface modes in anisotropic 2D materials. [79][80][81][82] Namely, one may further refer to the azimuthal dependence of the excited modes (see also eqn (4) in ref. 79 and the discussion thereafter) and conclude the alteration of the transmitted and reflected waves (e.g.…”