Structural defects in transition metal dichalcogenide core-shell architectures

Curvature presents a powerful approach to design atomic structure and tailor material properties in atomically thin transition metal dichalcogenides (TMDs). The emerging TMD core-shell architecture, which multilayer shell encapsulates curved nanoparticle core, the opportunity controllably induce defects into crystal by strategically constructing shape of underlying core. However, harnessing this potential platform first requires robust characterization unique structural features present architecture. To end, transmission electron microscopy (TEM) scanning TEM (STEM) are particularly tools for direct 2D materials with high spatial resolution precision. Here, we reveal describe inherently We develop comprehensive framework classify observed discuss origins implications variations. utilize S/TEM relationship between their associated strain fields. Furthermore, demonstrate that shells often possess wide range interlayer spacings varied distribution. By exploring rich array provide an important foundation ultimately exotic TMDs through sophisticated defect engineering.