Tunable-Diameter Nanoscrolls from Janus WSSe/WSe<sub>2</sub> Heterostructures.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40985926.
- Also identified by DOI 10.1021/acsnano.5c10877 and PMC identifier 12509307.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Janus transition metal dichalcogenide (TMD) nanoscrolls have recently emerged as promising nanostructures for studying curvature- and chirality-dependent physical phenomena. However, systematic strategies to fabricate multilayer Janus TMD nanoscrolls with controlled diameters and to probe their structure-dependent optical behaviors are still lacking. Expanding on the previous finding that Janus TMD monolayers─with intrinsic asymmetry and built-in strain─spontaneously form nanoscrolls, we now demonstrate diameter-tunable nanoscrolls derived from Janus WSSe/WSe<sub>2</sub> heterostructures. The incorporation of a Janus monolayer facilitates the scrolling of heterostructures and enables continuous tuning of nanoscroll diameters across a broad range─from ∼10 nm to ∼1 μm. The resulting structures exhibit uniform crystallinity and composition, as confirmed by scanning transmission electron microscopy. Optical characterizations reveal anisotropic Raman responses and strain-induced modulation of second-harmonic generation (SHG). These results indicate that Janus-based nanoscrolls provide a versatile platform for investigating structure-property relationships and developing rolled TMD systems for advanced photonic and optoelectronic applications.