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Tunable-Diameter Nanoscrolls from Janus WSSe/WSe2 Heterostructures
Masahiko Kaneda1,2, Wenjin Zhang1, Dingkun Bi3,4
1Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan.
ACS Nano
|September 23, 2025
Summary
Researchers created tunable Janus transition metal dichalcogenide (TMD) nanoscrolls. These nanostructures allow for controlled diameters and offer a platform for advanced photonic and optoelectronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Janus transition metal dichalcogenide (TMD) nanoscrolls are emerging as key structures for exploring curvature- and chirality-dependent phenomena.
- Current research lacks systematic methods for fabricating multilayer Janus TMD nanoscrolls with controlled diameters and analyzing their structure-dependent optical properties.
Purpose of the Study:
- To demonstrate diameter-tunable Janus TMD nanoscrolls fabricated from WSSe/WSe2 heterostructures.
- To investigate the structure-dependent optical behaviors of these novel nanoscrolls.
Main Methods:
- Fabrication of multilayer Janus WSSe/WSe2 heterostructures.
- Controlled scrolling to achieve tunable nanoscroll diameters (10 nm to 1 μm).
- Characterization using scanning transmission electron microscopy (STEM) and optical techniques (Raman spectroscopy, second-harmonic generation).
Main Results:
- Successful fabrication of Janus nanoscrolls with diameters continuously tunable across a wide range.
- Uniform crystallinity and composition confirmed by STEM.
- Anisotropic Raman responses and strain-modulated second-harmonic generation (SHG) observed, indicating structure-dependent optical properties.
Conclusions:
- Janus-based nanoscrolls offer a versatile platform for studying structure-property relationships.
- These nanostructures are promising for developing advanced rolled TMD systems for photonic and optoelectronic applications.
