Nanoscrolls are a class of nanostructures where atomic layers of 2D materials are stacked consecutively in a coaxial manner to form a 1D spiral topography. Self‐assembly of chemical vapor deposition grown 2D WS2 monolayer into quasi‐1D van der Waals scroll structure instigates a plethora of unique physiochemical properties significantly different from its 2D counterparts. The physical properties of such nanoscrolls can be greatly manipulated upon hybridizing them with high‐quantum‐yield colloidal quantum dots, forming 0D/2D structures. The efficient dissociation of excitons at the heterojunctions of QD/2D hybridized nanoscrolls exhibits a 3000‐fold increased photosensitivity compared to the pristine 2D‐material‐based nanoscroll. The synergistic effects of confined geometry and efficient QD scatterers produce a nanocavity with multiple feedback loops, resulting in coherent lasing action with an unprecedentedly low lasing threshold. Predominant localization of the excitons along the circumference of this helical scroll results in a 12‐fold brighter emission for the parallel‐polarized transition compared to the perpendicular one, as confirmed by finite‐difference time‐domain simulation. The versatility of hybridized nanoscrolls and their unique properties opens up a powerful route for not‐yet‐realized devices toward practical applications.

Two-dimensional (2D) thermoelectrics have shown enhanced performance compared to bulk thermoelectrics but cannot easily be improved through nanostructuring, since phonon-boundary-scattering becomes ineffective under confined dimensions. To overcome this issue, we introduce a one-dimensional (1D) texturing approach that efficiently suppresses phonon transport between grains of 2D thermoelectrics (TE). Uniaxial graphene wrinkles were utilized to separate high-quality, ultrathin Bi2Se3 films in a highly directional manner. The TE properties of these textured samples exhibit a strongly anisotropic characteristic with a maximum ZT of 1.03 at room temperature, which represents the highest reported value for Bi2Se3. The texturing approach provides a route for the enhancement of 2D thermoelectrics for future applications.

Atomic-precision patterning at large scale is a central requirement for nanotechnology and future electronics that is hindered by the limitations of lithographical techniques. Historically, imperfections of the fabrication tools have been compensated by multi-patterning using sequential lithography processes. The realization of nanometer-scale features from much larger patterns through offset stacking of atomically thin masks is demonstrated. A unique mutual stabilization effect between two graphene layers produces atomically abrupt transitions that selectively expose single-layer covered regions. Bilayer regions, on the other hand, protect the underlying substrate from removal for several hours permitting transfer of atomic thickness variations into lateral features in various semiconductors. Nanoscopic offsets between two 2D materials layers could be introduced through bottom-up and top-down approaches, opening up new routes for high-resolution patterning. A self-aligned templating approach yields nanometer-wide bilayer graphene nanoribbons with macroscopic length that produces high-aspect-ratio silicon nanowalls. Moreover, offset-transfer of lithographically patterned graphene layers enables multipatterning of large arrays of semiconductor features whose resolution is not limited by the employed lithography and could reach <10 nm feature size. The results open up a new route to combining design flexibility with unprecedented resolution at large scale.

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Control of the precursor transport through oxygen dosing yields increased MoS2 coverage and increased connectivity between crystalline MoS2 domains.