Two-dimensional transition-metal dichalcogenide (2D TMD) layers are promising for stretchable and foldable electronics due to their thinness and exceptional electrical and optical properties. Despite their projected large strain limits, their mechanical tolerance needs enhancement for high-end devices. This article presents a strategy to transform 2D TMDs into 3D structures with improved mechanical stretchability while maintaining electrical integrity. By using kirigami patterning, inspired by an ancient paper-cutting art, researchers created 2D PtSe2-based kirigami electrical conductors on flexible polyimide substrates. These patterns achieve up to 2000% stretchability without losing electrical conductance and show tunable photoresponsiveness when paired with carbon nanotubes. Additionally, kirigami field-effect transistors with 2D PtSe2 layers demonstrate adjustable gate responses under mechanical stretching. Finite-element modeling verified the influence of kirigami pattern parameters on these responses. These advanced 3D structures open new opportunities for electronics and optoelectronics.-Scientific Journal cover by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
