Wafer-Scale Ultrafine Wrinkle Architectures of TMDCs for Multifunctionality

Area of Science:

• Materials Science
• Nanotechnology
• Surface Chemistry

Background:

• Two-dimensional (2D) materials face intrinsic limitations.
• Wrinkled architectures can overcome these limitations by modulating electronic and catalytic properties.

Purpose of the Study:

• To develop a deterministic wafer-scale fabrication strategy for ultrafine wrinkled architectures in 2D materials.
• To investigate the enhanced electronic and catalytic properties of wrinkled molybdenum disulfide (MoS2).

Main Methods:

• Utilized a wet transfer method with controlled parameters (liquid media, thermal energy, polystyrene concentration).
• Fabricated densely distributed ultrafine wrinkled architectures in atomically thin MoS2 crystals.
• Achieved significant tensile strain (up to 3.29%) over a large area (50%).

Main Results:

• Demonstrated a practical route for wafer-scale fabrication of wrinkled MoS2 (w-MoS2).
• Achieved a low Tafel slope (52.3 mV dec-1) in hydrogen evolution reactions (HER), comparable to metallic TMDC catalysts.
• Developed a w-MoS2 memory device with a high on/off ratio (5 × 10^7) and a large memory window.

Conclusions:

• The developed morphology engineering offers a viable and reproducible pathway for high-performance 2D materials.
• Wrinkled MoS2 exhibits promising multifunctional device performance in electronics and catalysis.
• Strain engineering in 2D materials is a key strategy for next-generation applications.