Background

Two-dimensional (2D) van der Waals materials have emerged as critical building blocks for next-generation nanoelectronics, optoelectronics, and spintronic systems due to their unique electronic and magnetic properties. However, while molecular beam epitaxy (MBE) enables the growth of high-quality, large-area 2D materials with precise control, strong adhesion between the grown films and substrates has historically prevented effective transfer and integration into functional devices. Existing transfer approaches are limited in scalability, reproducibility, or material compatibility. This technology addresses these challenges by introducing a polymer-assisted dry transfer method that enables clean, large-area release and transfer of MBE-grown films, particularly for applications in heterostructure fabrication, quantum devices, and advanced semiconductor integration.

Technology Overview

Researchers at The Ohio State University have developed a polymer-assisted dry transfer platform that enables full-film transfer of high-quality MBE-grown 2D van der Waals materials while preserving their structural and functional integrity. The technology leverages a polycaprolactone (PCL)-based transfer stack combined with thermal release tape, PDMS mechanical support, and a controlled peeling process using a low-angle roller to overcome strong substrate adhesion.

Conventional approaches struggle with cracking, contamination, and incomplete transfer of epitaxially grown films. This method addresses these limitations by enabling uniform, pinhole-free transfer with minimal surface roughness increase (~1 nm) and preservation of key material properties, including magnetic and electronic behavior.

The platform has demonstrated compatibility across a broad class of materials—including transition metal dichalcogenides, topological insulators, and 2D magnetic materials—highlighting its versatility. It enables deterministic placement onto arbitrary substrates, facilitating the fabrication of stacked and twisted heterostructures.

This technology is particularly impactful for applications in semiconductor manufacturing, quantum information systems, spintronics, and advanced sensing, offering a scalable and high-fidelity pathway to integrate high-performance 2D materials into commercial devices.

Benefits

• High-quality transfer: Preserves structural, electronic, and magnetic properties post-transfer
• Large-area scalability: Enables full-film transfer (demonstrated up to mm-scale, with pathway to wafer-scale)
• Improved surface quality: Minimal increase in roughness (~1 nm), outperforming conventional PMMA-based methods
• Material versatility: Compatible with a wide range of 2D materials (semiconductors, magnets, topological insulators)
• Clean processing: Reduced contamination and residue due to optimized polymer system

Applications

• Advanced semiconductor devices (FETs, photodetectors, memory devices)
• Quantum and spintronic systems (2D magnets, topological heterostructures)
• Optoelectronic components (sensors, photonic devices)
• Heterogeneous integration platforms for next-generation electronics