Science Daily February 9, 2024
The use of graphene and other 2D materials to create electronic and optoelectronic devices has been limited by the lack of effective large-area transfer processes. An international team of researchers (South Korea, Japan) has developed a method that uses functional tapes with adhesive forces controlled by ultraviolet light. The adhesion of the tape was optimized for the transfer of monolayer graphene, providing a yield of over 99%. Once detached from the growth substrate, the graphene/tape stack enables easy transfer of graphene to the desired target substrate. The method could be used to transfer other 2D materials, including bilayer graphene, transition metal dichalcogenides, hexagonal boron nitride and stacked heterostructures. The solvent-free nature of the final release step facilitated transfer to various target substrates including flexible polymers, paper, and three-dimensional surfaces. The tape/2D material stacks could also be cut into desired sizes and shapes, allowing site-selective device fabrication with reduced loss of 2D materials and boost the production of 2D materials for next-generation devices…. read more. Open Access TECHNICAL ARTICLE
Mechanism of UV tape-assisted graphene transfer. Credit: Nature Electronics, February 9, 2024