Paraffin-enabled graphene transfer.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30787292.
- Also identified by DOI 10.1038/s41467-019-08813-x and PMC identifier 6382797.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The performance and reliability of large-area graphene grown by chemical vapor deposition are often limited by the presence of wrinkles and the transfer-process-induced polymer residue. Here, we report a transfer approach using paraffin as a support layer, whose thermal properties, low chemical reactivity and non-covalent affinity to graphene enable transfer of wrinkle-reduced and clean large-area graphene. The paraffin-transferred graphene has smooth morphology and high electrical reliability with uniform sheet resistance with ~1% deviation over a centimeter-scale area. Electronic devices fabricated on such smooth graphene exhibit electrical performance approaching that of intrinsic graphene with small Dirac points and high carrier mobility (hole mobility = 14,215 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>; electron mobility = 7438 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>), without the need of further annealing treatment. The paraffin-enabled transfer process could open realms for the development of high-performance ubiquitous electronics based on large-area two-dimensional materials.