Effective EMI shielding behaviour of thin graphene/PMMA nanolaminates in the THz range.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34341360.
- Also identified by DOI 10.1038/s41467-021-24970-4 and PMC identifier 8329220.
- 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 use of graphene in a form of discontinuous flakes in polymer composites limits the full exploitation of the unique properties of graphene, thus requiring high filler loadings for achieving- for example- satisfactory electrical and mechanical properties. Herein centimetre-scale CVD graphene/polymer nanolaminates have been produced by using an iterative 'lift-off/float-on' process and have been found to outperform, for the same graphene content, state-of-the-art flake-based graphene polymer composites in terms of mechanical reinforcement and electrical properties. Most importantly these thin laminate materials show a high electromagnetic interference (EMI) shielding effectiveness, reaching 60 dB for a small thickness of 33 μm, and an absolute EMI shielding effectiveness close to 3·10<sup>5</sup> dB cm<sup>2</sup> g<sup>-1</sup> which is amongst the highest values for synthetic, non-metallic materials produced to date.