AI Article Synopsis
- Graphene films are emerging as effective moisture barriers for organic photonic devices and gas storage, but their current performance is not ideal.
- Research shows that reducing the interlayer distance in stacked graphene is crucial for minimizing water permeation, resulting in significantly lower water vapor transmission rates.
- The enhanced barrier performance is achieved by ensuring clean interfaces and proper contact between layers, which can lead to new applications and insights in the field of two-dimensional materials.
Article Abstract
Graphene films that can theoretically block almost all molecules have emerged as promising candidate materials for moisture barrier films in the applications of organic photonic devices and gas storage. However, the current barrier performance of graphene films does not reach the ideal value. Here, we reveal that the interlayer distance of the large-area stacked multilayer graphene is the key factor that suppresses water permeation. We show that by minimizing the gap between the two monolayers, the water vapor transmission rate of double-layer graphene can be as low as 5 × 10 g/(m d) over an A4-sized region. The high barrier performance was achieved by the absence of interfacial contamination and conformal contact between graphene layers during layer-by-layer transfer. Our work reveals the moisture permeation mechanism through graphene layers, and with this approach, we can tailor the interlayer coupling of manually stacked two-dimensional materials for new physics and applications.
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| http://dx.doi.org/10.1021/acs.nanolett.3c02453 | DOI Listing |
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