ArticleACS applied materials & interfaces2025
Transfer-Free Conformal Graphene Coating on Pyramidal Microstructures Decorated with Silver Nanoparticles for Superior Raman Signal Enhancement.
Article in ACS applied materials & interfaces, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Graphene, a two-dimensional nanomaterial with excellent physicochemical properties, has considerable potential to functionalize surfaces for diverse applications. However, reliable methods for preparing uniform conformal graphene on complex surfaces are still limited. In this study, we develop a practical strategy for the direct growth of conformal graphene coatings on silicon substrates textured with randomly distributed micropyramidal structures. The produced transfer-free graphene exhibits high uniformity (monolayer content ∼95%), low defect density, and excellent conformality, even across high-curvature features, such as micropyramid apexes. The graphene films not only faithfully replicate the underlying microstructures but also contribute to advantageous surface properties, including strong fluorescence quenching, excellent chemical stability, enhanced molecular adsorption, and improved charge-transfer interactions. All these properties are crucial for effective surface-enhanced Raman scattering (SERS). This graphene-coated pyramidal substrate enabled reproducible and stable SERS detection of rhodamine 6G (R6G), exhibiting high sensitivity with a detection limit of ∼10
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