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• W2978583481 abstract "Abstract Plasmonic nanomaterials possessing large‐volume, high‐density hot spots with high field enhancement are highly desirable for ultrasensitive surface‐enhanced Raman scattering (SERS) sensing. However, many as‐prepared plasmonic nanomaterials are limited in available dense hot spots and in sample size, which greatly hinder their wide applications in SERS devices. Here, we develop a two‐step physical deposition protocol and successfully fabricate 3D hierarchical nanostructures with highly dense hot spots across a large scale (6 × 6 cm 2 ). The nanopatterned aluminum film was first prepared by thermal evaporation process, which can provide 3D quasi‐periodic cloud‐like nanostructure arrays suitable for noble metal deposition; then a large number of silver nanoparticles with controllable shape and size were decorated onto the alumina layer surfaces by laser molecular beam epitaxy, which can realize large‐area accessible dense hot spots. The optimized 3D‐structured SERS substrate exhibits high‐quality detection performance with excellent reproducibility (13.1 and 17.1%), whose LOD of rhodamine 6G molecules was 10 −9 M. Furthermore, the as‐prepared 3D aluminum/silver SERS substrate was applied in detection of melamine with the concentration down to 10 −7 M and direct detection of melamine in infant formula solution with the concentration as low 10 mg/L. Such method to realize large‐area hierarchical nanostructures can greatly simplify the fabrication procedure for 3D SERS platforms, and should be of technological significance in mass production of SERS‐based sensors." @default.
• W2978583481 created "2019-10-10" @default.
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• W2978583481 date "2019-10-14" @default.
• W2978583481 modified "2023-10-16" @default.
• W2978583481 title "3D aluminum/silver hierarchical nanostructure with large areas of dense hot spots for surface‐enhanced raman scattering" @default.
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• W2978583481 doi "https://doi.org/10.1002/elps.201900285" @default.
• W2978583481 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31576580" @default.
• W2978583481 hasPublicationYear "2019" @default.
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