Quasi-3D Plasmonic Nanowell Array for Molecular Enrichment and SERS-Based Detection.

ABSTRACT: We report on a quasi-three-dimensional (3D) plasmonic nanowell array with high structural uniformity for molecular detection. The quasi-3D plasmonic nanowell array was composed of periodic hexagonal Au nanowells whose surface is densely covered with gold nanoparticles (Au NPs), separated by an ultrathin dielectric interlayer. The uniform array of the Au nanowells was fabricated by nanoimprint lithography and deposition of Au thin film. A self-assembled monolayer (SAM) of perfluorodecanethiol (PFDT) was coated on the Au surface, on which Au was further deposited. Interestingly, the PFDT-coated Au nanowells were fully covered with Au NPs with an ultra-high density of 375 μm-2 rather than a smooth film due to the anti-wetting property of the low-energy surface. The plasmonic nanogaps formed a

SUBMITTER: Kim S 

PROVIDER: S-EPMC7279529 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature