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We present two novel SERS substrates which allow easily achievable sub-10 nm gaps — ‘Nanoparticles inside Nanolines’ and ‘Nanofingers inside Nanowires’. Theoretical studies based on Finite Difference Time Domain (FDTD) modelling as well as large-are fabrication methodologies for developing these substrates are discussed.
A convenient nanotechnique for fabrication of highly ordered hemispherical silver nanocap arrays templated by porous anodic alumina membranes as robust and cost-efficient surface-enhanced Raman scattering (SERS) substrates is reported. This geometry exhibits a high Raman signal due to periodically hexagonal arrangements and gap control between the nanostructures in the sub-10 nm regime. The surface...
Nanoimprint lithography is used to pattern the endface of an optical fiber. A biological nanotemplate is replicated into polymer and coated with metal. Observed enhancement of through-fibre Raman scattering validates the approach.
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