title: Nanoimprint lithography of Al nanovoids for deep-UV SERS.
abstract: Deep-ultraviolet surface-enhanced Raman scattering (UV-SERS) is a promising technique for bioimaging and detection because many biological molecules possess UV absorption lines leading to strongly resonant Raman scattering. Here, Al nanovoid substrates are developed by combining nanoimprint lithography of etched polymer/silica opal films with electron beam evaporation, to give a high-performance sensing platform for UV-SERS. Enhancement by more than 3 orders of magnitude in the UV-SERS performance was obtained from the DNA base adenine, matching well the UV plasmonic optical signatures and simulations, demonstrating its suitability for biodetection.
authors.affiliation: Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, United Kingdom.
authors.forename: Tao
authors.initials: T
authors.lastname: Ding
authors.forename: Daniel O
authors.initials: DO
authors.lastname: Sigle
authors.forename: Lars O
authors.initials: LO
authors.lastname: Herrmann
authors.forename: Daniel
authors.initials: D
authors.lastname: Wolverson
authors.forename: Jeremy J
authors.initials: JJ
authors.lastname: Baumberg
keywords: adenine; nanobowls; polymer opals; resonant Raman; stamps