Graphene-enhanced plasmonic nanohole arrays for environmental sensing in aqueous samples.

ABSTRACT: The label-free nature of surface plasmon resonance techniques (SPR) enables a fast, specific, and sensitive analysis of molecular interactions. However, detection of highly diluted concentrations and small molecules is still challenging. It is shown here that in contrast to continuous gold films, gold nanohole arrays can significantly improve the performance of SPR devices in angle-dependent measurement mode, as a signal amplification arises from localized surface plasmons at the nanostructures. This leads consequently to an increased sensing capability of molecules bound to the nanohole array surface. Furthermore, a reduced graphene oxide (rGO) sensor surface was layered over the nanohole array. Reduced graphene oxide is a 2D nanomaterial consisting of sp²-hybridized carbon ato

SUBMITTER: Genslein C 

PROVIDER: S-EPMC5238696 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature