Large-Scale Plasmonic nanoCones Array For Spectroscopy Detection

• DOI: 10.1021/acsami.5b06887
• Publication Date: 2015-09-24T09:10:29Z
• Authors: Gobind Das; Edmondo Battista; Gianluigi Manzo; Filippo Causa; Paolo Antonio Netti; Enzo Di Fabrizio
• Keywords: fluorescence enhancement; gold binding peptide; nanocones; plasmonic device; SERS; surface functionalization; SERS; plasmonic device; SERS; fluorescence enhancement; gold binding peptide; nanocones; plasmonic device; surface functionalization; fluorescence enhancement; nanocones; 02 engineering and technology; 0210 nano-technology; gold binding peptide; surface functionalization

Advanced optical materials or interfaces are gaining attention for diagnostic applications. However, the achievement of large device interface as well facile surface functionalization largely impairs their wide use. The present work is aimed to address different innovative aspects related fabrication large-area 3D plasmonic arrays, direct and easy with capture elements, spectroscopic verifications through enhanced Raman fluorescence techniques. In detail, we have investigated effect a Au-based nanoCone array, fabricated by means nanoimprint technique over area (mm(2)), on protein capturing enhancement in signal. A selective gold surfaces was proposed using peptide (AuPi3) previously selected phage display. this regard, two sequences, labeled fluorescein biotin, were chemisorbed metallic surfaces. presence Au nanoCones array consents an electric field apex cone, enabling detection molecules. We witnessed around 12-fold increase intensity SERS factor 1.75 × 10(5) respect flat surface. Furthermore, sharp decrease lifetime confirms radiative emission (i.e., photonics density at cones).