Silica-Coated Gold Nanorod Arrays for Nanoplasmonics Devices
A facile method for growing silica layer on lithographically designed gold nanorod arrays (GNRAs) using a convenient sol–gel method is presented herein. The silica layer thickness was controlled on GNRAs with the reaction time. The localized surface plasmon resonance (LSPR) spectra of these hybrid m...
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Veröffentlicht in: | Langmuir 2013-10, Vol.29 (41), p.12633-12637 |
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Hauptverfasser: | , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A facile method for growing silica layer on lithographically designed gold nanorod arrays (GNRAs) using a convenient sol–gel method is presented herein. The silica layer thickness was controlled on GNRAs with the reaction time. The localized surface plasmon resonance (LSPR) spectra of these hybrid metal/dielectric nanoparticles were recorded before and after the coating and the effect of different solvents on the LSPR were also assessed. The change in the fluorescence and SERS intensities of a probe molecule (Rh6G) deposited on GNRAs and silica-coated GNRAs revealed that the as-fabricated silica layer does inhibit the quenching of molecular excited states and enhances photophysical/photochemical processes. This kind of hybrid metal/dielectric nanoparticle arrays hence turn out to be real good candidates to design new “plasmonic-active” devices. |
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ISSN: | 0743-7463 1520-5827 |
DOI: | 10.1021/la402810e |