Silica-Coated Gold Nanorod Arrays for Nanoplasmonics Devices

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• 作者：Ryohei Yasukuni ; Karima Ouhenia-Ouadahi ; Le茂la Boubekeur-Lecaque ; Nordin F茅lidj ; Fran莽ois Maurel ; R茅mi M茅tivier ; Keitaro Nakatani ; Jean Aubard ; Johan Grand
• 刊名：Langmuir
• 出版年：2013
• 出版时间：October 15, 2013
• 年：2013
• 卷：29
• 期：41
• 页码：12633-12637
• 全文大小：311K
• 年卷期：v.29,no.41(October 15, 2013)
• ISSN：1520-5827

文摘

A facile method for growing silica layer on lithographically designed gold nanorod arrays (GNRAs) using a convenient sol鈥揼el 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 鈥減lasmonic-active鈥?devices.