Plasmonic Nanohybrid with Ultrasmall Ag Nanoparticles and Fluorescent Dyes

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• 作者：Gabriele Rainò ; Thilo Stöferle ; Chanhee Park ; Ho-Cheol Kim ; Teya Topuria ; Philip M. Rice ; In-Joo Chin ; Robert D. Miller ; Rainer F. Mahrt
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：May 24, 2011
• 年：2011
• 卷：5
• 期：5
• 页码：3536-3541
• 全文大小：896K
• 年卷期：0
• ISSN：1936-086X

文摘

We investigate a hybrid nanocomposite combining fluorescent dyes and ultrasmall (<3 nm) silver nanocrystals in a block copolymer micelle. Although the metal nanoparticles are significantly smaller than the electromagnetic skin depth, we observe a modification of the exciton lifetime and the nonradiative energy transfer among the dyes. This behavior is absent in a control experiment with dyes whose energetic levels are far from the plasmonic resonance, establishing the plasmonic nature of the interaction.