Examining Substrate-Induced Plasmon Mode Splitting and Localization in Truncated Silver Nanospheres with Electron Energy Loss Spectroscopy

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• 作者：Guoliang Li ; Charles Cherqui ; Yueying Wu ; Nicholas W. Bigelow ; Philip D. Simmons ; Philip D. Rack ; David J. Masiello ; Jon P. Camden
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2015
• 出版时间：July 2, 2015
• 年：2015
• 卷：6
• 期：13
• 页码：2569-2576
• 全文大小：494K
• ISSN：1948-7185

文摘

Motivated by the need to study the size dependence of nanoparticle鈥搒ubstrate systems, we present a combined experimental and theoretical electron energy loss spectroscopy (EELS) study of the plasmonic spectrum of substrate-supported truncated silver nanospheres. This work spans the entire classical range of plasmonic behavior probing particles of 20鈥?000 nm in diameter, allowing us to map the evolution of localized surface plasmons into surface plasmon polaritons and study the size dependence of substrate-induced mode splitting. This work constitutes the first nanoscopic characterization and imaging of these effects in truncated nanospheres, setting the stage for the systematic study of plasmon-mediated energy transfer in nanoparticle鈥搒ubstrate systems.