High spatial resolution mapping of individual and collective localized surface plasmon resonance modes of silver nanoparticle aggregates: correlation to optical measurements

被引：10

作者：

Diaz-Egea, Carlos ^{[1
]}

Abargues, Rafael ^{[2
]}

Martinez-Pastor, Juan P. ^{[2
]}

Sigle, Wilfried ^{[3
]}

van Aken, Peter A. ^{[3
]}

Molina, Sergio I. ^{[1
]}

机构：

[1] Univ Cadiz, Inst Microscopia Elect & Mat, Dept Ciencia Mat & IM & QI, Fac Ciencias, Cadiz 11510, Spain

[2] Univ Valencia, Inst Ciencia Mat, UMDO Unidad Asociada CSIC IMM, Valencia 46071, Spain

[3] Max Planck Inst Intelligent Syst, Stuttgart Ctr Electron Microscopy, D-70569 Stuttgart, Germany

来源：

NANOSCALE RESEARCH LETTERS | 2015年 / 10卷

基金：

欧盟地平线“2020”;

关键词：

Plasmonics; Surface plasmon resonance; Silver nanoparticles; EFTEM; Nanoparticle clusters; Plasmonic modes; METAL NANOPARTICLES; ENVIRONMENT; MICROSCOPY; SINGLE; SHAPE;

D O I：

10.1186/s11671-015-1024-y

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Non-isolated nanoparticles show a plasmonic response that is governed by the localized surface plasmon resonance (LSPR) collective modes created by the nanoparticle aggregates. The individual and collective LSPR modes of silver nanoparticle aggregated by covalent binding by means of bifunctional molecular linkers are described in this study. Individual contributions to the collective modes are investigated at nanometer scale by means of energy-filtering transmission electron microscopy and compared to ultraviolet-visible spectroscopy. It is found that the aspect ratio and the shape of the clusters are the two main contributors to the low-energy collective modes.

引用

页数：6

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