Determination of a localized surface plasmon resonance mode of Cu7S4 nanodisks by plasmon coupling

被引：21

作者：

Chen, L. ^{[1
]}

Sakamoto, M. ^{[2
,3
]}

Sato, R. ^{[2
]}

Teranishi, T. ^{[2
]}

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6110011, Japan

[2] Kyoto Univ, Inst Chem Sci, Kyoto 6110011, Japan

[3] Japan Sci & Technol Agcy, PRESTO, Kyoto 6110011, Japan

来源：

FARADAY DISCUSSIONS | 2015年 / 181卷

关键词：

OPTICAL-PROPERTIES; NANOCRYSTALS; SILVER; SHAPE; NANOPARTICLES; CARRIERS; SIZE;

D O I：

10.1039/c4fd00239c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Plasmon properties such as peak position, extinction cross-section and local electric field intensity are strongly dependent on excited, localized surface plasmon resonance (LSPR) modes. In non-spherical copper chalcogenide nanoparticles, assignment of the LSPR peaks to the corresponding oscillation modes has been controversial and requires experimental verification. We determined the in-plane LSPR mode of roxbyite Cu7S4 nanodisks from the plasmon coupling effect of nanodisks in solution. Compared with individual Cu7S4 nanodisks, self-assembled Cu7S4 nanodisk arrays in chloroform exhibited a blue-shifted LSPR peak with weaker optical density. This strongly suggests that the singular LSPR peak in the near-infrared region mainly originates from the inplane oscillation mode. In addition, we demonstrate that the same LSPR peak can be readily tuned by controlling the number of disks in the array.

引用

页码：355 / 364

页数：10

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