负载型铂和钯纳米结构的等离子体特性。

Plasmonic properties of supported Pt and Pd nanostructures.

作者信息

Langhammer Christoph, Yuan Zhe, Zorić Igor, Kasemo Bengt

机构信息

Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.

出版信息

Nano Lett. 2006 Apr;6(4):833-8. doi: 10.1021/nl060219x.

DOI:10.1021/nl060219x

PMID:16608293

Abstract

The plasmonic properties of nanodisk arrays of Pt, Pd, and, for comparison, Ag are studied over a large size and spectral range and analyzed theoretically by an electrostatic model. Pt and Pd nanodisks exhibit broad localized surface plasmons with a higher sensitivity of the plasmon to the disk aspect ratio compared to Ag. Extinction cross-sections are generally about 50% smaller for Pt and Pd. The spectral plasmon positions, line-widths, and extinction cross-sections are well reproduced by the model.

摘要

研究了铂、钯以及作为对比的银的纳米盘阵列的等离子体特性，研究范围涵盖大尺寸和光谱范围，并通过静电模型进行了理论分析。与银相比，铂和钯纳米盘表现出宽泛的局域表面等离子体，且等离子体对盘的纵横比具有更高的灵敏度。铂和钯的消光截面通常比银小约50%。该模型很好地再现了光谱等离子体位置、线宽和消光截面。