Plasmonic Properties of Supported Pt and Pd Nanostructures

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 aspe...

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Bibliographic Details
Published in:Nano letters 2006-04, Vol.6 (4), p.833-838
Main Authors: Langhammer, Christoph, Yuan, Zhe, Zorić, Igor, Kasemo, Bengt
Format: Article
Language:English
Subjects:
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Computer Simulation
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Crystallization - methods
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Materials science
Materials Testing
Models, Chemical
Nanoscale materials and structures: fabrication and characterization
Nanostructures - chemistry
Nanostructures - ultrastructure
Other topics in nanoscale materials and structures
Palladium - analysis
Palladium - chemistry
Particle Size
Physics
Platinum - analysis
Platinum - chemistry
Surface and interface electron states
Surface Plasmon Resonance - methods
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Summary: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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl060219x