Unraveling the Effects of Size, Composition, and Substrate on the Localized Surface Plasmon Resonance Frequencies of Gold and Silver Nanocubes: A Systematic Single-Particle Approach
| Autor: | Laurence D. Marks, Younan Xia, Richard P. Van Duyne, Claire M. Cobley, George C. Schatz, Jeffrey M. McMahon, Jiaxing Huang, Kwonnam Sohn, Emilie Ringe |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Finite-difference time-domain method Physics::Optics Nanoparticle Nanotechnology Dielectric Substrate (electronics) Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Particle Size composition Physical and Theoretical Chemistry Surface plasmon resonance Localized surface plasmon |
| Zdroj: | The Journal of Physical Chemistry C. 114:12511-12516 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp104366r |
| Popis: | Localized surface plasmon resonances (LSPRs), resulting from the interaction of light with metal nanoparticles, are powerful tools for biological sensors, surface-enhanced spectroscopies, and optical devices. LSPR frequencies are strongly dependent on a nanoparticle’s structure, composition, and local dielectric environment. However, these relationships are prohibitively difficult or impossible to probe from bulk solutions due to the heterogeneity of chemically synthesized products. In this study, systematic single-particle structure−property measurements, coupled with a statistical analysis and FDTD calculations, are performed on silver and gold nanocubes. The dependencies of LSPR frequencies on nanocube size, composition, and substrate dielectric constant are determined. The results obtained represent the most quantitative measurements and analysis to date, yielding predictive rules and fundamental insights into the interactions between nanoparticles and substrates. |
| Databáze: | OpenAIRE |
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