Ultrasharp light-scattering resonances of structured nanospheres: effects of size-dependent dielectric functions
| Autor: | Nikolai G. Khlebtsov, Boris N. Khlebtsov |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Light Biomedical Engineering Nanoparticle Electron Dielectric Molecular physics Light scattering Biomaterials Optics Image Interpretation Computer-Assisted Scattering Radiation Computer Simulation Particle Size Spectroscopy Nanotubes Scattering business.industry Size dependent Models Theoretical Surface Plasmon Resonance Atomic and Molecular Physics and Optics Nanoshell Electronic Optical and Magnetic Materials Refractometry business |
| Zdroj: | Journal of Biomedical Optics. 11:044002 |
| ISSN: | 1083-3668 |
| DOI: | 10.1117/1.2337526 |
| Popis: | Recently, Chen et al. [J. Biomed. Opt. Vol. 10, 024005 (2005)] reported on the concept of multicolor molecular imaging, which uses resonant light-scattering spectroscopy of multilayer nanospheres. They claimed that the resonance scattering peaks of three-layer nanoshells can be designed so that the ultrasharp widths are as narrow as 10 nm. Here we show that such ultrasharp labels cannot be fabricated in reality because the effects of size-dependent dielectric functions result in the five- to tenfold broadening of resonant scattering peaks. Furthermore, contrary to the data of Chen et al., we did not find any significant advantages of three-layer structures, as compared with the usual silica/metal nanoshells. |
| Databáze: | OpenAIRE |
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