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Shape and size effects in the optical properties of metallic nanorods
Abstract
The influence of size and geometrical shape on the optical properties of randomly oriented metallic nanorods is investigated using the discrete dipole approximation (DDA). Our calculations provide a benchmark for an accurate characterisation of nanorod suspensions by frequently used optical spectroscopic techniques. Our DDA results confirm the longitudinal plasmon resonance to be primarily affected by the nanorod aspect ratio, and also verify that the quasi-static (dipole) approximation for ellipsoidal particles is only valid for very small sizes. For prolate ellipsoidal and cylindrical nanorods with an identical aspect ratio, the latter exhibit a longitudinal resonance at significantly longer wavelengths. The importance of phase retardation and multipole contributions for larger nanorod dimensions is discussed. Also, we investigate the influence on the optical spectra of electron surface scattering, which arises from the limited size of the nanorods in comparison to the electron mean free path.
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Cites
Beiträge zur Optik trüber Medien, speziell kolloidaler Metallösungen
Mie, G. (1908) · Annalen der Physik · doi:10.1002/andp.19083300302 · Cited by 11,537
Cited by
Huang, X., Jain, P. K., El-Sayed, I. H., & El-Sayed, M. A. (2007) · Nanomedicine · doi:10.2217/17435889.2.5.681 · Cited by 1,503
Nanomaterials for Theranostics: Recent Advances and Future Challenges
Lim, E.-K., Kim, T., Paik, S., Haam, S., Huh, Y.-M., & Lee, K. (2015) · Chemical Reviews · doi:10.1021/cr300213b · Cited by 1,233
Single Cell Optical Imaging and Spectroscopy
Stender, A. S., Marchuk, K., Liu, C., Sander, S., Meyer, M. W., Smith, E. A., Neupane, B., Wang, G., Li, J., Cheng, J.-X., et al. (2013) · Chemical Reviews · doi:10.1021/cr300336e · Cited by 292
Metadata
- Authors
- Stefan Kooij, E., & Poelsema, B.
- Venue
- Physical Chemistry Chemical Physics
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2006
- Volume
- 8
- Issue
- 28
- Pages
- 3349
- ISSN
- 1463-9076 (ISSN-L)
- 1463-9084
- OpenAlex
- W2143921167
- Cited by
- 172
- References
- 1
- FWCI
- 5.61
- Type
- journal article
- Language
- en
- Open access
- closed
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