Single-Photon-Single-Electron Transition for Interpretation of Optical Spectra of Nonspherical Metal Nanoparticles in Aqueous Colloidal Solutions
Joint Authors
Michael Köhler, J.
Kuhfuß, Danja
Witthöft, Phillip
Hentschel, Martina
Knauer, Andrea
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-30
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Noble metal nanoparticles—especially shape anisotropic particles—have pronounced resonances in the optical spectrum.
These sensitive absorption modes attract great interest in various fields of application.
For nonspherical particles, no analytic description of the absorption spectra according to the commonly used Mie theory is possible.
In this work, we present a semi-empirical approach for the explanation of the optical spectra of shape anisotropic particles such as silver nanoprisms and gold nanorods.
We found an interpretation of the optical absorption spectra which is based on a single-photon-single-electron transition.
This model is in a better agreement with the basic assumptions of quantum mechanics than the electrodynamic model of a localized surface plasmon excitation.
Based on microfluidically obtained Ag nanoprisms and Au nanorods with very high ensemble homogeneities, dependencies between the geometrical properties of the shape anisotropic noble metal nanoparticles and the spectral position of the longitudinal absorption mode could be derived, which show that the assumption of a composed relative permittivity and the inclusion of the Rydberg constant is sufficient to describe the optical properties of the shape anisotropic particles.
Within the scope of the measuring accuracy, the calculations furthermore lead to the value of the refractive index of the particle-surrounding medium.
American Psychological Association (APA)
Michael Köhler, J.& Kuhfuß, Danja& Witthöft, Phillip& Hentschel, Martina& Knauer, Andrea. 2018. Single-Photon-Single-Electron Transition for Interpretation of Optical Spectra of Nonspherical Metal Nanoparticles in Aqueous Colloidal Solutions. Journal of Nanomaterials،Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1193821
Modern Language Association (MLA)
Michael Köhler, J.…[et al.]. Single-Photon-Single-Electron Transition for Interpretation of Optical Spectra of Nonspherical Metal Nanoparticles in Aqueous Colloidal Solutions. Journal of Nanomaterials No. 2018 (2018), pp.1-8.
https://search.emarefa.net/detail/BIM-1193821
American Medical Association (AMA)
Michael Köhler, J.& Kuhfuß, Danja& Witthöft, Phillip& Hentschel, Martina& Knauer, Andrea. Single-Photon-Single-Electron Transition for Interpretation of Optical Spectra of Nonspherical Metal Nanoparticles in Aqueous Colloidal Solutions. Journal of Nanomaterials. 2018. Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1193821
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1193821