Journal
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES
Volume 57, Issue 6, Pages 1180-1190Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S2070205121060113
Keywords
silver nanostructure; FDTD simulation; size effect; shape effect; dielectric environment effect; composition effect; localized surface plasmon resonance
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Funding
- Jundi-Shapur University of Technology of Dezful and Shahid Chamran University of Ahvaz
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This paper investigates the effects of size, shape, dielectric environment, and composition on the optical properties of silver nanoparticles. The study shows that these properties can be tuned to control the localized surface plasmon resonance phenomena in nanoparticles for various applications. The theoretical and experimental results are in good agreement.
Collective oscillation of electrons in the conduction band of noble metal nanoparticles is known as localized surface plasmon resonance (LSPR) phenomena. Investigations of the LSPR include non-radiative near-field behavior near metal nanoparticles and radiative far-field behavior at greater distances which depend on geometric and structural properties of nanoparticles. So, these behavior of the LSPRs can easily be tuned by changing these properties for different applications in biosensors, communications, and optics. In this paper, we investigated the effects of the size, shape, dielectric environment, and composition on near-field and far-field optical properties of silver nanospheres, theoretically and experimentally. For this purpose, silver nanospheres with different diameter sizes, silver nanowires, silver nanocubes, and gold nanospheres were synthesized and characterized and also the two-dimensional finite-difference time-domain (FDTD) method was used for simulations. The results show that the theoretical and experimental studies are in good agreement.
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