Optical properties of polydopamine-coated Au nanorods

Boris N. Khlebtsov; Andrey M. Burov; Fulvio Ratto; Nikolay G. Khlebtsov

doi:10.1117/12.2522165

3 June 2019 Optical properties of polydopamine-coated Au nanorods

Boris N. Khlebtsov, Andrey M. Burov, Fulvio Ratto, Nikolay G. Khlebtsov

Proceedings Volume 11067, Saratov Fall Meeting 2018: Computations and Data Analysis: from Nanoscale Tools to Brain Functions; 110671D (2019) https://doi.org/10.1117/12.2522165
Event: International Symposium on Optics and Biophotonics VI: Saratov Fall Meeting 2018, 2018, Saratov, Russian Federation

Abstract

Polydopamine-coated Au nanorods (AuNRs) have attracted a great interest for various biomedical applications. Polydopamine (PDA) is a light absorbing biopolymer with nonzero imaginary part of the refractive index, which exerts a significant effect on the optical properties of PDA-coated AuNRs. In this paper, we study the changes in plasmonic properties of AuNRs after PDA coating. We observed that the longitudinal plasmon resonance decreases while the transversal one increases. To confirm the experimental observations, we performed theoretical simulations of the extinction and scattering spectra for AuNRs with different geometrical properties, PDA shell thickness and refractive index. The loss of plasmonic peak intensity becomes higher as the axial ratio of the AuNRs or the imaginary part of the refractive index of PDA increase.

Citation Download Citation

Boris N. Khlebtsov, Andrey M. Burov, Fulvio Ratto, and Nikolay G. Khlebtsov "Optical properties of polydopamine-coated Au nanorods", Proc. SPIE 11067, Saratov Fall Meeting 2018: Computations and Data Analysis: from Nanoscale Tools to Brain Functions, 110671D (3 June 2019); https://doi.org/10.1117/12.2522165

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