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Erschienen in: Optical and Quantum Electronics 10/2023

01.10.2023

Thermo-optical properties of gold nanoparticles embedded in the oxygenated and deoxygenated human blood

verfasst von: A. Akouibaa, R. Masrour, M. Benhamou, A. Derouiche

Erschienen in: Optical and Quantum Electronics | Ausgabe 10/2023

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Abstract

Gold nanoparticles (GNPs) aided plasmonic photothermal therapy has demonstrated promising results in the treatment of cancer. This treatment requires intravenous or intratumorally injection to insert GNPs into cancer cells and irradiate them with Visible-Near Infrared light that will be converted into heat. In this study, the impact of the shape and morphology of GNPs injected into oxygenated and deoxygenated human blood on their optical properties and their heating capacity have been investigated. Firstly, the numerical finite element method (FEM) is used to determine the effective dielectric constants and absorption spectra of GNPs with various shapes and morphologies such as: solid sphere, hollow sphere, core-SiO2/gold shell, core-Fe3O4/gold shell and gold nanorods (GNRs). It has been shown that the absorption curves of GNPs depend on the oxygenation degree of blood in which they are injected. In particular for oxygen saturated blood the absorption spectrum shows two peaks: the first one which is more pronounced corresponds to the surface plasmons resonance (SPR) of GNPs is located in the visible- near infrared band and the second one which is smaller is located near the UV-blue band. On the other hand, the SPR-peak properties essentially position, and amplitude depend on the shapes of the studied nanoparticles and on the geometrical parameters such as the gold shell thickness for core/shell NPs (Hollow, SiO2/Au and Fe3O4/Au) and aspect ratio (length divided by width) for the GNRs. Second, we studied the thermo-plasmonic properties and local field enhancement at the SPR of spherical GNPs and GNRs injected into oxygen-saturated blood. The obtained results show that the local field enhancement is very important for GNRs compared to the spherical GNPs. The plasmonic heat dissipation of spherical GNPs dispersed in human blood is studied under effect of time and nanoparticle concentration.

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Literatur
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Metadaten
Titel
Thermo-optical properties of gold nanoparticles embedded in the oxygenated and deoxygenated human blood
verfasst von
A. Akouibaa
R. Masrour
M. Benhamou
A. Derouiche
Publikationsdatum
01.10.2023
Verlag
Springer US
Erschienen in
Optical and Quantum Electronics / Ausgabe 10/2023
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-023-05126-8

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