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Open AccessArticle

Laser Ablation-Assisted Synthesis of Plasmonic [email protected] Core-Satellite Nanocomposites for Biomedical Applications

1
Aix-Marseille University, CNRS, LP3, Campus de Luminy, 13013 Marseille, France
2
Moscow Institute of Physics and Technology, Center for Photonics and 2D Materials, 141700 Dolgoprudny, Russia
3
Aix-Marseille University, CNRS, LMA, 13013 Marseille, France
4
Aix-Marseille University, CNRS, Institut Fresnel, Centrale Marseille, 13013 Marseille, France
5
MEPhI, Bio-Nanophotonics Laboratory, Institute of Engineering Physics for Biomedicine (PhysBio), 31 Kashirskoe sh., 115409 Moscow, Russia
*
Authors to whom correspondence should be addressed.
Academic Editor: Sergei Kulinich
Nanomaterials 2021, 11(3), 592; https://doi.org/10.3390/nano11030592
Received: 27 January 2021 / Revised: 18 February 2021 / Accepted: 22 February 2021 / Published: 26 February 2021
Owing to strong plasmonic absorption and excellent biocompatibility, gold nanostructures are among best candidates for photoacoustic bioimaging and photothermal therapy, but such applications require ultrapure Au-based nanoformulations of complex geometry (core-shells, nanorods) in order to shift the absorption band toward the region of relative tissue transparency (650–1000 nm). Here, we present a methodology for the fabrication of [email protected] core-satellite nanostructures, comprising of a Si core covered with small Au nanoparticles (NP), based on laser ablative synthesis of Si and Au NPs in water/ethanol solutions, followed by a chemical modification of the Si NPs by 3-aminopropyltrimethoxysilane (APTMS) and their subsequent decoration by the Au NPs. We show that the formed core-satellites have a red-shifted plasmonic absorption feature compared to that of pure Au NPs (520 nm), with the position of the peak depending on APTMS amount, water−ethanol solvent percentage and Si−Au volume ratio. As an example, even relatively small 40-nm core-satellites (34 nm Si core + 4 nm Au shell) provided a much red shifted peak centered around 610 nm and having a large tail over 700 nm. The generation of the plasmonic peak is confirmed by modeling of [email protected] core-shells of relevant parameters via Mie theory. Being relatively small and exempt of any toxic impurity due to ultraclean laser synthesis, the [email protected] core-satellites promise a major advancement of imaging and phototherapy modalities based on plasmonic properties of nanomaterials. View Full-Text
Keywords: pulsed laser ablation in liquids; [email protected] core-satellite; core-shell; plasmonic nanoparticles; Mie theory; biomedical applications pulsed laser ablation in liquids; [email protected] core-satellite; core-shell; plasmonic nanoparticles; Mie theory; biomedical applications
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MDPI and ACS Style

Al-Kattan, A.; Tselikov, G.; Metwally, K.; Popov, A.A.; Mensah, S.; Kabashin, A.V. Laser Ablation-Assisted Synthesis of Plasmonic [email protected] Core-Satellite Nanocomposites for Biomedical Applications. Nanomaterials 2021, 11, 592. https://doi.org/10.3390/nano11030592

AMA Style

Al-Kattan A, Tselikov G, Metwally K, Popov AA, Mensah S, Kabashin AV. Laser Ablation-Assisted Synthesis of Plasmonic [email protected] Core-Satellite Nanocomposites for Biomedical Applications. Nanomaterials. 2021; 11(3):592. https://doi.org/10.3390/nano11030592

Chicago/Turabian Style

Al-Kattan, Ahmed; Tselikov, Gleb; Metwally, Khaled; Popov, Anton A.; Mensah, Serge; Kabashin, Andrei V. 2021. "Laser Ablation-Assisted Synthesis of Plasmonic [email protected] Core-Satellite Nanocomposites for Biomedical Applications" Nanomaterials 11, no. 3: 592. https://doi.org/10.3390/nano11030592

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