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A rational study of the influence of Mn(2+)-insertion in Prussian blue nanoparticles on their photothermal properties

Abstract : We investigated a series of Mn-Prussian blue (PB) nanoparticles NaMnFe[Fe(CN)]·HO of similar size, surface state and cubic morphology with various amounts of Mn synthesized through a one step self-assembly reaction. We demonstrated by a combined experimental-theoretical approach that during the synthesis, Mn substituted Fe up to a Mn/Na-Mn-Fe ratio of 32 at% in the PB structure, while for higher amounts, the Mn[Fe(CN)] analogue is obtained. For comparison, the post-synthetic insertion of Mn2+ in PB nanoparticles was also investigated and completed with Monte-Carlo simulations to probe the plausible adsorption sites. The photothermal conversion efficiency () of selected samples was determined and showed a clear dependence on the Mnamount with a maximum efficiency for a Mn/Na-Mn-Fe ratio of 10 at% associated with a dependence on the nanoparticle concentration. Evaluation of the photothermal properties of these nanoparticles performed on triple negative human breast adenocarcinoma (MDA-MB-231) cells by using continuous and pulsed laser irradiation confirm their excellent PTT efficiency permitting low dose use.
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https://hal.archives-ouvertes.fr/hal-03414675
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Tuesday, August 16, 2022 - 10:32:24 AM
Last modification on : Tuesday, September 27, 2022 - 4:47:35 AM

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Maëlle Cahu, Lamiaa M A Ali, Saad Sene, Jérôme Long, Franck Camerel, et al.. A rational study of the influence of Mn(2+)-insertion in Prussian blue nanoparticles on their photothermal properties. Journal of materials chemistry‎ B, Royal Society of Chemistry, 2021, 9 (47), pp.9670-9683. ⟨10.1039/d1tb00888a⟩. ⟨hal-03414675⟩

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