Cascade strategy for triggered radical release by magnetic nanoparticles grafted with thermosensitive alkoxyamine

Bouvet, Basile; Sene, Saad; Félix, Gautier; Havot, Jeffrey; Audran, Gérard; Marque, Sylvain R. A.; Larionova, Joulia; Guari, Yannick

doi:10.1039/d2nr03567g

Cited by 2 publications

(7 citation statements)

References 62 publications

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“…The energy exchange function developed with the secondorder Taylor series provided the best fit for the time dependence of temperature elevation curve (Figure 5a red solid line), allowing extraction of a SAR value of 240 ± 3 W.g Fe −1 . This value is in the range of previously published ones obtained for efficient spherical IONPs working in water [43].…”

Section: Magneto-and Photothermal Heatingsupporting

confidence: 81%

“…The energy exchange function developed with the second-order Taylor series provided the best fit for the time dependence of temperature elevation curve (Figure 5a red solid line), allowing extraction of a SAR value of 240 ± 3 W.gFe −1 . This value is in the range of previously published ones obtained for efficient spherical IONPs working in water [43]. The photothermal properties of the IONP@Coum-C11-PPhOx27-PMOx59 nanoparticles were investigated in aqueous colloidal solutions under an 808 nm laser irradiation with a power of 2.58 W cm −2 .…”

Section: Magneto-and Photothermal Heatingsupporting

confidence: 54%

“…Oleylamine (200 µL) was added to the collected material as additional stabilizer. The resultant oleate/oleylamine-coated IONP/OA/OAm nanoparticles were dispersed and stored in chloroform (15 mL) [ 43 ].…”

Section: Methodsmentioning

confidence: 99%

“…Magnetothermal experiments. Magnetothermal experiences were fitted using the heat equation with a thermal exchange parameter ( f ( T )) as previously reported [ 43 ]:

where c v and P are the heat capacity in J/K and the heat power source in W, respectively. P is linked to the SAR by the following equation:

where m Fe is the total mass of iron in the experiment sample.…”

Section: Methodsmentioning

confidence: 99%

“…Magnetothermal experiments. Magnetothermal experiences were fitted using the heat equation with a thermal exchange parameter (f (T)) as previously reported [43]:…”

Section: Simulations and Fittingmentioning

confidence: 99%

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Magnetic Iron Oxide Nanoparticles Coated by Coumarin-Bound Copolymer for Enhanced Magneto- and Photothermal Heating and Luminescent Thermometry

Féron,

Catrouillet,

Sene

et al. 2024

Nanomaterials

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In this work, we report on the synthesis and investigation of new hybrid multifunctional iron oxide nanoparticles (IONPs) coated by coumarin-bound copolymer, which combine magneto- or photothermal heating with luminescent thermometry. A series of amphiphilic block copolymers, including Coum-C11-PPhOx27-PMOx59 and Coum-C11-PButOx8-PMOx42 bearing luminescent and photodimerizable coumarin moiety, as well as coumarin-free PPhOx27-PMOx57, were evaluated for their utility as luminescent thermometers and for encapsulating spherical 26 nm IONPs. The obtained IONP@Coum-C11-PPhOx27-PMOx59 nano-objects are perfectly dispersible in water and able to provide macroscopic heating remotely triggered by an alternating current magnetic field (AMF) with a specific absorption rate (SAR) value of 240 W.g−1 or laser irradiation with a photothermal conversion efficiency of η = 68%. On the other hand, they exhibit temperature-dependent emission of coumarin offering the function of luminescent thermometer, which operates in the visible region between 20 °C and 60 °C in water displaying a maximal relative thermal sensitivity (Sr) of 1.53%·°C−1 at 60 °C.

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Section: Magneto-and Photothermal Heatingsupporting

confidence: 81%

Section: Magneto-and Photothermal Heatingsupporting

confidence: 54%

Section: Methodsmentioning

confidence: 99%

“…Magnetothermal experiments. Magnetothermal experiences were fitted using the heat equation with a thermal exchange parameter ( f ( T )) as previously reported [ 43 ]:

where c v and P are the heat capacity in J/K and the heat power source in W, respectively. P is linked to the SAR by the following equation:

where m Fe is the total mass of iron in the experiment sample.…”

Section: Methodsmentioning

confidence: 99%

“…Magnetothermal experiments. Magnetothermal experiences were fitted using the heat equation with a thermal exchange parameter (f (T)) as previously reported [43]:…”

Section: Simulations and Fittingmentioning

confidence: 99%

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