Fig. 5: Theoretical possibility of 3-channel activation (H·f = 3 kHz·T) using three different particles. | NPG Asia Materials

Fig. 5: Theoretical possibility of 3-channel activation (H·f = 3 kHz·T) using three different particles.

From: Comprehensive modelling of ferrofluids via dual dissipation mechanisms for multiplexed thermal activation

Fig. 5

All calculations were performed with FFs containing three particle types (n = 1000 for each), each with a standard deviation of 1 nm, dispersed in water. Two types of FFs were analysed: FF-1 and FF-2. FF-1 (a, d, and g) contains only Fe3O4 particles with different sizes: N channel (12.7 nm, 10 mg/mL), M channel (14 nm, 10 mg/mL), and B channel (18 nm, 1 mg/mL). FF-2 (b, e and h) contains both pure Fe3O4 and Co0.6Fe2.4O4 core-shell particles: N channel (9.4 nm, 10 mg/mL), M channel (14.7 nm, 7.5 mg/mL), and B channel (18 nm, 2.5 mg/mL). Each particle is distinguished by a different colour. The dashed lines indicate calculations using the Rosensweig model for each particle. a SAR of FF-1 and b FF-2 at 50 mT, stimulating the N channel. c Main idea of 3-channel activation. d SAR of FF-1 and e FF-2 at 25 mT, stimulating the M channel. f Calculated channel selectivity of FF-1, by Sn = Pn /(ΣP ̶̶ Pn). g SAR of FF-1 and h FF-2 at 50 mT, stimulating the B channel. i calculated channel selectivity of FF-2.

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