Figure 2.

Magnet-related properties of 20 nm ANCs with different surface coatings (double oleic acid [dOA] and bovine serum albumin [BSA]). (a) MRI relaxivity (r₁ and r₂) values; (b) M–H curve with a magnified view and saturation magnetization values for the individual and dOA-assembled NCs at 300 K; (c) specific absorption rates measured at a field strength of 10 kA·m^‒1 and a frequency of 512 kHz. (N.S., not significant at p > 0.1; *, significant at p < 0.1; **, significant at p < 0.05); (d) Temperature responses with water, BSA-CNCs at 0.1 mg·mL^‒1, and BSA-CNCs at 1.6 mg·mL^‒1 upon generating alternative magnetic fields. Temperature map generated by a thermo-sensitive infrared camera.