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Rf heating measurement set-up with water-cooled LCR resonator consisting of a parallel plate capacitor and solenoid.
Magnitude of conservative electric field Ez, magnetically induced electric field Eϕ, and magnetic field Hz are shown for solenoid with quartz tube containing air sample (left images); conducting sample (central images) and air sample with copper shield (right images).
E rf and Hrf vector components distribution in (a) parallel plate capacitor (Ey), (b) solenoid (Es = Eϕ + Ez), and (c) solenoid with gapped copper shield (Hz and Eϕ).
Temperature dependence on time plotted for (a) 28 mg/ml, (b) 1 mg/ml SPIO suspension samples measured in three rf fields configurations. Insets show qm slopes and linear dependence of T on t during first 20 s of heating. The other two insets depict NPs overall size and zeta potential distribution.
Slope (q = dT/dt) values of NaCl and calculated local fields values for the three configurations.
Slope values (q = dT/dt) of SPIO for the three configurations.
SAR values for respective SPIO concentrations. (Hz = 7.1 kA/m, Es = 1.91 kV/m, f = 30 MHz).
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