A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles

Figure 1

Typical (a) XRD, (b) TEM, (c) SEM image, and hysteresis loop pattern (d) of as-prepared magnetite nanoparticles (MNPs). The scale bar in TEM and SEM image is 75 nm and 10 μm, respectively.

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(b)

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(d)