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Novel Fe 3 O 4 /poly(styrene (St)–acrylic acid (AA)) magnetic porous beads (MPBs) were fabricated by a seed swelling process using magnetite particles as seeds. The porous beads were characterized with scanning electron microscopy (SEM). Magnetic properties of the MPBs were obtained by electron spin resonance (ESR) and vibrating-sample magnetometer (VSM). All the observations indicated...
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