Graduate Research and Discovery Symposium (GRADS)

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Nanoparticles with same core size and shell thickness were made. Samples with low, medium, and high gradients were compared with a control with no gradient. TEM (Transmission Electron Microscopy) results showed a well-controlled size with a mean diameter of 10 nm and standard deviation of 1 nm. The elemental distribution throughout the particle was analyzed by EELS (Electron Energy Loss Spectroscopy) to confirm the existence of core-gradient shell structure. Physical properties, such as saturation magnetization, blocking temperature, and effective anisotropy were then measured and calculated based on VSM (Vibration Sampling Magnetometry) and ZFC-FC (Zero Field Cooling-Field Cooling) measurements.