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Synthesis and In Vitro Characterization of Fe(3+)-Doped Layered Double Hydroxide Nanorings as a Potential Imageable Drug Delivery System.
Materials 2017 September 28
Highly dispersed Fe(3+)-doped layered double hydroxide (LDH-Fe) nanorings were obtained by a simple coprecipitation-acid etching approach. The morphology, structure, magnetic resonance imaging (MRI) performance in vitro, drug loading and releasing, Fe(3+) leakage, and cytotoxicity of the as-prepared LDH-Fe nanorings were characterized. The LDH-Fe nanorings showed good water dispersity and a well-crystallized structure. The DLS average size of nanoparticles was measured to be 94.5 nm. Moreover, the MRI tests showed a favourable T₁-weighted MRI performance of the LDH-Fe nanoring with r₁ values of 0.54 and 1.68, and low r₂/r₁ ratios of 10.1 and 6.3, pre- and after calcination, respectively. The nanoparticles also showed high model drug (ibuprofen) loading capacities, low Fe(3+) leakage, and negligible cytotoxicity. All these results demonstrate the potential of LDH-Fe nanorings as an imageable drug delivery system.
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