The magnetic properties of Fe$_3$O$_4$ nanoparticle assemblies have been investigated in detail through a combination vibrating sample magnetometry and muon spin relaxation ($\mu$SR) techniques. Two samples with average particle sizes 5 nm 20 nm, respectively, were studied. For both samples, the $\mu$SR results exhibit clear signatures superparmagnetic state at high temperature magnetically blo...

Alterations in density and morphology of the cerebral microvasculature have been reported to occur in Alzheimer's disease patients and animal models of the disease. In this study we compared magnetic resonance imaging (MRI) techniques for their utility to detect age-dependent changes of the cerebral vasculature in the arcAβ mouse model of cerebral amyloidosis. Dynamic susceptibility contrast (D...

The colloidal dispersion in a nonpolar medium is an essential material for electrophoretic displays (EPD) with low-power consumption. A uniform-sized superparamagnetic iron oxide nanoparticle (SPION) promising candidate EPD, which exhibits tunable structural color by Bragg diffraction. In this study, the surface of SPION charged inverse micelles Solsperse-17k, oil-soluble polymeric surfactant. ...