A facile direct synthesis has been developed to prepare colloidal Mn 3 O 4 nanoparticles with diameters of about 5−10 nm at normal temperature and pressure by an ultrasonic-assisted method in the absence of any additional nucleation and surfactant. High-resolution transmission electron microscopy observations revealed that the as-synthesized nanoparticles were single crystals. The magnetic properties of the samples were investigated in detail. The superconducting quantum interference device (SQUID) results showed that Mn 3 O 4 nanoparticles exhibited ferromagnetic behavior at low temperature (40 K).
No takes yet. Share an insight, caveat, or question.
Lei et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: