Magnetite Core-Shell Nanoparticles in Nondestructive Flaw Detection of Polymeric Materials.

Nondestructive flaw detection in polymeric materials is important but difficult to achieve. In this research, the application of magnetite nanoparticles (MNPs) in nondestructive flaw detection is studied and realized, to the best of our knowledge, for the first time. Superparamagnetic and highly magnetic (up to 63 emu/g) magnetite core-shell nanoparticles are prepared by grafting bromo-end-group-functionalized poly(glycidyl methacrylate) (Br-PGMA) onto surface-modified FeO NPs.

Polyethyleneimine-based core-shell nanogels: a promising siRNA carrier for argininosuccinate synthetase mRNA knockdown in HeLa cells.

RNA interference using small interfering RNA (siRNA) is a promising biological strategy for treatment of diverse diseases; however, application of siRNA is severely hindered by its poor stability and low cellular uptake efficiency. We have recently demonstrated that polyethyleneimine (PEI)-based amphiphilic core-shell particles have several distinguishing advantages over native PEI and its derivatives. This paper presents a novel type of PEI-based nanogels with a biodegradable gelatin core.