A triple-layer design for polyethyleneimine-coated, nanostructured magnetic particles and their use in DNA binding and transfection

Humphrey Hak Ping Yiu, Stuart C McBain, A J El Haj, Jon Dobson

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Nanostructured iron oxide - silica particles have been prepared using SBA- 15 mesoporous silica particles as a template. Iron oxide nanoparticles were impregnated inside the mesopores of the silica particles via a wet impregnation method. The resultant material exhibited superparamagnetic properties with an unsaturated magnetic moment due to the formation of iron ( III) oxide nanoparticles inside the mesopores. The surface of these iron oxide - silica particles has also been coated with polyethyleneimine ( PEI) to enable attachment of DNA. The PEI- coated particles showed a high DNA binding capacity and have great potential for development as a new vehicle for gene delivery.
Original languageEnglish
Article number435601
JournalNanotechnology
Volume18
Issue number43
DOIs
Publication statusPublished - 31 Oct 2007

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