Magnetic wires with DNA cores: A magnetic force microscopy study

Nyamjav, Dorjderem; Kinsella, Joseph M.; Ivanisevic, Albena
February 2005
Applied Physics Letters;2/28/2005, Vol. 86 Issue 9, p093107
Academic Journal
Magnetic force microscopy (MFM) has been employed to study Fe3O4 nanowires containing DNA cores. The MFM experiments confirmed that long DNA molecules templated with Fe3O4 nanoparticles form a magnetic wire. The components of wires containing particles with sizes below 10 nm were recorded to behave as single domain particles with out-of-plane magnetization. The MFM study showed that one can change the magnetization states of the particles using a magnetic tip. The properties of the magnetic wires with DNA cores make them an attractive material for future magnetostatic devices.


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