DNA-directed magnetic network formations with ferromagnetic nanoparticles.
We formed a DNA network embedding ferromagnetic cobalt nanoparticles with a 12-nm diameter through a nanoscale self-assembly of DNA molecules on large-scale mica surfaces (12 mm x 12 mm); we then confirmed its structural characteristics with an atomic force microscope. Moreover, noncontact magnetic force microscope measurement revealed that some embedded cobalt nanoparticles have different directions of magnetization, similar to "bits" in magnetic data storage devices.
Lee
H Y
HY
Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
Sacho
Y
Y
Kanki
T
T
Tanaka
H
H
Shirakawa
H
H
Cheon
J W
JW
Yoon
J H
JH
Kang
N J
NJ
Park
J I
JI
Kawai
T
T
D000538:Aluminum Silicates / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D004247:DNA / Q000737:chemistry*; D046911:Macromolecular Substances; D008280:Magnetics; D018625:Microscopy, Atomic Force; D008863:Microspheres; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties; D013698:Templates, Genetic
D000538:Aluminum Silicates; D003102:Colloids; D046911:Macromolecular Substances; D003035:Cobalt; D004247:DNA; C011934:mica