DNA-Directed Magnetic Network Formations with Ferromagnetic Nanoparticles
Abstract: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 × 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.
Document Type: Short Communication
Affiliations: 1: Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan 2: Okada Shiko, Co. Ltd., 1-7-2 Ohori, Matsubara, Osaka 580-0006, Japan 3: Department of Chemistry, Yonsei University, Seoul 120-749, Korea 4: Department of Chemistry, Korea Advanced Institute of Science and Technology, Taejon, 305-701, Korea
Publication date: December 1, 2002
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