具有铁磁纳米颗粒的DNA定向磁网络形成。

DNA-directed magnetic network formations with ferromagnetic nanoparticles.

作者信息

Lee H Y, Sacho Y, Kanki T, Tanaka H, Shirakawa H, Cheon J W, Yoon J H, Kang N J, Park J I, Kawai T

机构信息

Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.

出版信息

J Nanosci Nanotechnol. 2002 Dec;2(6):613-5. doi: 10.1166/153348802321105879.

DOI:10.1166/153348802321105879

PMID:12908423

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 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.

摘要

我们通过DNA分子在大规模云母表面（12毫米×12毫米）上的纳米级自组装，形成了嵌入直径为12纳米的铁磁钴纳米颗粒的DNA网络；然后我们用原子力显微镜确认了其结构特征。此外，非接触磁力显微镜测量显示，一些嵌入的钴纳米颗粒具有不同的磁化方向，类似于磁数据存储设备中的“位”。