Magnetic properties of DNA-templated Co/Cu naonoparticle chains

doi:10.1088/1674-1056/19/8/088103

中国物理B ›› 2010, Vol. 19 ›› Issue (8): 88103-088103.doi: 10.1088/1674-1056/19/8/088103

Magnetic properties of DNA-templated Co/Cu naonoparticle chains

高有辉¹, 卫玲¹, 夏卫星², 進藤大輔², 高春蕾³

(1)Department of Physics, Beijing Normal University, Beijing 100875, China; (2)Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira, 2-Chome, Aobaku, Sendai 980-8577, Japan; (3)The First Institute of Oceanography, SOA, 6 Xianxialing Road, Qingdao 266061, China

收稿日期:2009-10-26 修回日期:2010-01-12 出版日期:2010-08-15 发布日期:2010-08-15
基金资助:
Project partially supported by the Key Project of the Ministry of Education of China (Grant No. 109025).

Magnetic properties of DNA-templated Co/Cu naonoparticle chains

Gao You-Hui(高有辉)^a)†, Wei Ling(卫玲)^a), Gao Chun-Lei(高春蕾)^b), Xia Wei-Xing(夏卫星)^c), and Shindo Daisuke(進藤大輔)^c)

^a Department of Physics, Beijing Normal University, Beijing 100875, China; ^b The First Institute of Oceanography, SOA, 6 Xianxialing Road, Qingdao 266061, China; ^c Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira, 2-Chome, Aobaku, Sendai 980-8577, Japan

Received:2009-10-26 Revised:2010-01-12 Online:2010-08-15 Published:2010-08-15
Supported by:
Project partially supported by the Key Project of the Ministry of Education of China (Grant No. 109025).

摘要/Abstract

摘要： According to ultraviolet (UV)-vis absorption spectra recorded in the DNA metallization process, DNA-templated Co/Cu binary nanoparticle chains are fabricated by incubating genome DNA of paralichthys olivaceus muscle in CoCl₂ and CuCl₂ mixture solution for 20 hours and reducing the complex for 2 hours. Transmission electron microscopy observation indicates that Co and Cu nanoparticles with 20 nm in diameter were randomly dispersed on the DNA template. The superconducting quantum interference device (SQUID) measurements display that the magnetic interaction between cobalt particles is greatly decreased by the copper particle. With increasing copper content, the coercivity of the systems enhance from 9 Oe to 100 Oe (1 Oe=79.5775 A/13).

Abstract: According to ultraviolet (UV)-vis absorption spectra recorded in the DNA metallization process, DNA-templated Co/Cu binary nanoparticle chains are fabricated by incubating genome DNA of paralichthys olivaceus muscle in CoCl₂ and CuCl₂ mixture solution for 20 hours and reducing the complex for 2 hours. Transmission electron microscopy observation indicates that Co and Cu nanoparticles with 20 nm in diameter were randomly dispersed on the DNA template. The superconducting quantum interference device (SQUID) measurements display that the magnetic interaction between cobalt particles is greatly decreased by the copper particle. With increasing copper content, the coercivity of the systems enhance from 9 Oe to 100 Oe (1 Oe=79.5775 A/13).

Key words: DNA-templated, Co/Cu nanoparticle, magnetic interaction

中图分类号: (Nanotechnologies-design)

87.85.Qr

87.14.G- (Nucleic acids) 87.19.Ff (Muscles) 87.64.Ee (Electron microscopy)

高有辉, 卫玲, 高春蕾, 夏卫星, 進藤大輔. Magnetic properties of DNA-templated Co/Cu naonoparticle chains[J]. 中国物理B, 2010, 19(8): 88103-088103.

Gao You-Hui(高有辉), Wei Ling(卫玲), Gao Chun-Lei(高春蕾), Xia Wei-Xing(夏卫星), and Shindo Daisuke(進藤大輔). Magnetic properties of DNA-templated Co/Cu naonoparticle chains[J]. Chin. Phys. B, 2010, 19(8): 88103-088103.

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Magnetic properties of DNA-templated Co/Cu naonoparticle chains

Magnetic properties of DNA-templated Co/Cu naonoparticle chains

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