| Magnetic properties of DNA-templated Co/Cu naonoparticle chains |
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| 作者姓名： | 高有辉 卫玲 高春蕾 夏卫星 進藤大輔 |
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| 作者单位： | Department of Physics, Beijing Normal University, Beijing 100875, China;Department of Physics, Beijing Normal University, Beijing 100875, China;The First Institute of Oceanography, SOA, 6 Xianxialing Road, Qingdao 266061, China;Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira, 2-Chome, Aobaku, Sendai 980-8577, Japan;Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira, 2-Chome, Aobaku, Sendai 980-8577, Japan |
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| 基金项目： | Project partially supported by the Key Project of the Ministry of Education of China (Grant No. 109025). |
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| 摘 要： | <正>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 CoCl_2 and CuCl_2 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/m).
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| 关 键 词： | DNA-templated Co/Cu nanoparticle magnetic interaction |
Magnetic properties of DNA-templated Co/Cu naonoparticle chains |
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| Gao You-Hui,Wei Ling,Gao Chun-Lei,Xia Wei-Xing and Shindo Daisuke.Magnetic properties of DNA-templated Co/Cu naonoparticle chains[J].Chinese Physics B,2010,19(8):628-631. |
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| Authors: | Gao You-Hui Wei Ling Gao Chun-Lei Xia Wei-Xing and Shindo Daisuke |
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| Institution: | [1]Department of Physics, Beijing Normal University, Beijing 100875, China [2]The First Institute of Oceanography, SOA, 6 Xianxialing Road, Qingdao 266061, China [3]Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira, 2-Chome, Aobaku, Sendal 980-8577, Japan |
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| 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). |
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| Keywords: | DNA-templated Co/Cu nanoparticle magnetic interaction |
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