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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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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/m). 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/m).
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第8期628-631,共4页 中国物理B(英文版)
基金 Project partially supported by the Key Project of the Ministry of Education of China(Grant No.109025)
关键词 DNA-templated Co/Cu nanoparticle magnetic interaction DNA-templated, Co/Cu nanoparticle, magnetic interaction
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