Magnetic properties of DNA-templated Co/Cu naonoparticle chains

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

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).

Keywords: DNA-templated Co/Cu nanoparticle magnetic interaction

Received: 26 October 2009
Revised: 12 January 2010
Accepted manuscript online:

PACS:	87.85.Qr	(Nanotechnologies-design)
	87.14.G-	(Nucleic acids)
	87.19.Ff	(Muscles)
	87.64.Ee	(Electron microscopy)

Fund: Project partially supported by the Key Project of the Ministry of Education of China (Grant No. 109025).

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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 2010 Chin. Phys. B 19 088103

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