Nano Archive

Design and fabrication of non-superparamagnetic high moment magnetic nanoparticles for bioapplications

Punnakitikashem, Punnapob and Chang, Shih-Hsin and Huang, Chien-Wen and Liu, J. Ping and Hao, Yaowu (2010) Design and fabrication of non-superparamagnetic high moment magnetic nanoparticles for bioapplications. Journal of Nanoparticle Research, 12 (4). pp. 1101-1106. ISSN 1388-0764

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Abstract

We present a new type of magnetic nanoparticles for bioapplications. Multilayered nanodisks consisting of two magnetic layers separated by a non-magnetic layer with two capping layers were designed and fabricated. Two key magnetic requirements for bioapplications, a high saturation magnetic moment and a near-zero remanence, were achieved through the magnetostatic interlayer coupling between two magnetic layers. Capping layers provide functionalization sites for biomolecule attachment. A pillar-template-based synthesis method was employed for fabrication. Nanodisks with a diameter of 70 nm and a thickness of 60 nm were produced in large quantity. The magnetic characterization shows that each nanodisk possesses a magnetic moment equivalent to 100 10-nm Co nanoparticles and a near-zero remanent moment.

Item Type:Article
Subjects:Physical Science > Nanomagnetics
Biomedical Science > Nanomedicine
ID Code:8871
Deposited By:CSMNT
Deposited On:07 Jul 2010 10:22
Last Modified:19 Aug 2010 13:35

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