Effect of Organic Capping on the Magnetic Properties of Au Nanoparticles

H. Zhang; Kiyonori Suzuki; K. Saito; J.S. Garitaonandia; E. Goikolea; M. Insausti

doi:10.4028/www.scientific.net/MSF.654-656.1174

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Effect of Organic Capping on the Magnetic...

Effect of Organic Capping on the Magnetic Properties of Au Nanoparticles

Abstract:

The magnetic and optical properties of regioregular poly(3-hexylthiophene)-capped Au nanoparticles (NPs) have been investigated in order to clarify the effectiveness of polythiophene capping on the induction of ferromagnetism in Au. The room-temperature magnetization curve of the polythiophene-capped Au NPs exhibits a clear hysteresis behavior with a spontaneous magnetization of 8.5 x 10-3 emu/g. The average magnetic moment of the surface Au atoms is estimated to be 2.6 x 10-3 B. The ultraviolet-visible spectrum shows a clear sign of the surface plasmon absorbance of metallic Au which reflects the week character of the chemical bond between the Au and S atoms on capping surface. Our results show clearly that Au NPs capped with polythiophene can be ferromagnetic.

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Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

1174-1177

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.1174

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Online since:

June 2010

Authors:

H. Zhang, Kiyonori Suzuki, K. Saito, J.S. Garitaonandia, E. Goikolea, M. Insausti

Keywords:

Charge-Transfer Ferromagnetism, Ferromagnetic Gold, Polythiophene, Ultraviolet-Visible Spectroscopy

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