Ferromagnetism of polythiophene-capped Au nanoparticles

Kiyonori Suzuki; Hao Zhang; Kei Saito; Jose Javier Saiz Garitaonandia; Eider Goikolea; M Insausti

doi:10.163/1.3562444

Ferromagnetism of polythiophene-capped Au nanoparticles

Kiyonori Suzuki, Hao Zhang, Kei Saito, Jose Javier Saiz Garitaonandia, Eider Goikolea, M Insausti

Materials Science & Engineering

Research output: Contribution to journal › Article › Research › peer-review

7 Citations (Scopus)

Abstract

The magnetic and electrical transport properties of regioregular poly(3-hexylthiophene)-capped Au nanoparticles (NPs) doped with iodine have been investigated to clarify the effectiveness of conductive polymer capping on the induction of ferromagnetism in Au. The room-temperature magnetization curve of the undoped polythiophene-capped Au NPs exhibits a clear hysteresis behavior with a coercive force of 160 Oe. The spontaneous magnetization normalized by the mass of Au is 2.0 × 10−2 emu/g. The spontaneous magnetization was found virtually unaffected by iodine doping, whereas the electrical conductivity is enhanced dramatically to ∼10 S/cm. Our results show that polythiophene capping could lead to spontaneous magnetic polarization in Au NPs, and the conductivity of the polymer capping does not affect the ferromagnetism of the Au nanoparticles, opening a possibility for further investigation into the magnetotransport behavior of ferromagnetic Au NPs

Original language	English
Article number	07E328
Number of pages	3
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.163/1.3562444
Publication status	Published - 2011

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title = "Ferromagnetism of polythiophene-capped Au nanoparticles",

abstract = "The magnetic and electrical transport properties of regioregular poly(3-hexylthiophene)-capped Au nanoparticles (NPs) doped with iodine have been investigated to clarify the effectiveness of conductive polymer capping on the induction of ferromagnetism in Au. The room-temperature magnetization curve of the undoped polythiophene-capped Au NPs exhibits a clear hysteresis behavior with a coercive force of 160 Oe. The spontaneous magnetization normalized by the mass of Au is 2.0 × 10−2 emu/g. The spontaneous magnetization was found virtually unaffected by iodine doping, whereas the electrical conductivity is enhanced dramatically to ∼10 S/cm. Our results show that polythiophene capping could lead to spontaneous magnetic polarization in Au NPs, and the conductivity of the polymer capping does not affect the ferromagnetism of the Au nanoparticles, opening a possibility for further investigation into the magnetotransport behavior of ferromagnetic Au NPs",

author = "Kiyonori Suzuki and Hao Zhang and Kei Saito and Garitaonandia, {Jose Javier Saiz} and Eider Goikolea and M Insausti",

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T1 - Ferromagnetism of polythiophene-capped Au nanoparticles

AU - Suzuki, Kiyonori

AU - Zhang, Hao

AU - Saito, Kei

AU - Garitaonandia, Jose Javier Saiz

AU - Goikolea, Eider

AU - Insausti, M

PY - 2011

Y1 - 2011

N2 - The magnetic and electrical transport properties of regioregular poly(3-hexylthiophene)-capped Au nanoparticles (NPs) doped with iodine have been investigated to clarify the effectiveness of conductive polymer capping on the induction of ferromagnetism in Au. The room-temperature magnetization curve of the undoped polythiophene-capped Au NPs exhibits a clear hysteresis behavior with a coercive force of 160 Oe. The spontaneous magnetization normalized by the mass of Au is 2.0 × 10−2 emu/g. The spontaneous magnetization was found virtually unaffected by iodine doping, whereas the electrical conductivity is enhanced dramatically to ∼10 S/cm. Our results show that polythiophene capping could lead to spontaneous magnetic polarization in Au NPs, and the conductivity of the polymer capping does not affect the ferromagnetism of the Au nanoparticles, opening a possibility for further investigation into the magnetotransport behavior of ferromagnetic Au NPs

AB - The magnetic and electrical transport properties of regioregular poly(3-hexylthiophene)-capped Au nanoparticles (NPs) doped with iodine have been investigated to clarify the effectiveness of conductive polymer capping on the induction of ferromagnetism in Au. The room-temperature magnetization curve of the undoped polythiophene-capped Au NPs exhibits a clear hysteresis behavior with a coercive force of 160 Oe. The spontaneous magnetization normalized by the mass of Au is 2.0 × 10−2 emu/g. The spontaneous magnetization was found virtually unaffected by iodine doping, whereas the electrical conductivity is enhanced dramatically to ∼10 S/cm. Our results show that polythiophene capping could lead to spontaneous magnetic polarization in Au NPs, and the conductivity of the polymer capping does not affect the ferromagnetism of the Au nanoparticles, opening a possibility for further investigation into the magnetotransport behavior of ferromagnetic Au NPs

UR - http://www.elsevier.com/locate/engfailanal

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DO - 10.163/1.3562444

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 7

M1 - 07E328

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Ferromagnetism of polythiophene-capped Au nanoparticles

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