X-ray Magnetic Circular Dichroism and Small Angle Neutron Scattering Studies of Thiol Capped Gold Nanoparticles

Authors: de la Venta, J.; Bouzas, V.; Pucci, A.; Laguna-Marco, M.A.; Haskel, D.; te Velthuis, S.G.E.; Hoffmann, A.; Lal, J.; Bleuel, M.; Ruggeri, G.; de Julián Fernández, C.; García, M.A.

Source: Journal of Nanoscience and Nanotechnology, Volume 9, Number 11, November 2009 , pp. 6434-6438(5)

Publisher: American Scientific Publishers

Key:

- Free Content

- New Content

- Subscribed Content

- Free Trial Content

Abstract:

X-ray magnetic circular dichroism (XMCD) and Small Angle Neutron Scattering (SANS) measurements were performed on thiol capped Au nanoparticles (NPs) embedded into polyethylene. An XMCD signal of 0.8 · 10⁻⁴ was found at the Au L₃ edge of thiol capped Au NPs embedded in a polyethylene matrix for which Superconducting Quantum Interference Device (SQUID) magnetometry yielded a saturation magnetization, M_S, of 0.06 emu/g_Au. SANS measurements showed that the 3.2 nm average-diameter nanoparticles are 28% polydispersed, but no detectable SANS magnetic signal was found with the resolution and sensitivity accessible with the neutron experiment. A comparison with previous experiments carried out on Au NPs and multilayers, yield to different values between XMCD signals and magnetization measured by SQUID magnetometer. We discuss the origin of those differences.

Keywords: GOLD NANOPARTICLES; X-RAY MAGNETIC CIRCULAR DICHROISM (XMCD); SMALL ANGLE NEUTRON SCATTERING (SANS)

Document Type: Research article

DOI: 10.1166/jnn.2009.1877

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$113.00 plus tax Refund Policy