X-ray magnetic circular dichroism and small angle neutron scattering study of thiol capped gold nanoparticles.

Journal Article · Sun Nov 01 04:00:00 EST 2009 · J. Nanosci. Nanotech.

DOI:https://doi.org/10.1166/jnn.2009.1877· OSTI ID:979876

de la Venta, J; Bouzas, V; Pucci, A; Laguna-Marco, M A; Haskel, D; Pinel, E F; Hoffmann, A; Lal, J; Bleuel, M; Ruggeri, G; de Julian, C; Garcia, M A

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 {center_dot} 10{sup -4} was found at the Au L{sub 3} edge of thiol capped Au NPs embedded in a polyethylene matrix for which Superconducting Quantum Interference Device (SQUID) magnetometry yielded a saturation magnetization, M{sub s}, of 0.06 emu/g{sub 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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 979876
• Report Number(s): ANL/MSD/JA-64788
• Journal Information: J. Nanosci. Nanotech., Journal Name: J. Nanosci. Nanotech. Journal Issue: 11 ; Nov. 2009 Vol. 9
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

42 ENGINEERING
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GOLD
MAGNETIC CIRCULAR DICHROISM
MAGNETIZATION
NEUTRONS
ORIGIN
POLYETHYLENES
RESOLUTION
SATURATION
SCATTERING
SENSITIVITY
SQUID DEVICES
THIOLS