Synchrotron x-ray diffraction measurements of strain in metallic nanoparticles with oxide shells.

Journal Article · Thu Feb 04 00:00:00 EST 2010 · J. Phys. D

DOI:https://doi.org/10.1088/0022-3727/43/7/075301· OSTI ID:993703

Ingham, B; Hendy, S C; Fong, D D; Fuoss, P H; Eastman, J A; Lassesson, A; Tee, K C; Convers, P Y; Brown, S A; Ryan, M P; Toney, M F; London, Imperial Coll

We describe synchrotron x-ray diffraction measurements of strain in Cu and Pd metal nanoparticles (1.7-40 nm diameter) both with an air-formed oxide shell and after reduction of the oxide by treatment in a hydrogen-containing atmosphere. Oxide removal is evident from x-ray diffraction (for Cu) and x-ray absorption spectroscopy (for Pd). A simple model that uses bulk elastic properties is applied to each system. In the Pd case the model predictions agree well with the experiment. For Cu the observed strains are much smaller than predicted. This discrepancy is attributed to (a) the presence of multiple grains within the Cu particles and (b) the incoherency of the oxide with the metal core.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); New Zealand Foundation for Research Science and Technology
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 993703
• Report Number(s): ANL/MSD/JA-68495; TRN: US1008114
• Journal Information: J. Phys. D, Vol. 43, Issue Feb. 4, 2010
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ABSORPTION SPECTROSCOPY
ELASTICITY
OXIDES
REMOVAL
STRAINS
SYNCHROTRONS
X-RAY DIFFRACTION