Lattice parameter evolution in Pt nanoparticles during photo-thermally induced sintering and grain growth

Journal Article · Thu Apr 20 00:00:00 EDT 2017 · Journal of Physics and Chemistry of Solids

DOI:https://doi.org/10.1016/j.jpcs.2017.04.009· OSTI ID:1367892

Kelly, B. G.; Loether, A.; DiChiara, A. D.; Henning, R.; DeCamp, M. F.; Unruh, K. M.

An in-situ optical pump/x-ray probe technique has been used to study the size dependent lattice parameter of Pt nanoparticles subjected to picosecond duration optical laser pulses. The as-prepared Pt nanoparticles exhibited a contracted lattice parameter consistent with the response of an isolated elastic sphere to a compressive surface stress. During photo-thermally induced sintering and grain growth, however, the Pt lattice parameter did not evolve with the inverse particle size dependence predicted by simple surface stress models. Lastly, the observed behavior could be attributed to the combined effects of a compressive surface/interface stress and a tensile stress arising from intergranular material.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH); National Science Foundation (NSF)
• Grant/Contract Number: AC02-06CH11357; DMR140076; R24GM111072
• OSTI ID: 1367892
• Alternate ID(s): OSTI ID: 1413389
• Journal Information: Journal of Physics and Chemistry of Solids, Vol. 108, Issue C; ISSN 0022-3697
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
Laser annealing
Intergranular stress
Lattice parameter
Nanostructured materials
Surface/interface stress