Physics – Condensed Matter – Materials Science
Scientific paper
2006-01-05
Phys. Rev. B 73, 035410 (2006)
Physics
Condensed Matter
Materials Science
6 pages, 5 figures
Scientific paper
10.1103/PhysRevB.73.035410
We measured the infrared vibrational properties of bulk and nanoparticle WS$_2$ in order to investigate the structure-property relations in these novel materials. In addition to the symmetry-breaking effects of local strain, nanoparticle curvature modifies the local charging environment of the bulk material. Performing a charge analysis on the \emph{xy}-polarized E$_{1u}$ vibrational mode, we find an approximate 1.5:1 intralayer charge difference between the layered 2H material and inorganic fullerene-like (IF) nanoparticles. This effective charge difference may impact the solid-state lubrication properties of nanoscale metal dichalcogenides.
Brown Shanique
Cao Jianfeng
Luttrell R. D.
Musfeldt J. L.
Rosentsveig R.
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