Restructuring of cobalt nanoparticles induced by formation and diffusion of monodisperse metal-sulfur complexes

Jakob Kibsgaard, K. Morgenstern, E. Laegsgaard, J. V. Lauritsen, Flemming Besenbacher

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Abstract

Time-resolved scanning tunneling microscopy (STM) is used to investigate a massive sulfur-induced transformation of a homogeneous array of similar to 2 nm Co nanoparticles into a new cobalt sulfide phase. The underlying atomistic mass-transport process is revealed and, surprisingly, found to be mediated exclusively by the formation and detachment of monosized Co3S4 complexes at the perimeter of the Co nanoparticles. The process is followed by fast diffusion, agglomeration of the complexes, and subsequent crystallization into a cobalt sulfide phase.
Original languageEnglish
Article number116104
JournalPhysical Review Letters
Volume100
Issue number11
Number of pages4
ISSN0031-9007
DOIs
Publication statusPublished - 2008
Externally publishedYes

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