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Title: Formation and diffusion characteristics of Pt clusters on graphene, 1H-MoS2 and 1T-TaS2
Authors: Özaydın, H. Duygu
Şahin, Hasan
Şenger, Ramazan Tuğrul
Peeters, François M.
Keywords: Graphene
Two-dimensional materials
Diffusion characteristics
Issue Date: Oct-2014
Publisher: John Wiley and Sons Inc.
Source: Özaydın, H.D., Şahin, H., Senger, R.T., and Peeters, F.M. (2014). Formation and diffusion characteristics of Pt clusters on graphene, 1H-MoS2 and 1T-TaS2. Annalen der Physik, 526(9-10), 423-429. doi:10.1002/andp.201400079
Abstract: Many experiments have revealed that the surfaces of graphene and graphene-like structures can play an active role as a host surface for clusterization of transition metal atoms. Motivated by these observations, we investigate theoretically the adsorption, diffusion and magnetic properties of Pt clusters on three different two-dimensional atomic crystals using first principles density functional theory. We found that monolayers of graphene, molybdenum disulfide (1H-MoS2) and tantalum disulfide (1T-TaS2) provide different nucleation characteristics for Pt cluster formation. At low temperatures, while the bridge site is the most favorable site where the growth of a Pt cluster starts on graphene, top-Mo and top-Ta sites are preferred on 1H-MoS2 and 1T-TaS2, respectively. Ground state structures and magnetic properties of Ptn clusters (n = 2,3,4) on three different monolayer crystal structures are obtained. We found that the formation of Pt2 dimer and a triangle-shaped Pt3 cluster perpendicular to the surface are favored over the three different surfaces. While bent rhombus shaped Pt4 is formed on graphene, the formation of tetrahedral shaped clusters are more favorable on 1H-MoS2 and 1T-TaS2. Our study of the formation of Ptn clusters on three different monolayers provides a gateway for further exploration of nanocluster formations on various surfaces.
ISSN: 0003-3804
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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