The role of defects in solid state dewetting of ultrathin Ag film on Si(557). (15th March 2021)

• Record Type: Journal Article
• Authors: Chaika, A.N.; Bozhko, S.I.; Ionov, A.M.; Sveklo, I.; Postnova, E. Yu.; Semenov, V.N.; Bisht, A.; Rabkin, E.
• Is Part Of: Scripta materialia. Number 194(2021)
• Publication Date: 2021-03-15
• Subjects: Surface structure -- Thin films -- Surface reconstruction -- Scanning tunneling microscopy (STM) -- Dislocation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.113655
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We have studied the solid state dewetting of ten monolayers thick Ag film deposited on periodically patterned Si(557) surface. The annealing of the system in the ultra-high vacuum at the temperatures between 300 and 400 °C resulted in full agglomeration of the film and formation of faceted single crystalline Ag nanoparticles exhibiting bimodal size distribution. We demonstrated that some particles contain screw dislocations producing a step on the upper particle facet. We related the bimodality in particles distribution with the ability of dislocation-containing Ag particles to evolve by Ostwald ripening mechanism. Graphical abstract: Image, graphical abstract