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Fabrication of Ag nanostructures by the systematic control of annealing temperature and duration on GaN (0001) via the solid state dewetting
Author(s) -
Pandey Puran,
Kunwar Sundar,
Sui Mao,
Li MingYu,
Zhang Quanzhen,
Lee Jihoon
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600702
Subject(s) - dewetting , materials science , annealing (glass) , ostwald ripening , sublimation (psychology) , nanostructure , hillock , nanotechnology , fabrication , photoluminescence , chemical engineering , raman spectroscopy , optoelectronics , analytical chemistry (journal) , thin film , composite material , optics , chemistry , psychology , engineering , psychotherapist , medicine , alternative medicine , physics , pathology , chromatography
The gradual evolution of Ag nanostructures in terms of the configuration, size, and density of via the solid state dewetting is demonstrated on GaN (0001) by the systematic control of annealing temperature and duration with various Ag film thickness. Upon the annealing between 150 and 700 °C with the 20 nm Ag film, the hillocks, voids, irregular, and round dome shaped Ag nanoparticles (NPs) are fabricated based on various growth mechanisms: i.e., thermal diffusion and sublimation as well as the surface energy minimization. On the other hand, along with the systematic control of annealing duration between 0 and 3600 s with 10 nm Ag film 700 °C, the Ag NPs show gradually decreased size and density based on the concurrent influence of the Ostwald's ripening and sublimation of Ag atoms. The Raman, photoluminescence, and reflectance spectroscopy of the resulting Ag NPs are characterized in accordance with the various morphology evolution of Ag nanostructures.