Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 147, Issue 3, Pages 920-924Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2014.06.038
Keywords
Thin films; Irradiation effects; Nanostructures; Interface; Electron microscopy (SEM and TEM); Thermodynamic properties
Categories
Funding
- CSIR, New Delhi [CSIR-SRF-2011]
Ask authors/readers for more resources
The present experimental work provides the phenomenological approach to understand the dewetting in thin noble metal films with subsequent formation of nanoparticles (NPs) and embedding of NPs induced by ion irradiation. Au/polyethyleneterepthlate (PET) bilayers were irradiated with 150 keV Ar ions at varying fluences and were studied using scanning electron microscopy (SEM) and cross-sectional transmission electron microscopy (X-TEM). Thin Au film begins to dewet from the substrate after irradiation and subsequent irradiation results in spherical nanoparticles on the surface that at a fluence of 5 x 10(16) ions/cm(2) become embedded into the substrate. In addition to dewetting in thin films, synthesis and embedding of metal NPs by ion irradiation, the present article explores fundamental thermodynamic principles that govern these events systematically under the effect of irradiation. The results are explained on the basis of ion induced sputtering, thermal spike inducing local melting and of thermodynamic driving forces by minimization of the system free energy where contributions of surface and interfacial energies are considered with subsequent ion induced viscous flow in substrate. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available