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Title: Structural and morphological modifications of AgInSe 2 and Ag 2 Se composite thin films on 140 MeV Ni ion irradiation
Authors: Panda R.
Panda M.
Rath H.
Dash B.N.
Asokan K.
Singh U.P.
Naik R.
Mishra N.C.
Published in: Applied Surface Science
Abstract: Evolution of the structure and surface morphology of thin films composed of two selenium based chalcogenide phases, AgInSe 2 and Ag 2 Se on 140 MeV ion irradiation is reported. At this high energy, the projectile Ni ions sputtered the surface of the films through energy deposition to the target electrons. The sputtering led to decrease of silver and selenium concentration, but did not affect indium concentration. Surface analysis by field emission scanning electron microscopy study revealed nanoparticles of widely varying shapes and sizes on the surface of the films. Irradiation did not affect the particle size distribution which peaked at ~100 nm. The two phases, AgInSe 2 and Ag 2 Se exhibited different sensitivity to 140 MeV Ni ion irradiations. While Ag 2 Se phase was insensitive, the AgInSe 2 phase showed complex structural modifications at intermediate fluences, finally getting amorphized at high ion fluences. Analysis of the fluence dependence of Grazing Incidence X-ray Diffraction (GIXRD) peak area of AgInSe 2 phase indicated that each ion that penetrated the film, created an amorphous column of 1.6 nm radius. Surrounding the amorphous column, a cylindrical crystalline AgInSe 2 region of radius 8.2 nm, but with reduced lattice parameters formed. High resolution transmission electron microscopy image also confirmed registration of amorphized tracks and the modified crystalline region of similar radii around the path of 140 MeV Ni ions in a grain of AgInSe 2 as obtained from GIXRD study. © 2019 Elsevier B.V.
Citation: Applied Surface Science (2019), 479(): 997-1005
Issue Date: 2019
Publisher: Elsevier B.V.
Keywords: Chalcogenides
Ion tracks
Swift Heavy Ion Irradiation
ISSN: 1694332
Author Scopus IDs: 49864183100
Author Affiliations: Panda, R., Department of Physics, Utkal University, Bhubaneswar, 751004, India
Panda, M., Department of Physics, Utkal University, Bhubaneswar, 751004, India
Rath, H., Department of Physics, Utkal University, Bhubaneswar, 751004, India
Dash, B.N., Department of Physics, Salipur College, Salipur, 754202, India
Asokan, K., Inter-University Accelerator Centre, New Delhi, 110067, India
Singh, U.P., KIIT University, Bhubaneswar, 751024, India
Naik, R., Department of Physics, Utkal University, Bhubaneswar, 751004, India
Mishra, N.C., Department of Physics, Utkal University, Bhubaneswar, 751004, India, Department of Physics, U.N. Autonomous College of Sc. and Tech, Adaspur, 754011, India
Corresponding Author: Mishra, N.C.; Department of Physics, Utkal UniversityIndia; email:
Appears in Collections:Journal Publications [CY]

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