Title: Synthesis of silver nanorings by atom beam sputtering

Authors: Satyabrata Mohapatra, Yogendra Kumar Mishra, Ambuj Tripathi, Debdulal Kabiraj, Devesh Kumar Avasthi

Addresses: School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, Dwarka, New Delhi 110075, India. ' Functional Nanomaterials, Institute for Materials Science, Faculty of Engineering CAU Kiel, Kaiserstr 2, 24143 Kiel, Germany. ' Inter University Accelerator Centre, Post Box 10502, New Delhi 110067, India. ' Inter University Accelerator Centre, Post Box 10502, New Delhi 110067, India. ' Inter University Accelerator Centre, Post Box 10502, New Delhi 110067, India

Abstract: Silver nanorings, evident by transmission electron microscopy and atomic force microscopy, were synthesised through self-assembly of Ag nanoparticles embedded in silica by atom beam co-sputtering. Optical absorption studies revealed localised surface plasmon resonance (LSPR) at ∼430 nm, which is in close agreement with our theoretical calculations. The dimensions of nanorings were found to be substrate dependent, which indicates that the diffusivity of Ag plays an important role in the self-assembly process. The Ag nanorings formation has been explained in terms of stress evolution in aggregates of Ag nanoparticles at surface, due to irradiation with energetic sputtered atoms.

Keywords: self-assembly; metal nanocomposites; silver nanorings; atom beam sputtering; synthesis; nanotechnology.

DOI: 10.1504/IJNM.2011.039959

International Journal of Nanomanufacturing, 2011 Vol.7 No.1, pp.21 - 29

Received: 30 Jul 2009
Accepted: 18 Oct 2010
Published online: 28 Feb 2015 *

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