Study of formation of Cu nanoparticle using Swift heavy ions

Varma, Ranjana S. ; Kothari, D. C. ; Choudhari, R. J. ; Kumar, Ravi ; Tewari, R. ; Dey, G. K. (2009) Study of formation of Cu nanoparticle using Swift heavy ions Surface and Coatings Technology, 203 (17-18). pp. 2468-2471. ISSN 0257-8972

Full text not available from this repository.

Official URL:

Related URL:


In this paper, we present the use of keV and MeV ion beam irradiations and post-irradiation annealing to form Cu nanoparticles in fused silica glass. The sequence of process being: low energy irradiation of fused silica substrate, Cu thin film coating, SHI irradiation and annealing. Fused silica substrates were irradiated using 30 keV argon ions at fluences of 1 × 1017 ion/cm2. 10 nm Cu films were deposited on the low energy irradiated fused silica. These thin films coated fused silica samples were then irradiated using 120 MeV Ag9+ ions at fluences ranging from 4 × 1013 to 1 × 1014 ion/cm2. The irradiated samples were subjected to isochronal annealing in argon gas flow from 400 K to 1200 K for 30 min. The average sizes of Cu nanoparticles were estimated from optical absorption spectra using Mie's theory. The sizes of the Cu nanoparticles were also confirmed from GAXRD and TEM measurements. Post-irradiation annealing results indicate that the formation of Cu3 nanocluster is favored at annealing temperature of about 700 K. High temperature annealing at 1200 K causes the formation of Cu4 clusters as well as Cu nanoparticles (larger clusters). After annealing at 1200 K, for the sample 120 MeV Ag9+ irradiated with high dose (1 × 1014 ion/cm2) only Cu nanoparticles are formed. The study suggests that irradiation induced defects provide nucleation sites for the formation of nanoparticles, latent tracks provide fast diffusion channels for Cu and, annealing provides required energy for the diffusion.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Swift Heavy Ion Irradiation; Fused Silica; Nanoparticles; Optical Absorption; Mie's Theory GAXRD; TEM
ID Code:82277
Deposited On:10 Feb 2012 04:54
Last Modified:10 Feb 2012 04:54

Repository Staff Only: item control page