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Stability of metal nanowires $(d \geq 15 nm)$ against electromigration

Bora, A and Bid, A and Raychaudhuri, AK (2007) Stability of metal nanowires $(d \geq 15 nm)$ against electromigration. In: Journal of Nanoscience and Nanotechnology, 7 (6). pp. 1831-1835.

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We have studied stability of metal nanowires against electromigration damage when they are subjected to high current density. Silver nanowires of diameter ranging from 15 nm to 100 nm were synthesized with electrochemical method using template route. Electromigration study was accompanied with in-situ low frequency electric resistance fluctuation or $1/f$ noise measurement in the nanowires. It was observed that nanowires with smaller diameter stayed without substantial damage even after 10 to 14 days of continuous stressing with a current of density of the order of $10^{12} A/m^2$, while those with larger diameter get damaged much sooner. Noise measurements show that for nanowires with smaller diameter, noise spectra remains almost same for the entire duration of current stressing whereas in case of nanowires of larger diameter, spectral power of noise $(S_v(f) \infty 1/f\alpha)$ as well as the frequency exponent, $\alpha$, increases as the electromigration process progresses. This is similar to that seen in metal films.

Item Type: Journal Article
Publication: Journal of Nanoscience and Nanotechnology
Publisher: American Scientific Publishers
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Keywords: Electromigration;Resistance Fluctuation;Noise
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 06 Aug 2007
Last Modified: 02 Feb 2012 09:30
URI: http://eprints.iisc.ac.in/id/eprint/11649

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