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Phys. Rev. Lett. 98, 164502 (2007) [4 pages]

Gravity-Free Hydraulic Jumps and Metal Femtoliter Cups

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Manikandan Mathur1, Ratul DasGupta1, N. R. Selvi2, Neena Susan John2, G. U. Kulkarni2,*,†, and Rama Govindarajan1,*,‡
1Engineering Mechanics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
2Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India

Received 25 July 2006; revised 22 February 2007; published 17 April 2007

Hydraulic jumps created by gravity are seen everyday in the kitchen sink. We show that at small scales a circular hydraulic jump can be created in the absence of gravity by surface tension. The theory is motivated by our experimental finding of a height discontinuity in spreading submicron molten metal droplets created by pulsed-laser ablation. By careful control of initial conditions, this leads to solid femtoliter cups of gold, silver, copper, niobium, and tin.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.164502
DOI:
10.1103/PhysRevLett.98.164502
PACS:
47.61.−k, 47.85.Dh

*To whom correspondence should be addressed.

†Email address: kulkarni@jncasr.ac.in

‡Email address: rama@jncasr.ac.in

 
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