title: Gravity-free hydraulic jumps and metal femtoliter cups.
abstract: 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.
authors.affiliation: Engineering Mechanics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
authors.forename: Manikandan
authors.initials: M
authors.lastname: Mathur
authors.forename: Ratul
authors.initials: R
authors.lastname: DasGupta
authors.forename: N R
authors.initials: NR
authors.lastname: Selvi
authors.forename: Neena Susan
authors.initials: NS
authors.lastname: John
authors.forename: G U
authors.initials: GU
authors.lastname: Kulkarni
authors.forename: Rama
authors.initials: R
authors.lastname: Govindarajan