Gravity-free hydraulic jumps and metal femtocups
  Hydraulic jumps created by gravity are seen every day 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, we show that this leads to solid femtolitre cups of gold, silver, copper, niobium and tin. 
Rama Govindarajan, Manikandan Mathur, Ratul DasGupta, N.R. Selvi,   Neena Susan John and G.U. Kulkarni