Lubricant for Liquids
Friction may seem trivial when you are for example rubbing your head on the carpet but understanding how the molecules interact during friction just recently described. Friction seems to be comparable when working with fluids. For example if you have two viscous oils that are flowing along each other this movement will transform into heat. This energy is usually wasted in the process so making fluids that have less friction is always sought after. Likely, the French researchers in this article were rubbing their head on the carpet when they thought of this article. Potentially, some marbles were placed between their head and the carpet to make less friction. In our analogy if you replace marbles with say superhydrophobic beads you may be able to reduce the friction involved in this.