Researchers from Cornell University have fabricated flexible tubes with 100 nanometre diameters. The tubes are ten times narrower than those used in today's microfluidic systems.
They could be used to make stacked, interconnected networks to move fluids around chemical sensing and analysing biochips. The tubes are made by depositing a particular type of polymer into tiny silicon grooves. The polymer closes across the gap at the top to create a tube.