Bubble power holds key to micro-pumps


By Zeeya Merali MAKING tiny gears and valves to miniaturise that most basic of machines, the pump, is a major headache for engineers developing micro-devices such as fuel cells for cellphones. Now scientists at Johns Hopkins University in Baltimore, Maryland, have side-stepped the problem by using collapsing bubbles to drive liquid around a device small enough to be integrated into a chip. Zhizhong Yin created the “blinking-bubble” pump in a 120-micrometre-wide liquid channel by warming a section towards one end of the channel to form a vapour bubble. As the bubble grows, it splits the liquid into two unequal parts. Then the heat is turned off,
  • 首页
  • 游艇租赁
  • 电话
  • 关于我们