| 主权项 |
1. An apparatus comprising:
a flow channel having a first end and a second end; a fluid flow controller for causing a carrier fluid in the flow channel to alternate between flowing in a forward direction from the first end to the second end and flowing in a reverse direction from the second end to the first end; and, a microstructure within the flow channel, the microstructure comprising one or more passages therein sized to deform particles in a carrier fluid in the flow channel as the particles pass through the microstructure, and configured such that less force is required to deform particles passing through the microstructure in the forward direction than to deform particles passing through the microstructure in the reverse direction. |
