Microfluidics in a Rotating CD

In this work we present microfluidics on a CD platform. Using this approach multiple samples can be analysed simultaneously without any tubing connected to the chip. Valving techniques based on surface tension and surface energy is presented together with a passive valving technique that allow liquids with low surface tension. To better understand the motion of discrete liquid plugs in the nanolitre range in the chip, we have compared experimental results on the hysteresis influence on microfluidic resistance with those from theoretical calculations.