Traditional microfluidic devices use many techniques to generate fluid movement, but almost all rely on external application of force through a pump. This adds to the complexity of the device, and often requires extra fabrication steps.
In the Landers lab we have developed centrifugal microdevices that use a range of rotational speeds to generate fluid movement through the microfluidic architecture. This greatly reduces the complexity of the system, and allows the devices to be operated using inexpensive repurposed hardware. Currently we have used the components of a CD player, as well as 3D printed parts, to construct a compact rotating system for our microdevices that can also perform cell-phone analysis of samples.