This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
New Technique Sorts Nanotubes by Length . In schematic of NIST's length separation technique for carbon nanotubes the nanotubes start at the bottom of dense fluid When spun in centrifuge the nanotubes begin to migrate through the fluid driven by their buoyancy but the longer ones move faster spreading them out by length Photos shows