New method of wormlike motion lets gels wiggle through water
Monday, June 2, 2014 - 03:04
in Physics & Chemistry
A special hydrogel substance has been developed that can be equipped to detect bacteria, carry cargo and deliver medicine. A researcher used a worm's contracting and expanding motion to provide a way for gels to swim in water. He explains, "Using a hand-held laser, we were able to selectively and quickly shrink the hydrogel (a hydrophilic polymer gel comprised mostly of water) in desired areas. By inducing a shrinking/swelling cycle down the length of a hydrogel, we were able to successfully mimic peristaltic, or earthworm-inspired, locomotion in water."