A biocompatible and highly stretchable optical fiber has now been created from hydrogel – an elastic, rubbery material composed mostly of water. The fiber, which is as bendable as a rope of licorice, may one day be implanted in the body to deliver therapeutic pulses of light or light up at the first sign of disease.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2016/10/161017151212.htm
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