Journal Article multimaterial fibers Research Support, U.S. Gov't, Non-P.H.S. thermal drawing 9000-70-8 Chalcogens Gelatin Glycerol Metals PDC6A3C0OX Research Support, Non-U.S. Gov't Review advanced fibers controlled delivery edible fibers fiber processes flexible and stretchable electronics food science and engineering food-grade materials and processes functional fibers functional textiles hybrid optical fibers magnetic polymer composites optoelectronic devices rheology semiconducting nanowires semiconductor fibers smart textiles soft actuators soft materials