title: Size-controlled fabrication of polydiacetylene-embedded microfibers on a microfluidic chip.
abstract: A microfluidic technique was employed to fabricate polydiacetylene (PDA)-embedded hydrogel microfibers. By taking advantage of calcium ion-induced insoluble hydrogel formation, supramolecularly assembled diacetylene (DA)-surfactant complexes were successfully immobilized in the calcium alginate fibers. Thus, instantaneous microfiber formation was observed when the core flow of DA supramolecules-containing alginate solution met the sheath flow of calcium ions. UV irradiation of the resulting fibers afforded blue colored PDAs, and the formation of a conjugated polymer was confirmed by heat-induced phase transition and by Raman spectroscopy. By adjusting the core and sheath flow rates, PDA-embedded hydrogel fibers of various sizes were obtained.
authors.affiliation: Department of Mechanical Engineering, Hanyang University, Seoul 133-791, Korea.
authors.forename: Imsung
authors.initials: I
authors.lastname: Yoo
authors.forename: Simon
authors.initials: S
authors.lastname: Song
authors.forename: Bora
authors.initials: B
authors.lastname: Yoon
authors.forename: Jong-Man
authors.initials: JM
authors.lastname: Kim
mesh_terms: D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000138:chemical synthesis / Q000737:chemistry; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D010316:Particle Size; D000078789:Polyacetylene Polymer; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D053279:Polyynes / Q000138:chemical synthesis / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D014466:Ultraviolet Rays
chemical_list: D000078789:Polyacetylene Polymer; D011108:Polymers; D053279:Polyynes; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; C082361:polydiacetylene