Size-controlled fabrication of polydiacetylene-embedded microfibers on a microfluidic chip.

Imsung Yoo, Simon Song, Bora Yoon, Jong-Man Kim

Department of Mechanical Engineering, Hanyang University, Seoul 133-791, Korea.

Macromolecular rapid communications 2012 Aug 14

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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. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Citation

Imsung Yoo, Simon Song, Bora Yoon, Jong-Man Kim. Size-controlled fabrication of polydiacetylene-embedded microfibers on a microfluidic chip. Macromolecular rapid communications. 2012 Aug 14;33(15):1256-61