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Open AccessFeature PaperArticle

Study of Polydiacetylene-Poly (Ethylene Oxide) Electrospun Fibers Used as Biosensors

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Department of Design and Merchandising, Colorado State University, Fort Collins, CO 80523, USA
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Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA
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Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA
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Author to whom correspondence should be addressed.
Academic Editor: Dusan Losic
Materials 2016, 9(3), 202; https://doi.org/10.3390/ma9030202
Received: 31 January 2016 / Revised: 5 March 2016 / Accepted: 7 March 2016 / Published: 16 March 2016
(This article belongs to the Section Advanced Composites)
Polydiacetylene (PDA) is an attractive conjugated material for use in biosensors due to its unique characteristic of undergoing a blue-to-red color change in response to external stimuli. 10,12-Pentacosadiynoic acid (PCDA) and poly (ethylene oxide) (PEO) were used in this study to develop fiber composites via an electrospinning method at various mass ratios of PEO to PCDA, solution concentrations, and injection speeds. The PEO-PDA fibers in blue phase were obtained via photo-polymerization upon UV-light irritation. High mass ratios of PEO to PCDA, low polymer concentrations of spinning solution, and low injection speeds promoted fine fibers with small diameters and smooth surfaces. The colorimetric transition of the fibers was investigated when the fibers were heated at temperatures ranging from 25 °C to 120 °C. A color switch from blue to red in the fibers was observed when the fibers were heated at temperatures greater than 60 °C. The color transition was more sensitive in the fibers made with a low mass ratio of PEO to PCDA due to high fraction of PDA in the fibers. The large diameter fibers also promoted the color switch due to high reflectance area in the fibers. All of the fibers were analyzed using Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) and compared before and after the color change occurred. The colorimetric transitional mechanism is proposed to occur due to conformational changes in the PDA macromolecules. View Full-Text
Keywords: polydiacetylene; electrospun fiber; biosensor; color transformation polydiacetylene; electrospun fiber; biosensor; color transformation
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MDPI and ACS Style

Alam, A.K.M.M.; Yapor, J.P.; Reynolds, M.M.; Li, Y.V. Study of Polydiacetylene-Poly (Ethylene Oxide) Electrospun Fibers Used as Biosensors. Materials 2016, 9, 202.

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