Anisotropic swelling of hydrogel nanowires based on poly(vinylpyrrolidone) fabricated by single‐particle nanofabrication technique |
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| Authors: | Satoshi Tsukuda Masaaki Omichi Masaki Sugimoto Akira Idesaki Vikas S Padalkar Shu Seki |
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| Institution: | 1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba‐ku, Sendai, Japan;2. Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma‐machi, Kanazawa, Ishikawa, Japan;3. Quantum Beam Science Directorate, Japan Atomic Energy Agency, Takasaki, Gunma, Japan;4. Department of Molecular Engineering, Graduate School of Engineering, Kyoto, University, Nishikyo‐ku, Kyoto, Japan |
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| Abstract: | We report a hydrogel nanowire based on poly(vinylpyrrolidone) (PVP) and N,N'‐methylenebis(acrylamide) (MBA), which have anisotropic swelling ratio for radius and length direction. The PVP/MBA nanowires were fabricated by single particle nanofabrication technique, which is a technique for the fabrication of polymeric nanowires using the single ion event, that cause the crosslinking reaction of polymer chains within the ion tracks along the ion paths; furthermore the size (length and radius) of the nanowires was controlled by changing the film thickness and amount of MBA crosslinker. The swelling behaviors in air and water were observed using atomic force microscopy. The PVP/MBA nanowires exhibited anisotropic swelling along the length and radius in aqueous environments, because the hydrogel nanowires consisted of crosslinked networks with inhomogeneous crosslinking points, which reflected the initial energy distribution from incident an ion within the ion track. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016 , 54, 1950–1956 |
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| Keywords: | swelling hydrogels radiation nanotechnology |
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