Helical Microfilaments with Alternating Imprinted Intrinsic Curvatures

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Abstract

There has been an intense research for developing techniques that can produce filaments with helical shapes, given the widespread of potential applications. In this work, how helices with different curvatures can be precisely imprinted in microfilaments is shown. It is also shown that using this technique, it is possible to produce, in a single fiber, helices with different curvatures. This striking and innovative behavior is observed when one side of the stretched filaments is irradiated with UV light, modifying the mechanical properties at surface. Upon release, the regions with higher curvature start to curl first, while regions with lower intrinsic curvature remain stretched until start to curl later. The results presented here can be important to understand why structures adopt a helical shape in general, which can be of interest in nanotechnology, biomolecular science, or even to understand why plant filaments curl. (Figure presented.).

Original languageEnglish
Article number1600700
JournalMacromolecular Rapid Communications
Volume38
Issue number5
DOIs
Publication statusPublished - 1 Mar 2017

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Nanotechnology
Ultraviolet radiation
Mechanical properties
Fibers

Keywords

  • electrospinning
  • helices
  • intrinsic curvature
  • urethane/urea elastic microfilaments

Cite this

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title = "Helical Microfilaments with Alternating Imprinted Intrinsic Curvatures",
abstract = "There has been an intense research for developing techniques that can produce filaments with helical shapes, given the widespread of potential applications. In this work, how helices with different curvatures can be precisely imprinted in microfilaments is shown. It is also shown that using this technique, it is possible to produce, in a single fiber, helices with different curvatures. This striking and innovative behavior is observed when one side of the stretched filaments is irradiated with UV light, modifying the mechanical properties at surface. Upon release, the regions with higher curvature start to curl first, while regions with lower intrinsic curvature remain stretched until start to curl later. The results presented here can be important to understand why structures adopt a helical shape in general, which can be of interest in nanotechnology, biomolecular science, or even to understand why plant filaments curl. (Figure presented.).",
keywords = "electrospinning, helices, intrinsic curvature, urethane/urea elastic microfilaments",
author = "Silva, {Pedro Emanuel Santos} and Godinho, {Maria Helena}",
note = "The authors gratefully acknowledge Portuguese Science and Technology Foundation (FCT) for supporting this research through contracts UID/CTM/50025/2013 (LA0025). P.E.S.S. acknowledges FCT for grant SFRH/BD/76369/2011. M.H.G. acknowledges PTDC/CTM-BIO/6178/2014.",
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T1 - Helical Microfilaments with Alternating Imprinted Intrinsic Curvatures

AU - Silva, Pedro Emanuel Santos

AU - Godinho, Maria Helena

N1 - The authors gratefully acknowledge Portuguese Science and Technology Foundation (FCT) for supporting this research through contracts UID/CTM/50025/2013 (LA0025). P.E.S.S. acknowledges FCT for grant SFRH/BD/76369/2011. M.H.G. acknowledges PTDC/CTM-BIO/6178/2014.

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Y1 - 2017/3/1

N2 - There has been an intense research for developing techniques that can produce filaments with helical shapes, given the widespread of potential applications. In this work, how helices with different curvatures can be precisely imprinted in microfilaments is shown. It is also shown that using this technique, it is possible to produce, in a single fiber, helices with different curvatures. This striking and innovative behavior is observed when one side of the stretched filaments is irradiated with UV light, modifying the mechanical properties at surface. Upon release, the regions with higher curvature start to curl first, while regions with lower intrinsic curvature remain stretched until start to curl later. The results presented here can be important to understand why structures adopt a helical shape in general, which can be of interest in nanotechnology, biomolecular science, or even to understand why plant filaments curl. (Figure presented.).

AB - There has been an intense research for developing techniques that can produce filaments with helical shapes, given the widespread of potential applications. In this work, how helices with different curvatures can be precisely imprinted in microfilaments is shown. It is also shown that using this technique, it is possible to produce, in a single fiber, helices with different curvatures. This striking and innovative behavior is observed when one side of the stretched filaments is irradiated with UV light, modifying the mechanical properties at surface. Upon release, the regions with higher curvature start to curl first, while regions with lower intrinsic curvature remain stretched until start to curl later. The results presented here can be important to understand why structures adopt a helical shape in general, which can be of interest in nanotechnology, biomolecular science, or even to understand why plant filaments curl. (Figure presented.).

KW - electrospinning

KW - helices

KW - intrinsic curvature

KW - urethane/urea elastic microfilaments

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