Microbristle in gels: Toward all-polymer reconfigurable hybrid surfaces

Philseok Kim, Lauren D. Zarzar, Xuanhe Zhao, Alexander Sidorenko, Joanna Aizenberg

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We report on the fabrication of biologically-inspired "smart" surfaces using hybrid architectures comprising polymer microbristle embedded in a hydrogel layer. The dynamic bending of the microposts - the passive structural element in the design - and their return to the upright orientation are achieved during the volume-phase transition of the hydrogel layer - the active element of the structure - upon hydration/dehydration. We compare the performance of the hybrid architectures bearing soft and stiff microposts and show that the use of soft polymeric materials results in bending actuation of the posts in cases where actuation of identically-sized posts of stiffer materials, such as silicon, would not have been possible. Modeling of the actuation process and the supporting experimental results confirm that the bending orientation of the microposts can be individually controlled by modulating the thickness gradients in the active hydrogel layer achieved by transferring micropatterns to the liquid-phase hydrogel precursor. Such procedures orchestrate coordinated actuation of the microbristle and make it possible to create elaborate reconfigurable micropatterns, such as opening/closing microflorets and microtraps. In combination with diverse hydrogel systems exhibiting response to various stimuli, these "smart" hybrid all-polymer architectures open a new avenue in advanced functional materials that harness the adaptive nature of these structures for various applications.

Original languageEnglish (US)
Pages (from-to)750-755
Number of pages6
JournalSoft Matter
Volume6
Issue number4
DOIs
StatePublished - Feb 17 2010

Fingerprint

Hydrogel
actuation
Polymers
Gels
gels
polymers
harnesses
Bearings (structural)
closing
dehydration
Functional materials
stimuli
hydration
Silicon
liquid phases
Dehydration
Hydration
gradients
fabrication
Phase transitions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Kim, Philseok ; Zarzar, Lauren D. ; Zhao, Xuanhe ; Sidorenko, Alexander ; Aizenberg, Joanna. / Microbristle in gels : Toward all-polymer reconfigurable hybrid surfaces. In: Soft Matter. 2010 ; Vol. 6, No. 4. pp. 750-755.
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abstract = "We report on the fabrication of biologically-inspired {"}smart{"} surfaces using hybrid architectures comprising polymer microbristle embedded in a hydrogel layer. The dynamic bending of the microposts - the passive structural element in the design - and their return to the upright orientation are achieved during the volume-phase transition of the hydrogel layer - the active element of the structure - upon hydration/dehydration. We compare the performance of the hybrid architectures bearing soft and stiff microposts and show that the use of soft polymeric materials results in bending actuation of the posts in cases where actuation of identically-sized posts of stiffer materials, such as silicon, would not have been possible. Modeling of the actuation process and the supporting experimental results confirm that the bending orientation of the microposts can be individually controlled by modulating the thickness gradients in the active hydrogel layer achieved by transferring micropatterns to the liquid-phase hydrogel precursor. Such procedures orchestrate coordinated actuation of the microbristle and make it possible to create elaborate reconfigurable micropatterns, such as opening/closing microflorets and microtraps. In combination with diverse hydrogel systems exhibiting response to various stimuli, these {"}smart{"} hybrid all-polymer architectures open a new avenue in advanced functional materials that harness the adaptive nature of these structures for various applications.",
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Kim, P, Zarzar, LD, Zhao, X, Sidorenko, A & Aizenberg, J 2010, 'Microbristle in gels: Toward all-polymer reconfigurable hybrid surfaces', Soft Matter, vol. 6, no. 4, pp. 750-755. https://doi.org/10.1039/b920392c

Microbristle in gels : Toward all-polymer reconfigurable hybrid surfaces. / Kim, Philseok; Zarzar, Lauren D.; Zhao, Xuanhe; Sidorenko, Alexander; Aizenberg, Joanna.

In: Soft Matter, Vol. 6, No. 4, 17.02.2010, p. 750-755.

Research output: Contribution to journalArticle

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