Stimuli-responsive hydrogels embedding mechanichal metamaterials for high sensitive biochemical sensors

Shota Yamawaki, Mio Tsuchiya, Hiroaki Onoe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes a novel approach to magnify the shrink/swell degree of stimuli-responsive hydrogels with micro-scale mechanical metamaterials. The mechanical matematerial fabricated by two-photon stereolithography can be embedded in a structural-color stimuli-responsive hydrogels to amplify the sensitivity (the change in structural color) (Figure 1). To prove this concept, we here constructed micro-scale mesh-like structures with negative poisson ratio. By responding to an applied displacement of 'z = 50 μm, this structure expanded to 'x = 90 μm, showing its displacement amplification. The fabricated structures embedded in poly-N-isopropylacrylamide (PNIPAM) hydrogel showed that the shrinkage of the PNIPAM hydrogel successfully drive the embedded mechanical-metamaterial structures. We believe that this system would be an effective approach to increase the sensitivity of the structural color gel sensors for practical applications.

Original languageEnglish
Title of host publicationMicroTAS 2020 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences
PublisherChemical and Biological Microsystems Society
Pages593-594
Number of pages2
ISBN (Electronic)9781733419017
Publication statusPublished - 2020
Event24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020 - Virtual, Online
Duration: 2020 Oct 42020 Oct 9

Publication series

NameMicroTAS 2020 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences

Conference

Conference24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020
CityVirtual, Online
Period20/10/420/10/9

Keywords

  • Biosensor
  • Hydrogel
  • Mechanical metamaterial
  • Negative poisson ratio

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Bioengineering
  • Chemistry(all)
  • Control and Systems Engineering

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