Tunable Gas Sensing Gels by Cooperative Assembly

Abid Hussain, Ana T.S. Semeano, Susana I.C.J. Palma, Ana S. Pina, José Almeida, Bárbara F. Medrado, Ana C.C.S. Pádua, Ana L. Carvalho, Madalena Dionísio, Rosamaria W.C. Li, Hugo Gamboa, Rein V. Ulijn, Jonas Gruber, Ana C.A. Roque

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The cooperative assembly of biopolymers and small molecules can yield functional materials with precisely tunable properties. Here, the fabrication, characterization, and use of multicomponent hybrid gels as selective gas sensors are reported. The gels are composed of liquid crystal droplets self-assembled in the presence of ionic liquids, which further coassemble with biopolymers to form stable matrices. Each individual component can be varied and acts cooperatively to tune gels' structure and function. The unique molecular environment in hybrid gels is explored for supramolecular recognition of volatile compounds. Gels with distinct compositions are used as optical and electrical gas sensors, yielding a combinatorial response conceptually mimicking olfactory biological systems, and tested to distinguish volatile organic compounds and to quantify ethanol in automotive fuel. The gel response is rapid, reversible, and reproducible. These robust, versatile, modular, pliant electro-optical soft materials possess new possibilities in sensing triggered by chemical and physical stimuli.

Original languageEnglish
Article number1700803
JournalAdvanced Functional Materials
Volume27
Issue number27
DOIs
Publication statusPublished - 19 Jul 2017

Keywords

  • gas sensing
  • gelatin
  • ionic liquids
  • liquid crystals
  • self-assembly

Fingerprint Dive into the research topics of 'Tunable Gas Sensing Gels by Cooperative Assembly'. Together they form a unique fingerprint.

  • Cite this

    Hussain, A., Semeano, A. T. S., Palma, S. I. C. J., Pina, A. S., Almeida, J., Medrado, B. F., ... Roque, A. C. A. (2017). Tunable Gas Sensing Gels by Cooperative Assembly. Advanced Functional Materials, 27(27), [1700803]. https://doi.org/10.1002/adfm.201700803