Assessment of environmental spectral ellipsometry for characterising fluid-induced colour changes in natural photonic structures

Research output: Contribution to journalArticle

Abstract

Porous photonic structures found in several living organisms are known to display colour changes induced upon contact with liquids, vapours and gases. Usually these changes are due to physico-chemical phenomena such as the swelling of the structure enacted by the fluids, vapour physisorption on the pore walls, capillary condensation or a combination of them. Generally, the porous structures are open to outside, leading to fast fluid exchanges with the surrounding environment and consequently fast colour changes. In this article, we first introduce fluid-induced optical changes in living organisms exhibiting porous photonic structures. We explore then the potentiality of environmental ellipsometry for the first time in the context of natural photonic structures through the investigation of the optical response of the male cerulean chafer beetle Hoplia coerulea (Scarabaeidae) upon contact with water, 2-propanol and toluene vapours. In contrast with most of the investigated photonic structures, this beetle's structure is encased by an envelope that mediates liquid exchanges with the environment. Such a study is of great interest in order to understand the underlying biological functions behind these changes as well as in order to develop bioinspired applications such as gas sensors and other environment-responsive coatings.

Original languageEnglish
Pages (from-to)4987 - 4997
Number of pages11
JournalMaterials Today Proceedings
Volume4
Issue number4
DOIs
Publication statusPublished - 2017

Keywords

  • Structural colours
  • photonic crystals
  • optical sensors
  • photonic bandgap materials
  • natural photonic crystal
  • colour
  • ellipsometry
  • Natural photonic crystal
  • Photonic crystals
  • Colour
  • Ellipsometry
  • Photonic bandgap materials
  • Optical sensors

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  • Projects

    Equipment

  • Morphology - Imaging

    Charles Nicaise (Manager) & Francesca Cecchet (Manager)

    Technological Platform Morphology - Imaging

    Facility/equipment: Technological Platform

  • Activities

    • 4 Participation in conference
    • 2 Invited talk
    • 2 Oral presentation

    Belgian Physical Society (BPS) General Scientific Meeting 2017

    Sébastien Mouchet (Poster)

    17 May 2017

    Activity: Participating in or organising an event typesParticipation in conference

    Plymouth Marine Laboratory – University of Exeter Research Day

    Sébastien Mouchet (Poster)

    24 Apr 2017

    Activity: Participating in or organising an event typesParticipation in conference

    Optical Biomimetics

    Sébastien Mouchet (Speaker)

    24 Apr 2017

    Activity: Participating in or organising an event typesParticipation in conference

    Student Theses

    Mécanismes fondamentaux de la coloration structurale : addiction et induction de couleurs

    Author: Mouchet, S., 29 Sep 2015

    Supervisor: Deparis, O. (Supervisor), Su, B. L. (Jury), Lepere, M. (President), Vukusic, P. (External person) (Jury), Berthier, S. (External person) (Jury) & Voué, M. (External person) (Jury)

    Student thesis: Doc typesDoctor of Sciences

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