Job title:
Postdoc in Biophysical Opto-Acoustics
Company:
Job description
Offer DescriptionSeveral recent review articles and recommendations from the European community are calling for greener biocomposites made from plant-derived fiber and crop-derived materials to advance a key sustainability goal. In photonics, recent awareness has granted the emergence of innovative solutions using chemically purified wood and silk extracts. In phononics however, no sustainable approach has been investigated because there has been no observation of phonon-based biological functions at the supramolecular scale, making phononic bioinspired strategies inoperative. In this project, we want to invent what we call biobased phononic materials (BPM).We have recently demonstrated that biological composites in the form of decellularized plant cell scaffolds can behave as phononic materials, including forbidding the propagation of elastic waves in select frequency ranges (i.e. band gaps). In these pioneering experiments, our biological composite was composed of a micron-thick onion cell epidermis with slender cell walls extruding up from it that resemble blind bore beehive structures. We measured the dispersion of sub-GHz surface acoustic waves (SAWs) in the onion composite (Fig. 1a), and revealed their interaction with compressional and flexural resonances of the wall structure, which open deep and wide band gaps (Fig. 1b).
In the frame the ANR project BiophoNonics, we have obtained a 1-year postdoctoral contract. The objective of this postdoc will first be to clarify the biological parameters that control the bandgap’s features. To do this we will use synthetic materials that mimic the plant’s structure. We will probe their acoustic response response using optoacoustic techniques, and compare the results with numerical simulations. In a second part of the project, we will perform imaging of acoustic vibration within plant epidermises to collocate cell walls and trapped acoustic energy. These two approaches should both improve our understanding of the acoustic behaviour of plant samples, and should lead to publications.RequirementsResearch Field Physics » Optics Education Level PhD or equivalentSkills/QualificationsThe postdoc will have to carry out the necessary optical assembly and implement the acquisition on plant samples engineered by the biologists. Comparison with numerical simulations with COMSOL should complement our understanding. This work will be supported by the expertise in optoacoustics of the host team.Specific RequirementsThe candidate will have a background in Physics/Engineering, with a focus on laser, acoustics or metamaterials. Knowledge in COMSOL is a plus. Will to work at the interface between physics and biology is required. Early career researchers are encouraged to apply.Languages ENGLISH Level ExcellentResearch Field Physics » Optics Years of Research Experience 1 – 4Additional InformationWork Location(s)Number of offers available 1 Company/Institute Université Claude Bernard Country European Union GeofieldWhere to apply E-mail[email protected]Contact CityVILLEURBANNE Cedex WebsiteStreet43, boulevard du 11 novembre 191869622STATUS: EXPIRED
Expected salary
Location
Villeurbanne, Rhône
Job date
Sat, 17 Feb 2024 02:51:16 GMT
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