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The Microflusa project receives funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 664823
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MICROFLUSA attends MRS Fall Meeting and Exhibition

Dec 15, 2017

We explore the possibilities of fabricating photonic materials using the self-organisation of soft matter at the optical wave length scale. Hyperuniform materials, being disordered systems with suppressed long-scale fluctuations have been demonstrated to exhibit interesting photonic properties such as transparency for optically dense materials or photonic bandgap. In our project we study a jammed packing of bidisperse oil droplets in water. They are produced in a PDMS microfluidic chip and directly assembled in a microfluidic channel. By varying the fluid pressures, we manage to sharply control the droplet production (size ratio, number ratio) and thereby govern the structural properties of the obtained jammed material. We monitor various defects that prevent the system to be hyperuniform and investigate their influence on the structure factor. Our results show that at appropriate experimental conditions droplets self-organize in disordered hyperuniform patterns. Our electromagnetic simulations also show that the obtained material can be transparent while staying optically dense. As far as we know, the proposed material is one of the first examples of experimentally made hyperuniform materials. We hope that our studies will help to establish a new way of disordered photonic material production.

 

The Materials Research Society (MRS) is an organization of materials researchers worldwide that promotes communication for the advancement of interdisciplinary materials research and technology to improve the quality of life.

 

Dr. Joshua Recouvier attended the Fall Meeting in Boston, Massachussets, between 26/11/2017 and 1/12/2017 on behalf of ESPCI and the MICROFLUSA project, and presented a oral presentation regarding the procedure of making Photonic materials with Microfluidics and also Droplet Generation.


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