Light-driven liquids, particles, and interfaces : from microfluidics to coffee art
Orateur : Damien Baijl
UPMC, IUF, Ecole Normale Supérieure, Paris
Résumé : We make liquids move by creating interfacial energy gradients that are controlled by light [1], which is simply achieved by exploiting the photochemical properties of photosensitive surfactants [2]. Following this way, light is used to drive, manipulate and combine discrete reactive drops [3,4] (digital optofluidics) or to address the fluid flow behaviour inside microchannels, such as drop generation [5] and microfluidic mixing[6] (light-driven microfluidics). We also use light to control particle deposition from evaporating colloidal suspension drops by exploiting either colloidal interfacial trapping [7,8] or light-driven interfacial flows [9], resulting in a broad variety of highly controllable patterns, even from complex formulations such as actual coffee
- 1. D. Baigl, Lab Chip 12, 3637 (2012) - 2. A. Diguet et al., Chem. Eur. J. 16, 11890 (2010) - 3. A. Diguet et al., Angew. Chem. Int. Ed. 48, 9281 (2009) - 4. A. Venancio-Marques et al., Langmuir 30, 4207–4212 (2014) - 5. A. Diguet et al., Lab Chip 11, 2666 (2011) - 6. A. Venancio-Marques et al., J. Am. Chem. Soc. 135, 3218 (2013) - 7. M. Anyfantakis, D. Baigl, Angew. Chem. Int. Ed. 53, 14077 (2014) - 8. M. Anyfantakis et al., Langmuir 31, 4113 (2015) - 9. S. N. Varanakkottu et al., Submitted.
Date et lieu : le Vendredi 6 Novembre 2015 à 11h00, salle 250 IUSTI