应陕西省微纳传感与测试技术创新团队负责人韦学勇教授邀请，巴黎狄德罗大学Laurent ROYON教授将于3月29日上午9点作学术报告，欢迎大家观看！

会议时间：2023/03/29 15:00(GMT+08:00)

ZOOM会议：876 5479 8947

会议密码：319289

报告内容简介

   Atmospheric water vapor is ubiquitous and represents a promising alternative to address global clean water scarcity. Atmosphere indeed contains a huge amount of water (12 900 km3). A promising approach is the use of passive radiative cooling materials, which can provide cooling power of 60-150 W/m2 during night-time applications. However, the experimental yields have been so far relatively modest (around 0,1-0,3 ℓm-2/night in average), far from reaching the ideal yield of about 1ℓ m-2/night. Several limitations indeed prevent harvesting large quantities of dew water.

   Surfaces must combine several characteristics to optimize the passive collection of dew water (without energy input and without external intervention), among which: (i) efficient radiative cooling capacities in the atmospheric window, (ii) controlled wetting properties, which favor the nucleation and growth of water droplets (or films), (iii) a geometry at the microscopic and/or macroscopic scale which facilitates the flow of droplets or films by gravity. The work presents the different investigations developped in the laboratory on the nature, properties and shape of dew water collecting surfaces.

报告人简介

Full Professor at University Paris Diderot, and leader of CEMU team of laboratory LIED (UMR 8236 CNRS), Paris, France.

Email: laurent.royon@u-paris.fr

   Laurent Royon is Full Professor at University Paris Diderot, and leader of CEMU team of laboratory LIED (UMR 8236 CNRS), in Paris, France. He obtained his PhD degree from University Paris Denis Diderot, France and then worked as post-doctoral research fellow in Ecole Polytechnique Montreal, Canada and associate professor at University de Marne la Vallee. Then he became a full professor at University Paris Denis Diderot since 2015. 

   He has published more than 50 peer-reviewed publications in international journals (PRE, Soft Matter, Langmuir …), 2 patents, 3 contributed book chapters and 31 communications. His research interests focus on heat and mass transfer processes with phase changes, fluid physics, rheology, soft matter, wetting and capillary phenomena, acoustic streaming. During 2014 – 2017, he was the coordinator of the “Eau Douce” project (“Idex” project).