Liquid transport with fluorescent particles. Finding “impurities” in layers. 蛍光粒子で液体輸送。層に隠された微量不純物も発見


乾燥した葉および紙(セルロース繊維)のような多孔質媒体中に流れる液体に蛍光微粒子を混入させておいて、その液体の輸送を「可視化」する技術。A technique in which fluorescent particles are mixed into a liquid flowing through a porous medium (tobacco leaf and paper(cellulose fiber)) to “visualize” the liquid transport.

Reference: Open Access Article

Liquid Transport of Heated Glycerol-Water Mixtures with Colloidal Fluorescent Particles through Multiple Biomass Layers. e-Journal of Surface Science and Nanotechnology (2022) Authors: Yosuke Asanuma, Tiara N. Pratiwi, Mitsuki Wada, Toshiaki Iwai, I. Wuled Lenggoro.

In this study, we report for the first time the use of colloidal fluorescent submicrometer-sized particles as tracers for microliter liquid transport through multilayered biomass. We showed that the in-plane spread and the trans-planar penetration of the liquid can be visualized by mapping the fluorescent particle distribution in each biomass layer using image analysis. The temperature and inter-layer connectivity were found to be vital factors determining the fate of the liquid transport. Inter-layer connectivity is influenced by both the physical connections among the layers and the property of the fluid filling the inter-layer pores. Utilizing this characteristic, we could use our visualization method to detect trace amounts of nano- to sub-micrometer impurities in one of the layers.