文献类型：期刊文献

英文题名：Evaporation-controlled one-dimensional material enrichment in a bioinspired microfluidic channel

作者：Mou, Junjie[1];Hu, Kami[1,2];Huang, Xing[3];He, Hui[2];Hou, Ying[1];Xia, Haoming[1];Zheng, Purui[2];Qu, Yixiao[2];Li, Doudou[4];Zhang, Min[1];Chen, Ruoyang[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Zhejiang Sci Tech Univ, Fash Design Coll Ist Marangoni, Sch Int Educ, Zhejiang 310018, Peoples R China;[3]Hangzhou City Univ, Zhejiang Prov Engn Ctr Integrated Mfg Technol & In, Sch Engn, Hangzhou 310015, Zhejiang, Peoples R China;[4]Shanghai Univ Med & Hlth Sci, Sch Clin Med, Shanghai 201318, Peoples R China

年份：2027

卷号：338

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001852276200001)】；

基金：This work is sponsored by Shanghai Pujiang Program (No. 23PJ1401800), the Fundamental Research Funds of Zhejiang Sci-Tech University (No.26192182-Y) , China National University Student Innovation & Entrepreneurship Development Program (No. 11332932662601 and No.11332932662610), the National Natural Science Foundation of China (12435001), and Shanghai Science and Technology Innovation Action Plan (No. 23JC1401400).

语种：英文

外文关键词："Coffee ring" effect; One-dimensional control of liquid flow; Targeted material enrichment

摘要：Plant transpiration is a ubiquitous process in which water evaporating from open leaf stomata generates tension, driving the upward flow of ion-containing liquid through enclosed xylem vessels. Unlike the drop evaporation on an unconfined surface, where the conventional "coffee ring" effect deposits materials in a ring-shaped pattern, plant transpiration can concentrate materials more efficiently at one desired site. Here, we design a bioinspired microfluidic channel comprising a long enclosed flow section and a short open evaporation region to control the distribution of evaporation rate for achieving material enrichment at one desired site. This strategy can concentrate a wide range of materials, including molecular solutes (e.g., methylene blue), polystyrene nanospheres, and microscale substances (e.g., polystyrene microspheres and Escherichia coli), at a predetermined site. Notably, it enriches over 80% of suspended bacteria in the open region, significantly outperforming the conventional "coffee ring" effect (similar to 20%). This high enrichment enables rapid bacterial detection at concentrations as low as similar to 300 CFU mL(-1). By simply harnessing evaporation, this bioinspired strategy offers new insights into directional material transport and high-efficiency enrichment, providing a versatile route for targeted material deposition with promising applications in trace and ultratrace analysis.