Temperature-responsive peristome-structured smart surface for the unidirectional controllable motion of large droplets  

作　　者：Yunyun Song Jialei Yang Xu Zhang Zhongqiang Zhang Xinghao Hu Guanggui Cheng Yan Liu Guojun Lv Jianning Ding 

机构地区：[1]Institute of Intelligent Flexible Mechatronics,School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,P.R.China [2]State Key Laboratory of Structural Analysis for Industrial Equipment,Department of Engineering Mechanics,Faculty of Vehicle Engineering and Mechanics,Dalian University of Technology,Dalian 116024,P.R.China [3]Key Laboratory of Bionic Engineering(Ministry of Education),Jilin University,Changchun 130022,P.R.China [4]School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,P.R.China [5]School of Mechanical Engineering,Yangzhou University,Yangzhou 225127 Jiangsu,P.R.China

出　　处：《Microsystems & Nanoengineering》2023年第5期219-232,共14页微系统与纳米工程（英文）

基　　金：the National Natural Science Foundation of China(Nos.52005222,12272151,and 52105057);Major Program of National Natural Science Foundation of China(NSFC)for Basic Theory and Key Technology of Tri-Co Robots(92248301);Natural Science Foundation of Jiangsu Province(Grant no.BK20200916);Key Research Project of Zhejiang lab(No.K2022NB0AC04);Open Fund for Key Laboratory of Bionic Engineering(Ministry of Education)of Jilin University(K202207);Qing Lan Project and 333 Project of Jiangsu Province.

摘　　要：The manipulation of fast,unidirectional motion for large droplets shows important applications in the fields of fog collection and biochemical reactions.However,driving large droplets(>5μL)to move directionally and quickly remains challenging due to the nonnegligible volume force.Herein,we fabricated a scalable,bionic peristome substrate with a microcavity width of 180μm using a 3D printing method,which could unidirectionally drive a large water droplet(~8μL)at a speed reaching 12.5 mm/s by temperature-responsive wettability.The substrate surface was grafted with PNIPAAm,which could reversibly change its wettability in response to temperature,thereby enabling a temperature-responsive smart surface that could regulate droplet movement in real-time by changing the temperature.A series of temperature-responsive smart patterns were designed to induce water transport along specific paths to further realize controllable droplet motion with the antibacterial treatment of predesignated areas.The ability to achieve temperature-responsive unidirectional motion and dynamic control of droplet movement could allow programmable fluidic biosensors and precision medical devices.

关 键 词：UNIDIRECTIONAL SURFACE MOTION 

分 类 号：TG14[一般工业技术—材料科学与工程]