Interfacial self-transportation via controlled wettability transition for directed self-assembly  

作　　者：Pan Tian Minghui Tan Guiqiang Zhu Dan Wang Guoxin Lu Mengjiao Cheng 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering&Beijing Laboratory of Biomedical Materials&Beijing Advanced Innovation Centre for Soft Matter Science and Engineering,Bejing University of Chemical Technology,Beijing 100029,China

出　　处：《Chinese Chemical Letters》2023年第12期491-494,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52122315,21972008);Beijing Nova Program(No.Z201100006820021).

摘　　要：Wettability transition is a significant responsive mechanism which is widely applied to construct smart materials and systems.The broad-spectrum responsiveness of the wettability transition makes it a promising way to expand innovative applications.Here,we develop a track-guided self-transportation system mediated by sequential wettability transition accompanied with capillary transportation.Alkaline fuel is loaded into polydimethylsiloxane(PDMS)cuboid to trigger the wettability transition of distributed superhydrophobic tracks laid in shallow water.After the wettability transition,the induced capillary force can propel the repetitive track-to-track transportation of PDMS.Importantly,the spacing between adjacent tracks is rationally designed based on multiple factors including threshold of wettability transition,diffusion kinetics and capillary interaction.Furthermore,the track-guided transportation system is applied to realize directed self-assembly of multiple PDMS building blocks for designated configuration,which increases the complexity and intelligence of self-assembly systems.

关 键 词：Wettability transition TRACKS Capillary force Self-transportation Directed self-assembly 

分 类 号：O641.3[理学—物理化学]