Controlling the Coffee Ring Effect on Graphene and Polymer by Cations

作     者：Haijun Yang Yizhou Yang Shiqi Sheng Binghai Wen Nan Sheng Xing Liu Rongzheng Wan Long Yan Zhengchi Hou Xiaoling Lei Guosheng Shi Haiping Fang 杨海军;杨一舟;盛世奇;闻炳海;盛楠;刘星;万荣正;闫隆;侯铮迟;雷晓玲;石国升;方海平

作者机构：Shanghai Synchrotron Radiation FacilityZhangjiang Laboratory(SSRFZJLab)Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204 Shanghai Applied Radiation Institute and State Key Lab Advanced Special SteelShanghai UniversityShanghai 200444 Guangxi Key Lab of Multisource Information Mining&SecurityGuangxi Normal UniversityGuilin 541004 Division of Interfacial WaterCAS Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800 School of ScienceEast China University of Science and TechnologyShanghai 200237 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2020年第37卷第2期

页      面：78-81页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the National Natural Science Foundation of China under Grant Nos.U1632135,U1832170,11862003,11474299,11574339,U1932123,and 11722548 the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(Nos.QYZDJ-SSW-SLH053 and QYZDJ-SSW-SLH019) the Key Research Program of the Chinese Academy of Sciences(No.KJZDEW-M03) 

主　　题：uniformly adsorbed adding 

摘      要：Recently,there are great efforts that have been taken to suppressing/controlling the coffee ring effect,but it is of challenge to achieve inexpensive and efficient control with less disturbance,suitable for scalable production and highly enhancing the printing/dyeing color *** only adding trace amounts of salt into the suspensions,here we experimentally achieve the facile and highly efficient control of the coffee ring effect of suspended matter on substrates of graphene,natural graphite,and polyethylene terephthalate ***,friction force measurements show that ion-controlled uniform patterns also greatly enhance color *** dynamics simulations reveal that,due to strong hydrated cation-π interactions between hydrated cations and aromatic rings in the substrate surface,the suspended matters are adsorbed on the surfaces mediated by cations so that the suspended matters are uniformly *** findings will open new avenues for fabricating functional patterns on graphene substrates and will benefit practical applications including printing,coating,and dyeing.