文献类型：期刊文献

英文题名：Simultaneously Suppressing the Coffee Ring Effect of Solutes with Different Sizes

作者：Sheng, Shiqi[1];Fang, Zhening[2];Yang, Haijun[3,4,5];Fang, Haiping[1,4,5,6]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;[3]Shanghai Adv Res Inst, Chinese Acad Sci, Shanghai Synchrotron Radiat Facil SSRF, Shanghai 201204, Peoples R China;[4]Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China;[5]Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China;[6]Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325001, Peoples R China

年份：2023

卷号：127

期号：49

起止页码：10615

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY B

收录：;EI(收录号：20235115246345);WOS:【SCI-EXPANDED(收录号:WOS:001125231400001)】；

基金：The authors thank Ruoyang Chen, Yizhou Yang, Yingying Huang, Hao Wu, and Liuhua Mu for their constructive suggestions and helpful discussions. This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 12005062, 11974366, U1632135) and the Fundamental Research Funds for the Central Universities, China.

语种：英文

外文关键词：Particle size analysis

摘要：Suppressing the coffee ring effect (CRE), which improves the uniformity of deposition, has attracted great attention. Usually, a realistic system contains solutes of various sizes. Large particles preferentially settle onto the substrate under gravity, separated from small particles even when CRE is suppressed, which generates nonuniformity in another way. This hinders small particles from filling the gaps at the deposition-substrate interface, leaving a frail deposition. Here, the CRE of polydispersed solutes is simultaneously suppressed, and a more uniform deposition is achieved by suspending the drop together with adding trace amounts of cations. The gaps tend to be filled, which makes the deposition bind more tightly. Analysis shows that gravity coordinates with the interactions that mediate the attraction between particles and the substrate, resulting in the coinstantaneous adsorption of all particles. This work adds another dimension to the suppression of CRE, improving the uniformity of deposition in complex systems and paving the way for the development of techniques in diverse manufacturing industries.