文献类型：期刊文献

英文题名：Suppression of the Coffee Ring Effect with Undetectable Disturbance of the Deposit

作者：Sheng, Shiqi[1];Fang, Zhening[2];Gao, Shiyu[1];Chen, Ruoyang[1];Wang, Ying;Yang, Haijun[3];Fang, Haiping[1,4]

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]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil SSRF, Shanghai 201204, Peoples R China;[4]Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325001, Peoples R China

年份：2025

卷号：42

期号：2

外文期刊名：CHINESE PHYSICS LETTERS

收录：;EI(收录号：20252018407462);WOS:【SCI-EXPANDED(收录号:WOS:001435913400001)】；

基金：We thank Dr. Chen Hou for her help with the SEM experiments. We also acknowledge the support from beamlines 01B, 06B, and 07U, the User Experiment Assist System, and the Big Data Science Center, Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences.

语种：英文

外文关键词：Ammonium bicarbonate - Graphene oxide

摘要：Suppressing the coffee ring effect (CRE) of an aqueous suspension through manipulation without affecting the remaining deposit is highly desirable for practical applications; however, this is extremely challenging. Here, we demonstrate CRE suppression with undetectable disturbance of the deposit on carbon-based surfaces. This was achieved by adding ammonium bicarbonate (NH4HCO3), which benefits from the dissociation of NH4HCO3 to produce NH4+ , as well as its decomposition into NH3 and CO2 molecules. Surprisingly, NH4+ can also function as Na+/K+ to suppress the CRE through cation interactions, although its hydrate state is only partially positively charged. Moreover, we successfully applied this approach to enhance the morphology, resistance, and color uniformity of deposits of graphene oxide quantum dots, conductive inks, and organic dyes, respectively. This study provides a practical strategy for improving the performance of fabricated devices and paves the way for the development of high-accuracy manufacturing techniques in diverse industries.