PT - JOURNAL ARTICLE AU - Hu, Guohua AU - Yang, Lisong AU - Yang, Zongyin AU - Wang, Yubo AU - Jin, Xinxin AU - Dai, Jie AU - Wu, Qing AU - Liu, Shouhu AU - Zhu, Xiaoxi AU - Wang, Xiaoshan AU - Wu, Tien-Chun AU - Howe, Richard C. T. AU - Albrow-Owen, Tom AU - Ng, Leonard W. T. AU - Yang, Qing AU - Occhipinti, Luigi G. AU - Woodward, Robert I. AU - Kelleher, Edmund J. R. AU - Sun, Zhipei AU - Huang, Xiao AU - Zhang, Meng AU - Bain, Colin D. AU - Hasan, Tawfique TI - A general ink formulation of 2D crystals for wafer-scale inkjet printing AID - 10.1126/sciadv.aba5029 DP - 2020 Aug 01 TA - Science Advances PG - eaba5029 VI - 6 IP - 33 4099 - http://advances.sciencemag.org/content/6/33/eaba5029.short 4100 - http://advances.sciencemag.org/content/6/33/eaba5029.full SO - Sci Adv2020 Aug 01; 6 AB - Recent advances in inkjet printing of two-dimensional (2D) crystals show great promise for next-generation printed electronics development. Printing nonuniformity, however, results in poor reproducibility in device performance and remains a major impediment to their large-scale manufacturing. At the heart of this challenge lies the coffee-ring effect (CRE), ring-shaped nonuniform deposits formed during postdeposition drying. We present an experimental study of the drying mechanism of a binary solvent ink formulation. We show that Marangoni-enhanced spreading in this formulation inhibits contact line pinning and deforms the droplet shape to naturally suppress the capillary flows that give rise to the CRE. This general formulation supports uniform deposition of 2D crystals and their derivatives, enabling scalable and even wafer-scale device fabrication, moving them closer to industrial-level additive manufacturing.