Pre One:34. S. Yan, Y. Li, Y. Zhu, M. Liu, Q. Zhao, D. Yuan, G. Yun, S. Zhang, W. Wen, S. Y. Tang, Simple, low‐cost fabrication of semi‐circular channel using the surface tension of solder paste and its application to microfluidic valves, Electrophoresis, 2018, 39, 1460-1465.