Laser Induced Coffee‐Ring Structure through Solid‐Liquid Transition for Color Printing (Small 6/2023)

Coffee‐Ring Structures In article number 2205696, Jianfeng Yan and co‐workers propose a strategy of laser induced transient solid‐liquid transition to fabricate coffee‐ring structures. Through modulating the transient state of metal from solid to liquid phase using ultrafast laser pulse train, the controllable fabrication of coffee‐ring structures is achieved. The coffee‐ring structure exhibit tunable structure color, which can be used for color printing.