Structural colors are promising candidates for their antifading and eco-friendly characteristics. However, high cost and complicated processing inevitably hinder their development. Here, we propose a facile full-color structural-color inkjet printing strategy with a single transparent ink from the common polymer materials. This structural color arisen from total internal reflections is prepared by digitally printing the dome-shaped microstructure (microdome) with well-controlled morphology. By controlling the ink volume and substrate wettability, the microdome color can be continuously regulated across whole visible regions. The gamut, saturation, and lightness of the printed structural-color image are precisely adjusted via the programmable arrangement of different microdomes. With the advantages of simple manufacturing and widely available inks, this color printing approach presents great potential in imaging, decoration, sensing, and biocompatible photonics.

中文翻译：

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使用单一透明墨水轻松进行全彩色打印

结构颜色因其抗褪色和环保特性而成为有希望的候选者。然而，高昂的成本和复杂的加工工艺不可避免地阻碍了它们的发展。在这里，我们提出了一种简单的全彩色结构色喷墨打印策略，使用来自普通聚合物材料的单一透明墨水。这种由全内反射产生的结构颜色是通过数字印刷具有良好控制形态的圆顶形微结构（microdome）来制备的。通过控制墨水量和基材润湿性，可以在整个可见区域连续调节微穹顶颜色。打印的结构彩色图像的色域、饱和度和亮度通过不同微球的可编程排列进行精确调整。具有制造简单、油墨广泛使用的优点，