Plasmonic color printing has received significant attention owing to its advantages such as nonfading and nontoxic color expression, without necessitating the use of chemical dyes. Recently, color generation from laser-induced plasmonic nanostructures has been extensively explored because of its simplicity, cost-effectiveness, and large-scale processability. However, these methods usually utilize a top-down method that causes unexpected background colors. Here, we proposed a novel method of plasmonic color printing via a bottom-up type laser-induced photomodification process. In the proposed method, selective silver nanoparticles (Ag NPs) structure could be fabricated on a transparent substrate through a unique organometallic solution-based laser patterning process. A set of color palettes was formed on the basis of different processing parameters such as laser fluence, scanning speed, and baking time. This color change was verified by finite-difference time-domain (FDTD) simulations via monitoring the spectral peak shift of the localized surface plasmon resonance (LSPR) at Ag NPs. It was also confirmed that the colors can be fabricated at a relatively high scanning speed (≥10 mm/s) on a large substrate (>300 mm²). Since semitransparent color images can be patterned on various transparent substrates, this process will broaden the application range of laser-induced plasmonic color generation.

中文翻译：

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通过自下而上的激光诱导光改性工艺进行等离子彩色印刷

等离子彩色印刷由于其不褪色和无毒的色彩表现等优点而受到广泛关注，无需使用化学染料。最近，由于激光诱导的等离子体纳米结构的简单性、成本效益和大规模加工性，已经广泛探索了颜色生成。但是，这些方法通常使用自上而下的方法，这会导致意外的背景颜色。在这里，我们提出了一种通过自下而上的激光诱导光改性工艺进行等离子彩色印刷的新方法。在所提出的方法中，可以通过独特的基于有机金属溶液的激光图案化工艺在透明基板上制造选择性银纳米粒子 (Ag NPs) 结构。根据激光能量密度、扫描速度、烘烤时间等不同加工参数形成一组调色板。这种颜色变化通过有限差分时域 (FDTD) 模拟通过监测在 Ag NPs 处的局部表面等离子体共振 (LSPR) 的光谱峰移得到验证。还证实，可以在较大的基板 (>300 mm) 上以相对较高的扫描速度 (≥10 mm/s) 制造颜色² )。由于半透明彩色图像可以在各种透明基板上形成图案，这一过程将拓宽激光诱导等离子体颜色生成的应用范围。