Surface Coloring and Plasmonic Information Encryption at 50000 dpi Enabled by Direct Femtosecond Laser Printing

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2024-09-27 DOI:10.1021/acs.nanolett.4c03576

Vasily Lapidas, Artem Cherepakhin, Dmitriy Storozhenko, Evgeny L. Gurevich, Alexey Zhizhchenko, Aleksandr A. Kuchmizhak

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引用次数: 0

Abstract

Femtosecond (fs) laser pulses drive matter into a highly nonequilibrium state, allowing precise sculpturing of irradiated surface sites with sophisticated nanomorphologies. Here, we used fs-laser patterning to create diverse plasmonic morphologies on the top Au layer of the metal–insulator–metal sandwich. Mutual action of laser-driven thermomechanical effects and ultrafast solid-to-liquid transition allows control of the morphology resulting in pronounced surface reflectivity modulation, i.e., in a structural color effect. This enables template-free high-resolution color printing at a superior lateral resolution up to 50000 dots per inch and facile tunability of the color tone and saturation. Moreover, precise control over the orientation of the printed nanostructures within subwavelength lattices allows modulation of their local plasmonic response encrypting the optical information within the colorful images. The hidden information can be unveiled using a facile cross-polarized optical visualization scheme, rendering the proposed method with extra modalities combining high resolution information encryption, coloring, and security labeling.

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通过直接飞秒激光打印实现 50000 dpi 的表面着色和等离子信息加密

飞秒（fs）激光脉冲可使物质进入高度非平衡状态，从而精确地雕刻出具有复杂纳米形态的照射表面。在这里，我们利用 fs 激光图案化技术在金属-绝缘体-金属夹层的顶部金层上创建了多种质子形态。激光驱动的热机械效应和超快固液转换的相互影响可以控制形态，从而产生明显的表面反射率调制，即结构色彩效应。这样就能实现无模板高分辨率彩色打印，横向分辨率高达 50000 点/英寸，并能方便地调节色调和饱和度。此外，通过精确控制亚波长晶格内印刷纳米结构的取向，可以调制其局部等离子响应，从而加密彩色图像中的光学信息。利用简单的交叉偏振光学可视化方案就能揭示隐藏的信息，从而使所提出的方法具有结合高分辨率信息加密、着色和安全标签的额外模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.