科罗拉多大学博尔德分校的研究团队成功开发了一种名为PhotoTat的新型纹身墨水，可通过不同波长的光线激活或隐形1。该技术采用包裹三原色墨水的聚甲基丙烯酸甲酯纳米粒子制成，由光敏性染料构成1。研究成果已于2024年10月9日发表在期刊《Matter & Light》上1。
PhotoTat墨水系统包含蓝色、品红色和黄色三种原色通道1。在365纳米紫外线LED照射下，色素可在约2-3秒内被激活1。激活后的颜色在室内光线下可持续数小时到数天，但在强烈的户外阳光下会在数秒内消退1。这些墨水在皮肤内可保持1.4至2.2年的可切换性1。
目前，仅紫色PhotoTat墨水经过医学测试后实现商业化，定价为100美元一小瓶1。生物医学工程副教授卡森·布伦斯在自己的皮肤上进行了多次测试1。
Researchers at the University of Colorado Boulder have developed PhotoTat, a novel tattoo ink formulated with photosensitive dyes that can be activated or hidden using different wavelengths of light 1. The technology employs polymethyl methacrylate nanoparticles encasing three primary color inks—blue, magenta, and yellow—that activate within approximately 2 to 3 seconds when exposed to 365-nanometer ultraviolet LED light 1. Once activated, the pigments remain visible for hours to days indoors, but fade within seconds under intense outdoor sunlight 1.
The ink maintains its switchable properties within the skin for 1.4 to 2.2 years 1. Carson Bruns, an associate professor of biomedical engineering at the University of Colorado Boulder, has tested the technology multiple times on his own skin 1. The research was published on October 9, 2024, in the journal Matter & Light 1. Currently, only the purple PhotoTat ink has been commercialized following medical testing, priced at 100 dollars per vial 1.
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