Interference colors hold significant importance in optics and arts. Current methods for printing interference colors entail complex procedures and large‐scale printing systems for the scarcity of inks that exhibit both sensitivity and tunability to external fields. The production of highly transparent inks capable of rendering transmissive colors has presented ongoing challenges. Here, a type of paramagnetic ink based on 2D materials that exhibit polychrome in one magnetic field is invented. By precisely manipulating the doping ratio of magnetic elements within titanate nanosheets, the magneto‐optical sensitivity named Cotton–Mouton coefficient is engineerable from 728 to a record high value of 3272 m−1 T−2, with negligible influence on its intrinsic wide optical bandgap. Combined with the sensitive and controllable magneto‐responsiveness of the ink, modulate and non‐invasively print transmissive interference colors using small permanent magnets are precised. This work paves the way for preparing transmissive interference colors in an energy‐saving and damage‐free manner, which can expand its use in widespread areas.

中文翻译：

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使用 2D 材料墨水进行透射干涉色的可调且非侵入式打印


干涉色在光学和艺术中具有重要意义。目前印刷干涉色的方法需要复杂的程序和大规模的印刷系统，因为缺乏对外部场表现出敏感性和可调性的墨水。能够呈现透射颜色的高度透明油墨的生产一直面临着挑战。在这里，发明了一种基于二维材料的顺磁墨水，该墨水在一个磁场中表现出多色。通过精确控制钛酸盐纳米片中磁性元素的掺杂比例，被称为 Cotton-Mouton 系数的磁光灵敏度可从 728 设计到创纪录的高值 3272 m−1 T−2，对其固有的宽光学带隙的影响可以忽略不计。结合墨水的敏感且可控的磁响应性，使用小型永磁体精确调制和非侵入性地打印透射干涉色。这项工作为以节能、无损伤的方式制备透射干涉色铺平了道路，可以扩大其广泛应用。