Ha Minjeong, Cañón Bermúdez Gilbert Santiago, Kosub Tobias, Mönch Ingolf, Zabila Yevhen, Oliveros Mata Eduardo Sergio, Illing Rico, Wang Yakun, Fassbender Jürgen, Makarov Denys
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Bautzner Landstrasse 400, Dresden, 01328, Germany.
The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, 31-342, Poland.
Adv Mater. 2021 Mar;33(12):e2005521. doi: 10.1002/adma.202005521. Epub 2021 Feb 2.
Highly compliant electronics, naturally conforming to human skin, represent a paradigm shift in the interplay with the surroundings. Solution-processable printing technologies are yet to be developed to comply with requirements to mechanical conformability of on-skin appliances. Here, it is demonstrated that high-performance spintronic elements can be printed on ultrathin 3 µm thick polymeric foils enabling the mechanically imperceptible printed magnetoelectronics, which can adapt to the periodic buckling surface to be biaxially stretched over 100%. They constitute the first example of printed and stretchable giant magnetoresistive sensors, revealing 2 orders of magnitude improvements in mechanical stability and sensitivity at small magnetic fields, compared to the state-of-the-art printed magnetoelectronics. The key enabler of this performance enhancement is the use of elastomeric triblock copolymers as a binder for the magnetosensitive paste. Even when bent to a radius of 16 µm, the sensors printed on ultrathin foils remain intact and possess unmatched sensitivity for printed magnetoelectronics of 3 T in a low magnetic field of 0.88 mT. The compliant printed sensors can be used as components of on-skin interactive electronics as it is demonstrated with a touchless control of virtual objects including zooming in and out of interactive maps and scrolling through electronic documents.
高度柔顺的电子器件能够自然地贴合人体皮肤，这代表了其与周围环境相互作用方式的范式转变。可溶液加工的印刷技术仍有待开发，以满足皮肤表面器件对机械柔顺性的要求。在此，我们证明了高性能的自旋电子元件可以印刷在3微米厚的超薄聚合物箔片上，从而实现机械上难以察觉的印刷磁电子器件，该器件能够适应周期性屈曲表面，实现超过100%的双轴拉伸。它们构成了印刷且可拉伸的巨磁阻传感器的首个实例，与现有印刷磁电子器件相比，在小磁场下机械稳定性和灵敏度提高了两个数量级。这种性能提升的关键因素是使用弹性体三嵌段共聚物作为磁敏浆料的粘合剂。即使弯曲到16微米的半径，印刷在超薄箔片上的传感器仍保持完好，并且在0.88毫特斯拉的低磁场中对印刷磁电子器件具有3特斯拉的无与伦比的灵敏度。如通过对虚拟物体的非接触控制（包括放大和缩小交互式地图以及滚动浏览电子文档）所展示的那样，柔顺的印刷传感器可用作皮肤表面交互式电子器件的组件。
