Fan Fu, Chen Lei, Zhou Yu, Duan Huigao
College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, PR China.
Greater Bay Area Institute for Innovation, Hunan University, Guangzhou 511300, PR China.
ACS Appl Mater Interfaces. 2024 May 22;16(20):26824-26832. doi: 10.1021/acsami.4c05828. Epub 2024 May 11.
Flexible electronics have gained significant attention as an innovative solution to meet the growing need for information collection from the human body and the environment. However, a critical challenge lies in the need for a transfer printing technique that can fabricate rigid and brittle devices on flexible organic substrates. Here, we develop a multiscale transfer printing technique using an ultraviolet-curable shape memory polymer (SMP) that serves as both the stamp and the receiver substrate. The SMP demonstrates exceptional mechanical performance with toughness at room temperature and remarkable flexibility near its glass transition temperature. The SMP material exhibits an impressive shape recovery ratio and remarkable adhesion switchability. We demonstrate robust transfer printing of diverse objects with different materials and morphologies and in situ transfer of multiscale metallic structures. In addition, the in situ fabricated transparent hyperthermia patches with embedded metal grids are demonstrated, offering potential application in the field of sensors, wearable devices, and electronic skin.
柔性电子器件作为一种创新解决方案，已获得了广泛关注，以满足从人体和环境中收集信息的日益增长的需求。然而，一个关键挑战在于需要一种转移印刷技术，该技术能够在柔性有机基板上制造刚性且易碎的器件。在此，我们开发了一种多尺度转移印刷技术，该技术使用紫外线可固化形状记忆聚合物（SMP），它既用作印章又用作接收基板。SMP在室温下具有韧性，在其玻璃化转变温度附近具有出色的柔韧性，展现出卓越的机械性能。SMP材料具有令人印象深刻的形状恢复率和显著的粘附开关特性。我们展示了对具有不同材料和形态的各种物体进行稳健的转移印刷以及多尺度金属结构的原位转移。此外，还展示了原位制造的带有嵌入式金属网格的透明热疗贴片，为传感器、可穿戴设备和电子皮肤领域提供了潜在应用。
