Kang Tae-Hyung, Chang Hochan, Choi Dongwon, Kim Soonwoo, Moon Jihee, Lim Jung Ah, Lee Ki-Young, Yi Hyunjung
Post-Silicon Semiconductor Institute , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.
Department of Energy Engineering , Hanyang University , Seoul 04763 , Republic of Korea.
Nano Lett. 2019 Jun 12;19(6):3684-3691. doi: 10.1021/acs.nanolett.9b00764. Epub 2019 May 23.
Transfer-printing enables the assembly of functional nanomaterials on unconventional substrates with a desired layout in a controllable manner. However, transfer-printing to substrates with complex surfaces remains a challenge. Herein, we show that hydrogels serve as effective template material platforms for the assembly and transfer-printing of conductive nanonetwork patterns for flexible sensors on various topographic surfaces in a very simple yet versatile manner. The non-adherence, nanoporous structure, and molding capability of the hydrophilic hydrogel enable the assembly of conductive nanonetwork patterns on the hydrogel surface and transfer of the nanonetworks onto various flexible and topographic substrates. Flexible strain sensors and pressure sensors that monitor finger motions and arterial pulses are successfully demonstrated using the hydrogel-templated approach. The rich chemistry of polymeric networks, facile molding capability, and biocompatibility of hydrogels could be further combined with additive technology for hydrogels and electronic materials for emerging four-dimensional functional materials and soft bioelectronics.
转移印刷能够以可控的方式将功能性纳米材料组装在具有所需布局的非常规基板上。然而，将转移印刷应用于具有复杂表面的基板仍然是一项挑战。在此，我们表明水凝胶作为有效的模板材料平台，能够以非常简单且通用的方式在各种地形表面上组装和转移印刷用于柔性传感器的导电纳米网络图案。亲水性水凝胶的非粘附性、纳米多孔结构和成型能力使得能够在水凝胶表面组装导电纳米网络图案，并将纳米网络转移到各种柔性和地形基板上。使用水凝胶模板方法成功展示了监测手指运动和动脉脉搏的柔性应变传感器和压力传感器。聚合物网络丰富的化学性质、简便的成型能力以及水凝胶的生物相容性可以进一步与水凝胶和电子材料的添加剂技术相结合，用于新兴的四维功能材料和软生物电子学。
