材料科学
生物相容性
电极
印刷电子产品
涂层
刮擦
纳米技术
导电体
墨水池
柔性电子器件
可伸缩电子设备
数码产品
导电油墨
纳米颗粒
复合材料
薄板电阻
图层(电子)
冶金
电气工程
化学
物理化学
工程类
作者
Jie Qi,Hang Chen,Yuan Gao,Xingyu Jiang
标识
DOI:10.1021/acsami.3c03412
摘要
High biocompatibility and stability against water and scratch are crucial for liquid metal-based flexible electronics. Although previous studies have reported the chemical modification of liquid metal nanoparticles which can promote their water-stability and solution-processability, the modification process is complicated and hard to scale up. In particular, polydopamine (PD)-coated liquid metal nanoparticles (LMNPs) have not been used in flexible devices. We report the synthesis of the PD on LMNPs by thermal processing, which is controllable, fast, straightforward, and scalable. Because of the adhesiveness of PD, the PD@LM ink enables high-resolution printing on many substrates. The circuit printed by PD@LM shows high stability against repeated stretch in water (sustaining cardiomyocyte beating for 1 month─around 3 million times) and scratch. This conductive ink is highly biocompatible, conductive (4000 s/cm), and stretchable (up to 800% elongation). We cultured cardiomyocytes onto the PD@LM electrode and recorded the membrane potential change under electrical stimulation. For in vivo use, we fabricated a stable electrode to detect the electrocardiogram signal of a beating heart.
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