Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus, Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, P. R. China.
Adv Mater. 2020 Aug;32(31):e2000165. doi: 10.1002/adma.202000165. Epub 2020 Jun 25.
Ink-based processes, which enable scalable fabrication of flexible devices based on nanomaterials, are one of the practical approaches for the production of wearable electronics. However, carbon nanotubes (CNTs), which possess great potential for flexible electronics, are facing challenges for use in inks due to their low dispersity in most solvents and suspicious cytotoxicity. Here, a stable and biocompatible CNT ink, which is stabilized by sustainable silk sericin and free from any artificial chemicals, is reported. The ink shows stability up to months, which can be attributed to the formation of sericin-CNT (SSCNT) hybrid through non-covalent interactions. It is demonstrated that the SSCNT ink can be used for fabricating versatile circuits on textile, paper, and plastic films through various techniques. As proofs of concept, electrocardiogram electrodes, breath sensors, and electrochemical sensors for monitoring human health and activity are fabricated, demonstrating the great potential of the SSCNT ink for smart wearables.
基于纳米材料的喷墨工艺为可伸缩柔性器件的制造提供了一种实用方法，是可穿戴电子产品生产的实用方法之一。然而，由于在大多数溶剂中的分散性低以及可疑的细胞毒性，在用于油墨时，碳纳米管（CNT）在柔性电子产品方面具有很大的潜力，但面临挑战。在这里，报告了一种稳定且具有生物相容性的 CNT 油墨，该油墨由可持续的丝胶蛋白稳定，并且不含任何人工化学品。油墨的稳定性长达数月，这归因于通过非共价相互作用形成丝胶蛋白-CNT（SSCNT）杂化。已经证明，SSCNT 油墨可以通过各种技术在纺织品、纸张和塑料薄膜上制造各种电路。作为概念验证，已经制造出心电图电极、呼吸传感器和用于监测人体健康和活动的电化学传感器，这证明了 SSCNT 油墨在智能可穿戴设备方面的巨大潜力。
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