Abstract The recent development of 3D highly porous laser-induced graphene (LIG) has drawn significant attention for numerous sensing applications. In particular, novel gas sensing platforms based on stretchable LIG patterns with self-heating capabilities have been demonstrated as a simple alternative to interdigitated electrodes (IDEs) for integrating gas-sensitive nanomaterials. However, their direct performance comparison with the IDEs is unclear. In this paper, the sensing performance of nanomaterials with various specific surface areas between the LIG patterns and IDEs are compared directly. Molybdenum disulfide (MoS2) @ reduced graphene oxide (rGO) was synthesized with controllable size and morphology for nitrogen dioxide (NO2) sensing. When dispersing MoS2@rGO on an IDE integrated on a soft silicone polymeric substrate, the stretchable gas sensor exhibited mechanical robustness upon stretching and a significantly large signal-to-noise ratio (SNR) for rapid detection of 10 ppb NO2. The MoS2@rGO nanocomposite was integrated on a stretchable 3D porous LIG pattern yielding an extraordinarily high SNR of 1026.9 to NO2 of 2 ppm. Considering the high SNR of over 60 to NO2 of 10 ppb, the novel LIG gas sensing platform with a simple fabrication process shows a great promise to test nanomaterials and enable stretchable bio-integrated gas sensors for monitoring of the health and environment.

中文翻译：

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基于 rGO/MoS2 纳米复合材料的可拉伸、超灵敏和低温 NO2 传感器

摘要 3D 高度多孔激光诱导石墨烯 (LIG) 的最新发展引起了众多传感应用的极大关注。特别是，基于具有自加热能力的可拉伸 LIG 图案的新型气体传感平台已被证明是用于集成气敏纳米材料的叉指电极 (IDE) 的简单替代品。但是，它们与 IDE 的直接性能比较尚不清楚。在本文中，直接比较了 LIG 图案和 IDE 之间具有各种比表面积的纳米材料的传感性能。合成二硫化钼 (MoS2) @ 还原氧化石墨烯 (rGO)，其尺寸和形态可控，用于二氧化氮 (NO2) 传感。当将 MoS2@rGO 分散在集成在软有机硅聚合物基材上的 IDE 上时，可拉伸气体传感器在拉伸时表现出机械稳健性和显着大的信噪比 (SNR)，可快速检测 10 ppb NO2。MoS2@rGO 纳米复合材料集成在可拉伸的 3D 多孔 LIG 图案上，产生了 1026.9 至 2 ppm 的 NO2 的极高 SNR。考虑到超过 60 到 10 ppb 的 NO2 的高信噪比，具有简单制造工艺的新型 LIG 气体传感平台显示出测试纳米材料和启用可拉伸生物集成气体传感器以监测健康和环境的巨大希望。