The conversion of mechanical deformation into electrical signals is a widely used principle for various relevant applications. Facile & scalable fabrication, ultrahigh-sensitivity, low-response time and uninterrupted performance under severe conditions are hallmarks of an efficient strain-sensor that would be suitable for realistic application. In the past, various approaches were introduced to achieve high gauge factor—mainly associated with a large tensile deformation. But, in reality, a flexible strain sensor that displays a high gauge factor at low applied strain and remains efficient under practically relevant diverse and challenging conditions would be more appropriate for unambiguous and effective monitoring of human motions and other relevant applications. But, a low-strain sensor with ultrahigh sensitivity and durability is yet to be introduced in the literature. Here, a metal-free, chemically reactive and conductive ink is unprecedentedly introduced following a 1,4-conjugate addition reaction. Furthermore, a strategic integration of a chemically reactive porous paper with the prepared conductive ink allowed the development of a chemically reactive and conductive interface that allowed desired post covalent modification with selected alkylamines under ambient conditions. Taking advantage of the spatially selective deposition of the prepared ink on chemically recative paper and the ability of post covalent modification of the prepared ink, an abrasion tolerant superhydrophobic & conductive patterned interface was developed for achieving a low-strain (below 0.2%) based flexible strain sensor with an ultrahigh sensitivity (gauge factor ∼18 300) and low response time (8 ms). The external low-strain induced cracks on the flexible & durable superhydrophobic and conductive patterned interface provided a facile basis for real-time & wireless monitoring of slow, fast, weak and strong human motions & expressions—under diverse conditions, including continuous aqueous exposures, physical abrasions etc.

中文翻译：

---

耐磨、不可拉伸和超防水的导电和超灵敏图案，用于识别各种条件下慢、快、弱和强的人体运动

将机械变形转换为电信号是各种相关应用中广泛使用的原理。简便且可扩展的制造、超高灵敏度、低响应时间和恶劣条件下的不间断性能是适用于实际应用的高效应变传感器的标志。过去，引入了各种方法来实现高规格系数——主要与大的拉伸变形有关。但是，实际上，在低施加应变下显示高规格系数并在实际相关的多样化和具有挑战性的条件下保持高效的柔性应变传感器将更适合明确和有效地监测人体运动和其他相关应用。但，具有超高灵敏度和耐用性的低应变传感器尚未在文献中介绍。在这里，在 1,4-共轭加成反应之后，前所未有地引入了一种无金属、具有化学反应性和导电性的墨水。此外，化学反应性多孔纸与制备的导电油墨的战略整合允许开发化学反应性和导电界面，该界面允许在环境条件下用选定的烷基胺进行所需的共价后修饰。利用制备的油墨在化学反应纸上的空间选择性沉积和制备油墨的后共价改性能力，开发了一种耐磨的超疏水导电图案化界面，以实现低应变（低于 0. 2%）的柔性应变传感器，具有超高灵敏度（测量因子~18 300）和低响应时间（8 ms）。柔性耐用的超疏水和导电图案化界面上的外部低应变诱导裂纹为在各种条件下（包括连续水暴露，物理擦伤等等。