The sensor devices are becoming an essential aspect of electronics, while an accurate, economical, and printable device is constantly in high demand. Particularly, it is indispensable to develop the printed flexible sensor electronics with a fast response time, high sensitivity, and selectivity, as well as hybrid scalable manufacturing at a low cost. Here we demonstrate a printable and flexible oxygen amperometric sensor capable of operating at room temperature, in which the printed metal features are homogenously interlinked to form a dense and highly conductive mesh structure followed by a flexible hydrogel electrolyte layer. The printed oxygen sensor shows a response time of less than 2 s with a sensor response of 94.6% and the oxygen gas detection levels as low as 1.56 ppm. The sensing attributes of the printed devices with the added wireless feature show an immense promise for monitoring the oxygen levels, which provide a new rapid-sensing pathway for the packaging processes and remote monitoring devices for averting hazardous conditions.

传感器设备正成为电子学的重要方面，而对精确，经济和可打印的设备的需求却一直很高。特别地，开发具有快速响应时间，高灵敏度和选择性以及低成本的混合可缩放制造的印刷柔性传感器电子设备是必不可少的。在这里，我们演示了一种可在室温下运行的可打印且灵活的氧气安培传感器，其中，已打印的金属部件均质地相互连接，以形成致密且高度导电的网状结构，然后是柔性的水凝胶电解质层。印刷的氧气传感器显示的响应时间少于2 s，传感器响应为94.6％，氧气检测水平低至1.56 ppm。