Manganese dioxide (MnO₂) with small size is competent in sensing applications, but its synthesis generally adopts templates or in complex ways. Inkjet printing technique with excellent performance offers a versatile tool due to its stability, flexibility, economy. Herein, an inkjet printing method was developed for rapid synthesis of ultra-small MnO₂ nanosheets. The findings validated the feasibility of inkjet printing method for MnO₂ nanosheets synthesis and achieved the demand of small size and facile mode. Additionally, the limit of detection (LOD) of ultra-small MnO₂ nanosheets in glutathione (GSH) sensing achieved 0.26 μM, which was about 40% more sensitive than that of the typical MnO₂ nanosheets, enabling the establishment of a rapid and efficient modality for sensitive and selective GSH sensing. By virtue of the inkjet printing approach, the ultra-small MnO₂ nanosheets was obtained in a short time without complicated fabricating process. It can be foreseen that the proposed inkjet printing approach would facilitate the application prospects of ultra-small MnO₂ nanosheets in diverse fields. Such a facile approach may open new avenues for synthesis of ultra-small or ultrafine nanomaterials.

二氧化锰（MnO ₂）体积小，可用于传感应用，但其合成一般采用模板或复杂方式。性能卓越的喷墨打印技术因其稳定性、灵活性、经济性而提供了一种多功能工具。在此，开发了一种用于快速合成超小MnO ₂纳米片的喷墨打印方法。研究结果验证了喷墨打印方法合成MnO ₂纳米片的可行性，实现了小尺寸和简便模式的需求。此外，超小 MnO ₂纳米片在谷胱甘肽 (GSH) 传感中的检测限 (LOD) 达到 0.26 μM，比典型的 MnO _{2灵敏度高约 40%}纳米片，能够为敏感和选择性的 GSH 传感建立快速有效的模式。凭借喷墨打印的方法，无需复杂的制造工艺，即可在短时间内获得超小MnO _{2纳米片。}可以预见，所提出的喷墨打印方法将促进超小MnO ₂纳米片在不同领域的应用前景。这种简便的方法可能为超小或超细纳米材料的合成开辟新途径。