Losslessand efficient robotic grasping is becoming increasinglyimportant with the widespread application of intelligent roboticsin warehouse transportation, human healthcare, and domestic services.However, current sensors for feedback of grasping behavior are greatlyrestricted by high manufacturing cost, large volume and mass, complexcircuit, and signal crosstalk. To solve these problems, here, we preparelightweight distance sensor-based reduced graphene oxide (rGO)/MXene–rGOcoaxial microfibers with interface buffer to assist lossless graspingof a robotic manipulator. The as-fabricated distance microsensor exhibitsa high sensitivity of 91.2 m –1 in the distance rangeof 50–300 μm, a fast response time of 116 ms, a highresolution of 5 μm, and good stability in 500 cycles. Furthermore,the high-performance and lightweight microsensor is installed on therobotic manipulator to reflect the grasp state by the displacementimposed on the sensor. By establishing the correlation between themicrosensing signal and the grasp state, the safe, non-destructive,and effective grasp and release of the