通过原子力显微镜来表征纳米化环氧化GO的尺寸大小。制备步骤：将GO用超声细胞粉碎机进行纳米化，然后冷冻干燥，将冷冻干燥的样品于乙醇中超声分散，在烧杯中加入602A搅拌1h，并升温至70℃，逐滴滴加10ml 1mol/l的NaHO,反应6h，最后采用无水乙醇洗涤5-6次（4000r/m，5min）。

The size of nano-epoxidized GO was characterized by atomic force microscopy. Preparation steps: GO was nano-seeded with an ultrasonic cell pulverizer, then freeze-dried, the freeze-dried samples were ultrasonically dispersed in ethanol, 602A was added to the beaker and stirred for 1h, and the temperature was raised to 70 °C, 10ml of 1mol/l NaHo was added dropwise dropwise, the reaction was 6h, and finally washed 5-6 times (4000r/m, 5min) with absolute ethanol.