Separate DMF solutions 24 mM of 1-aminopyrene (AP) and disuccinimidyl suberate (DSS) were stirred for 2 h. Then the long-chain AD molecules were formed when these two solutions were mixed at a molar ratio of 1:1 and stirred for 12 h. MrGO-AD sheets were obtained when MrGO sheets were immersed in the AD solution for 2 h, followed by washing six times with DMF and then six times with ethanol. The rGO-AD and MGO-AD sheets were prepared is an analogous manner