In recent year,with the functionalization technology of carbon nanotubes(CNTs) growing,CNTs have attracted increasing attention in the application of analytical chemistry.The noncovalent functionalization can immobilize molecules on the sidewall of nanotubes without destroying the geometric and electronic structures of the tubes. Small molecules can utilize hydrogen bonds,π-πbond,electrostatic force,the van der Waals force,hydrophobic and hydrophilic role,macromolecular polymer can utilize chain wind...