Three different cyclodextrins (alpha, beta, and gamma CD) are used in a synthesis of free-standing cyclodextringraphite oxide-carbon nanotube (CD-GO-CNT) composite films and compared for the electrochemical supramolecular recognition. All composites show very good electrochemical response to three biomolecules (dopamine, ascorbic acid, and thioridazine), and the response of the electrical current is linearly proportional to the concentration of the biomolecules. The gamma CD-GO-CNT composite gives the best electrochemical supramolecular recognition performance among the other composites (alpha CD-GOCNT and beta CD-GO-CNT) because of the biggest cavity of gCD (0.95 nm of diameter) compared to alpha CD (0.57 nm of diameter) and beta CD (0.78 nm of diameter). The composite of bigger size CD is more sensitive, resulting that alpha CD-, beta CD-, and gamma CD-GO-CNT composites are in the order of the increasing sensitivity, to the response, and detail results will be discussed. (C) 2017 Elsevier Ltd. All rights reserved.