Graphene in combination with cucurbit[n]urils as electrode modifiers for electroanalytical biomolecules sensing

► Graphene plus cucurbit[n]uril materials have been prepared to develop electrochemical sensors. ► The materials combine the high electron mobility of graphene with the molecular recognition of CBs. ► Materials characterization by Ramman, elemental analysis, TEM and electrochemical techniques. ► Sensitive and selective analysis of tryptophan in two real samples has been performed.