The unique structure of basal planes and edges in graphene endows graphene specific properties, such as the much higher heterogeneous electron transfer rate, capacitance, local density of states and structural defects, functional groups of edges than basal planes. These inherent features of graphene, which have a great role in promoting its electrochemical performance, are the embodiment of the edge effect. This paper introduces the influence of edge effect on the electrochemical performance of graphene, gives a review and prospect of graphene with different morphology characteristics, such as graphene nanoflakes, nanosheets, nanoplatelets, nanowalls, nanofibers, nanoribbons, and quantum dots, applying in the electrochemical biosensing field. Contents
1 Introduction
2 Edge effect of electrochemical performances: from graphite to graphene
2.1 Edge effect of electrochemical performances in graphite
2.2 Edge effect of electrochemical performances in graphene
3 Two- and quasi two-dimensional graphene-based electrochemical biosensors
4 One- and zero-dimensional graphene-based electr-ochemical biosensors
5 Conclusion and prospect