Bio-sensing applications of graphene based composite films

Graphene is a two-dimensional (2D) material having honey-comb crystal lattice and thickness of one-atom. It has unique mechanical, electronic, chemical, optical, and thermal properties.1–5 Particularly its one atom thickness, high charge mobility and high surface-to-volume ratio make it eligible for very sensitive sensing applications.6–7 Applicability of GCFs for various applications is also limited by their fabrication process. Graphene based biological sensors fabricated through screen-printing electrochemical process has some pros and cons.8 In this review, we focus on the recent advances in bio-sensing application of Graphene based composite films. Bio sensors are discussed based on usage and sensing mechanism. The key difficulties and future points of view in this quickly emerging field going for GCFs for future sensing applications are given.