The melding of one-dimensional (1D) carbon nanotubes (CNTs) and two-dimensional (2D) graphene to generate a CNT-graphene hybrid with 3-dimensional (3D) features has generated a lot of scientific interest owing to the synergistic consequences of the resulting interface hybrid on the electrical, mechanical, electrochemical and optical properties, which presents plethora of opportunities in both fundamental research and device applications. The review presents an overview of the recent perspectives made in the field of CNT-graphene hybrid architectures. The possible applications particularly in device sensing, as well as challenges are also presented.

The outstanding properties of graphene arising from its monoatomic thickness, highly conjugated and twin-dimensionality merit attention for plethora of scientific and commercial applications. In this present review, the functionalization of surface chemistry of graphene is investigated to isolate its advantages over non-engineered materials for sensor research and related chemical and electrochemical sensing applications. The review also discuss new perspectives in the employment of these nano-engineered materials in chemical sensing and biosensing applications.

The transition from semi-metallic to semiconducting states in graphene has ushered in nanostructured materials with novel and enhanced electrical, mechanical, physiochemical and optical properties. The scope of graphene and its potential for novel applications could be substantially impacted by this transition. This article reviews the properties, recent synthesis methodologies and emerging applications of this wonder nanomaterial. The differentiations among the merits and challenges of current techniques are made, aiming to offer evidences to develop scalable and novel synthesis methodologies. The emphasis is on the synthesis, and the possible emerging promising applications arising from these conversion methods, and their overwhelming implications on our current knowledge of graphene and graphene nanostructures.