Recent trends in preparation and application of carbon nanotube–graphene hybrid thin films

Abstract

The combination of one-dimensional (1D) carbon nanotubes (CNTs) and two-dimensional (2D) graphene materials to generate three-dimensional (3D) carbon nanotube-graphene hybrid thin films (CNGHTFs) has attracted great attention owing to their intriguing properties via the synergistic effects of these two materials on their electrical, optical, and electrochemical properties in comparison with their individual components. This review aims to provide a brief introduction of recent trends in preparation methodologies and some outstanding applications of CNGHTFs. It contains two main scientific subjects. The first of these is the research on preparation techniques of CNGHTFs, including reduction agent-assisted mechanical blending of reduced graphene oxide (rGO) and CNTs, hybridization methods for layer-by-layer (LBL) assembly of CNTs and rGO sheets, multi-step methods using combinations of a solution and chemical vapor deposition (CVD) processing, onestep growth of CNGHTFs by the CVD method, and modified CVD methods via thermal deposition of carbon source on catalyst surfaces. The advantages and disadvantages of the preparation methods of CNGHTFs are presented and discussed in detail. The second scientific subject of the review is the research on some outstanding applications of CNGHTFs in various research fields, including transparent conductors, electron field emitters, field-effect transistors, biosensors and supercapacitors. In most cases, the CNGHTFs showed superior performances than those of the pristine GO/graphene or CNT materials. Therefore, the CNGHTFs exhibit as high-potential materials for various practical applications. Opportunites and challenges in the fields are also presented.

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Carbon nanomaterials and their application to electrochemical sensors: a review

“…With the advent of nanotechnology came the capability to manipulate at the atomic level and synthesise uniquely organised molecular structures. In the last few decades, CNTs have been the focus of intense research because of their remarkable mechanical and electronic properties coupled with their chemical stability and heat conduction [25,[130][131][132]. Diamond (the hardest natural material) is an insulator and graphite is one of the softest conducting materials in nature.…”

Enhancement of electrical and thermal properties of graphene by aligned carbon nanotubes

“…Carbon nanotubes(CNTs) and graphene(GR) have received much attention due to their unique structure and outstanding properties such as superior electrical and thermal conductivities [1][2][3][4][5][6][7][8]. The synergistic effects of electrical and thermal properties have been pursued by combinations of One-dimensional CNTs and twodimensional graphene [9][10][11][12][13]. There are many potential applications in various fields based on these synergistic effects, such as GR/CNTs hybrid aerogels [14,15] and GR/CNTs hybrid materials for thermal management [16,17].…”