A Simple Approach to the Fabrication of Graphene-Carbon Nanotube Hybrid Films on Copper Substrate by Chemical Vapor Deposition

doi:10.1016/j.jmst.2014.11.027

Abstract

Abstract: In this study, graphene-carbon nanotube (CNT) hybrid films were directly synthesized on polycrystalline copper (Cu) substrates by thermal chemical vapor deposition (CVD) method. Graphene films were synthesized on Cu substrate at 1000 °C in mixture of gases: argon (Ar), hydrogen (H₂), and methane (CH₄). Then, carbon nanotubes (CNTs) were grown uniformly on the surface of graphene/Cu films at 750 °C in mixture of Ar, H₂, and acetylene (C₂H₂) gases. Ferric salt FeCl₃ solution deposited onto the surface of graphene/Cu substrate by spin coating method was used as precursor for the growth of the CNTs. The density and quality of the CNTs on the surface of graphene/Cu films can be controlled by varying the concentration of FeCl₃ salt catalyst.

Key words: Graphene, Carbon nanotube (CNT), Hybrid films, Copper substrate, Chemical vapor deposition (CVD)

Nguyen Van Chuc, Cao Thi Thanh, Nguyen Van Tu, Vuong T.Q. Phuong, Pham Viet Thang, Ngo Thi Thanh Tam. A Simple Approach to the Fabrication of Graphene-Carbon Nanotube Hybrid Films on Copper Substrate by Chemical Vapor Deposition[J]. J. Mater. Sci. Technol., 2015, 31(5): 479-483.

Figures/Tables 5

Photographs of Cu substrate before (a) and after (b) CVD process, typical SEM image (c) and EDX spectrum (d) of Cu substrate after CVD process.

(a) AFM image of graphene layer after transferring from the Cu substrate to SiO2 substrate, (b) HRTEM image of graphene layer after transferring from the Cu substrate to copper grid and (c) Raman spectrum of the graphene film grown on Cu substrate.

SEM images of CNTs grown onto the surface of: (a) Cu substrate, (b) graphene/Cu substrate. Insets in (a) and (b) are their corresponding TEM images.

SEM images of CNTs/graphene/Cu grown with various concentration of FeCl3 solution: (a) 0.001 mol/L, (b) 0.005 mol/L, (c) 0.01 mol/L and (d) 0.05 mol/L. Insets in (a-d) are their corresponding images at high magnifications.

(a) Raman spectrum and (b) TEM image of graphene-CNTs hybrid film grown with concentration of FeCl3 solution of 0.01 mol/L. Inset in (b) is its corresponding TEM image.

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