Preparation and Characterization of Graphene/Carbon Nanotube Hybrid Thin Films by Drop-coating

doi:10.15541/jim20160299

Abstract

Abstract:

Hybrid thin films were prepared via a drop-coating method by using graphene prepared by chemical vapor deposition(CVD) and carbon nanotube dispersed in 1, 2-dichlorobenzene as crude materials. The structure and morphology of hybrid thin films were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that surface density of carbon nanotube in the hybrid thin films increased linearly with the increase of dispersion concentration. Furthermore, the transmittance and sheet resistance of the hybrid thin films, which were characterized by UV-visible spectroscope and four-point probe analyzer, respectively, both significant decreased when concentration of the dispersed carbon nanotube increased. The two parameters, to be specific, were found to be 92.18% (at 550 nm) and 0.998 kΩ/□, respectively as the concentration of the dispersed carbon nanotube reaching 0.1 mg/mL. In other words, the performances of the hybrid thin films can be improved by regulating concentration of carbon nanotube in the dispersion, showing the films potential applications in the fields of transparent electrodes, field effect transistors and laser mode-locking.

Key words: graphene, carbon nanotube, hybrid thin films, drop-coating

CLC Number:

TB332

HUANG Wei, ZHU Jia-Yi, LI Hao, YANG Xi, WANG Chao-Yang, FU Zhi-Bing. Preparation and Characterization of Graphene/Carbon Nanotube Hybrid Thin Films by Drop-coating[J]. Journal of Inorganic Materials, 2017, 32(2): 203-209.

Figures/Tables 7

Fig. 1 SEM images of the pristine copper foil (a) and nitric acid pre-cleaned copper foil (b) after annealing, high- (c) and low- (d) magnification SEM images of graphene/Cu

Fig. 2 (a) Photo of carbon nanotube dispersed in different dispersion system, (b) SEM image of dispersive carbon nanotube, and (c) schematic pictures of contact angle measurement of graphene films with different dispersion

Fig. 3 SEM images of hybrid thin films with different concentration of carbon nanotube (a-e), and curve of surface density of carbon nanotube vs concentration changes of dispersion (f) Carbon nanotube concentration (a-e): 0.02, 0.04, 0.06, 0.08, 0.1 mg/mL

Fig. 4 High-magnification TEM image (a) and electron diffraction pattern (b) of graphene, and low-magnification (c) and high-magnification (d) TEM images of hybrid thin films

Fig. 5 XPS spectrum of carbon nanotube/graphene/SiO2

Fig. 6 Raman spectra of graphene films (a,c) and graphene/carbon nanotube hybrid films (b,d)(a and b) RBM of graphene and graphene/ carbon nanotube hybrid films, respectively

Fig. 7 Image of hybrid film transferred on K9 glass (a), transmittance curve of hybrid thin films with different concentrations of carbon nanotube (b), and curve of transmittance and sheet resistance of hybrid films vs concentration changes of carbon nanotube (c)

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