In:
Ministry of Science and Technology, Vietnam, Ministry of Science and Technology, Vietnam (VMOST), Vol. 65, No. 3 ( 2023-3-15), p. 7-11
Abstract:
In this study, the thin films of graphene (Gr) doped with copper (I) chloride (CuCl) were fabricated on a copper (Cu) substrate by chemical vapour deposition method at 1000oC in a mixture of gases (Ar, H2, and CH4) combined with annealing method at 220oC to vapourise CuCl powder. The morphology, structure, electrical, and electrochemical characteristics of the CuCl-doped Gr films (CuCl-Gr) were investigated via field emission scanning electron microscopy (FESEM), Raman spectroscopy, four-probe method and cyclic voltammetry. The results of Raman spectroscopy showed that there is a shift of the characteristic peaks (D, G and 2D) toward higher frequencies of the CuCl-Gr film compared to the pristine Gr film. The surface resistance measurement results exhibited that the CuCl-Gr film has a surface resistance of about 452 ohm/square (Ω/□), 2.02 times lower than that of the Gr film (913 Ω/□). The electrochemical characteristic measurement results in 3 mM Fe(CN)63-/4- with 0.1 M PBS proved that the peak response current of the gold electrode (AuE) coated with CuCl-Gr film is 21.2 μA, 1.6 times higher than that of the AuE coated with Gr. These research results showed a great potential of using CuCl-Gr film to cover the surface of working electrodes in increasing the conductivity and sensitivity of electrochemical sensors.
Type of Medium:
Online Resource
ISSN:
1859-4794
DOI:
10.31276/VJST.vol(number).page
DOI:
10.31276/VJST.65(3).07-11
Language:
Unknown
Publisher:
Ministry of Science and Technology, Vietnam (VMOST)
Publication Date:
2023
SSG:
6,25
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