Preparation and Electrical Contact Properties of Palladium-doped Multi-walled Carbon Nanotubes†

doi:10.7503/cjcu20180506

Abstract

Abstract:

Multi-walled carbon nanotubes(MWCNTs) were oxidized by mixed acid, and immersed into the electroless deposition solution of palladium. After ultrasonicating, resting, and stirring respectively for 5 or 10 min, palladium-doped MWCNTs were prepared, and their morphology and structure were characte-rized. The results showed that the nanoparticles were uniformly distributed onto the MWCNTs with uniform and moderate particle size and doping amount after 5 min of stirring. At the same time, the composition of the doped nanoparticles was detected as zero-valent palladium and the doping type was p-type. In the electrical contact performance test, the contact resistance between the palladium-doped CNTs and the gold electrode was significantly improved, and the average value of the resistance decreased by nearly 71.09%.

Key words: Multi-walled carbon nanotubes, Doping, Electroless deposition, Palladium nanoparticles, Contact resistance

CLC Number:

TrendMD:

SUN Mengmeng,CHANG Chunrui,ZHANG Zhiming,AN Libao. Preparation and Electrical Contact Properties of Palladium-doped Multi-walled Carbon Nanotubes^†[J]. Chem. J. Chinese Universities, 2019, 40(1): 11.

Figures/Tables 8

Fig.1 SEM images of MWCNT(A) and MWCNT-T(B)

Scheme 1 Schematic diagram of doping CNT with Pd nanoparticles by electroless deposition method

Fig.2 SEM images of Pd-doped MWCNT samples prepared under different deposition conditions and deposition time(A) MWCNT-Pd-U-5; (B) MWCNT-Pd-U-10; (C) MWCNT-Pd-R-5; (D) MWCNT-Pd-R-10; (E), (G) MWCNT-Pd-S-5; (F), (H) MWCNT-Pd-S-10.

Fig.3 TEM(A, B) and HRTEM(C) images of MWCNT-Pd-S-5 at different magnification

Fig.4 XPS spectra of MWCNT(A), MWCNT-T(B) and MWCNT-Pd-S-5(C, D)

Fig.5 Raman spectra of MWCNT(a), MWCNT-T(b) and MWCNT-Pd-S-5(c)

Fig.6 Comparison of contact resistance between MWCNT and the gold electrodes before and after Pd doping

Fig.7 SEM images of assembling MWCNT-Pd-S-5 to the gold electrode pairs with different MWCNT number MWCNT number: (A), (B) 1; (C) 2; (D) 4; (E) 6; (F) 8.

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