Ni3S2 nanowires filled carbon nanotubes of ultra-high quality: Synthesis methods, structure, and electrical properties

Poudel, Yuba; Zhao, Xu; Jungjohann, Katherine L.; Thapa, Arun; Guo, Rui; Li, Wenzhi

doi:10.1016/j.diamond.2022.109156

Cited by 3 publications

(2 citation statements)

References 60 publications

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“…These nano‐hybrid materials possess the properties of both SWCNTs and guest materials, resulting in excellent electrical, magnetic, and optical properties. [ 13 ] SWCNT filling is also an excellent means to regulate the properties of carbon tubes, which has little destructiveness to SWCNTs and stable confined space. However, achieving continuous filling remains difficult, the interaction between filler and SWCNTs is less studied, and the mechanism is unclear.…”

Section: Introductionmentioning

confidence: 99%

CuI Encapsulated within Single‐Walled Carbon Nanotube Networks with High Current Carrying Capacity and Excellent Conductivity

Zhang

Wang

Zhang

et al. 2023

Adv Funct Materials

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High current carrying capacity and high conductivity are two important indicators for materials used in microscale electronics and inverters. However, it is challenging to obtain high conductivity and high current carrying capacity at the same time since high conductivity requires a weakly bonded system to provide free electrons, while high current carrying capacity requires a strongly bonded system. In this paper, CuI@SWCNT networks by filling the single‐walled carbon nanotubes (SWCNTs) with CuI is ingeniously prepared. CuI@SWCNT shows good stability due to the confinement protection of SWCNTs. Through the host‐guest hybridization, CuI@SWCNT networks exhibit a current carrying capacity of 2.04 × 107 A cm−2 and a conductivity of 31.67 kS m−1. Their current carrying capacity and conductivity are significantly improved compared with SWCNT. The Kelvin probe force microscopy measurements show a drop of surface potential energy after SWCNT filled with CuI, indicating that the CuI guest molecules regulate the position of the Fermi level of SWCNTs, increasing carrier concentration, achieving high conductivity and high current carrying capacity. This study offers ideas and solutions for the regulation of high‐performance carbon tube networks, which hold great promise for future applications in carbon‐based electronic devices.

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Section: Introductionmentioning

confidence: 99%

CuI Encapsulated within Single‐Walled Carbon Nanotube Networks with High Current Carrying Capacity and Excellent Conductivity

Zhang

Wang

Zhang

et al. 2023

Adv Funct Materials

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“…Hydrogen exists in the precursor solution for the synthesis of SWCNTs and is also used as a carrier gas during the synthesis process. A new peak appeared at 1046 cm −1 for the sulfuric-acid-treated sample, which represents the S=O stretching of sulfoxide [ 75 ] and is attributed to the sulfuric acid treatment. The peaks at 1073, 1106, 1153, 1244, and 1297 cm −1 , common in all three samples, are related to the C-O stretching mode of the primary alcohol, secondary alcohol, tertiary alcohol, and alkyl aryl ether functional groups [ 72 , 76 ].…”

Section: Resultsmentioning

confidence: 99%

Structural, Electrical, and Optical Properties of Single-Walled Carbon Nanotubes Synthesized through Floating Catalyst Chemical Vapor Deposition

Dolafi Rezaee,

Dahal,

Watt

et al. 2024

Nanomaterials

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Single-walled carbon nanotube (SWCNT) thin films were synthesized by using a floating catalyst chemical vapor deposition (FCCVD) method with a low flow rate (200 sccm) of mixed gases (Ar and H2). SWCNT thin films with different thicknesses can be prepared by controlling the collection time of the SWCNTs on membrane filters. Transmission electron microscopy (TEM) showed that the SWCNTs formed bundles and that they had an average diameter of 1.46 nm. The Raman spectra of the SWCNT films suggested that the synthesized SWCNTs were very well crystallized. Although the electrical properties of SWCNTs have been widely studied so far, the Hall effect of SWCNTs has not been fully studied to explore the electrical characteristics of SWCNT thin films. In this research, Hall effect measurements have been performed to investigate the important electrical characteristics of SWCNTs, such as their carrier mobility, carrier density, Hall coefficient, conductivity, and sheet resistance. The samples with transmittance between 95 and 43% showed a high carrier density of 1021–1023 cm−3. The SWCNTs were also treated using Brønsted acids (HCl, HNO3, H2SO4) to enhance their electrical properties. After the acid treatments, the samples maintained their p-type nature. The carrier mobility and conductivity increased, and the sheet resistance decreased for all treated samples. The highest mobility of 1.5 cm2/Vs was obtained with the sulfuric acid treatment at 80 °C, while the highest conductivity (30,720 S/m) and lowest sheet resistance (43 ohm/square) were achieved with the nitric acid treatment at room temperature. Different functional groups were identified in our synthesized SWCNTs before and after the acid treatments using Fourier-Transform Infrared Spectroscopy (FTIR).

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Nickel sulfide nanowire-filled carbon nanotubes as electrocatalysts for efficient hydrogen evolution reaction

Gotame,

Poudel,

Dahal

et al. 2024

International Journal of Hydrogen Energy

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Ni3S2 nanowires filled carbon nanotubes of ultra-high quality: Synthesis methods, structure, and electrical properties

Cited by 3 publications

References 60 publications

CuI Encapsulated within Single‐Walled Carbon Nanotube Networks with High Current Carrying Capacity and Excellent Conductivity

CuI Encapsulated within Single‐Walled Carbon Nanotube Networks with High Current Carrying Capacity and Excellent Conductivity

Structural, Electrical, and Optical Properties of Single-Walled Carbon Nanotubes Synthesized through Floating Catalyst Chemical Vapor Deposition

Nickel sulfide nanowire-filled carbon nanotubes as electrocatalysts for efficient hydrogen evolution reaction

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