<i>In situ</i> synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

Wang, Dongxing; Li, Da; Javid, Muhammad; Zhou, Yuanliang; Wang, Ziming; Lu, Sansan; Dong, Xiaoli; Zhang, Zhidong

doi:10.1039/c8ra00078f

Cited by 15 publications

(5 citation statements)

References 39 publications

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“…The graphite structure derived G‐bands appeared in the range of 1575 cm −1 to 1595 cm −1 , which occur due to the longitudinal and circumferential stretching of the nanotubes. The observed Raman spectra with the most prominent MWCNT peaks closely resemble the Raman spectra obtained from pristine MWCNT powder (D band peak at 1340 cm −1 and G band peak at 1590 cm −1 35 ). These observations established the fact that the high electric field (~10 kV) applied during the voltage‐controlled spray deposition did not affect the structural integrity or the chemical composition of the MWCNTs, nor induce any change in the vibrational nature of the nanotubes.…”

Section: Resultssupporting

confidence: 69%

Raman spectroscopic characterization of acid refluxed and surfactant‐assisted dispersed multiwalled carbon nanotubes on surface functionalized substrates

Maulik

Sarkar

Basu

et al. 2020

Micro & Optical Tech Letters

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This communication focuses on the Raman spectroscopic characterization of a voltage-controlled electrospray deposition (VCED) of multiwalled carbon nanotubes (MWCNTs) dispersed from acid refluxed and SDBS (sodium dodecyl benzene sulfonate) assisted carbon nanotube (CNT) dispersion techniques. This versatile method resulted in the direct deposition of CNT films on the surface functionalized target substrates, that is-APTES (3-aminopropyl-triethoxysilane) treated metal (aluminum foil), semiconducting (bare Si), and insulators (microscopy grade glass, silicon dioxide, and polymethyl methacrylate or PMMA)-used in this study. During the voltage-controlled deposition process itself, the spray area and thickness of the MWCNT films on a substrate can be easily manipulated. In this work, CNT thin films of 40-70 nm to 3-7 μm were produced as a function of deposition time, with excellent packing density and surface coverage. The precise thickness control of the CNT deposits on each target substrate was achieved by meticulously calibrating the mechanics of the voltagecontrolled spray system, for example, inter-electrode distance between the target surface and the nozzle, electric field, and flow rate of the CNT solution feed, in addition to the concentration of the CNT solution and the deposition time. These overall experimental results bode well for use of this technique in a wider range of applications where CNTs films with controlled thicknesses are required.

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Section: Resultssupporting

confidence: 69%

Raman spectroscopic characterization of acid refluxed and surfactant‐assisted dispersed multiwalled carbon nanotubes on surface functionalized substrates

Maulik

Sarkar

Basu

et al. 2020

Micro & Optical Tech Letters

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“…The details of the DC arc-discharge plasma method have been well described in our previous publications [19][20][21]. Briefly, Ag-Cu NPs and Ag-Sn NPs were prepared by evaporation of bulk targets under an atmospheric mixture of hydrogen (H 2 , 0.1×10 5 Pa) and argon (Ar, 0.1×10 5 Pa).…”

Section: Materials Preparation and Characterizationmentioning

confidence: 99%

Electrical/thermal behaviors of bimetallic (Ag–Cu, Ag–Sn) nanoparticles for printed electronics

et al. 2020

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In this work, Ag-Cu and Ag-Sn nanoparticles (NPs) were synthesized by a physical vapor condensation method, i.e. DC arc-discharge plasma. The as-prepared bimetallic nanoparticles consist of metallic cores of Ag-Cu or Ag-Sn and ultrathin oxide shells of CuO or a hybrid of SnO and SnO2. Ag-Sn NPs exhibit a room temperature resistivity of 4.24×10 -5 Ω•cm, a little lower than 7.10×10 -5 Ω•cm of Ag-Cu NPs. Both bimetallic nanoparticles demonstrate a typical metallic conduction behavior with a positive temperature coefficient of resistance (TCR) over 25-300 K. Ag-Sn NPs exhibit thermally competitive stability up to 230 °C and a lower resistivity of 3.18×10 -5 Ω•cm after sintering at 200 °C, making it potential for the flexible printed electronics.

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“…Synthesis: The details of the DC arc-discharge plasma method are well described in our previous publications. [39,40] Briefly, raw target was a bulk metal Sn (99.99% in purity), which served as the anode of arc discharge to be evaporated, whereas a tungsten rod was used as the opposite cathode. By evacuating the chamber to 10 À2 Pa, the hydrogen gas (0.01 MPa) and argon gas (0.02 MPa) were filled to the work chamber as the atmosphere of sample preparation.…”

Section: Methodsmentioning

confidence: 99%

Effects of Outer Shell Layer on the Electronic Transport Behaviors of Sn@SnO_x Nanoparticles

Ding

Wang

et al. 2020

Physica Status Solidi (b)

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Tin oxide-encapsulated tin nanoparticles (Sn@SnO x NCs) are in situ prepared by a modified DC arc-discharge plasma process. The as-prepared Sn@SnO x NCs are typically 50-70 nm in diameter with 6 nm of the SnO x shell. The diameter of Sn@SnO x NCs is 50-80 nm and the thickness of the SnO x shell increases to %25 nm after heat treatment in a vacuum tube furnace. The effect of SnO x shell thickness on the electrical properties of Sn@SnO x NCs is measured by the four-probe technique. The results show that the resistivity is described using Bloch-Grüneisen's equation with SnO x shell thickness-dependent resistivity and SnO x shell thickness-dependent Debye temperature above the superconducting transition temperature T c. Superconductivity occurs in both Sn@SnO x NCs with different shell thicknesses when the temperature is lower than T c. The T c of the two NCs (3.98 K, 4.15 K) is slightly higher than that of the metal block (3.73 K) due to the electron-scattering effect of the particles' surface shell. The resistances of the two samples below T c show an exponential decay mode, which is the result of the thermally activated phase slip (TAPS) and quantum phase slip (QPS).

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In situ synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

Cited by 15 publications

References 39 publications

Raman spectroscopic characterization of acid refluxed and surfactant‐assisted dispersed multiwalled carbon nanotubes on surface functionalized substrates

Raman spectroscopic characterization of acid refluxed and surfactant‐assisted dispersed multiwalled carbon nanotubes on surface functionalized substrates

Electrical/thermal behaviors of bimetallic (Ag–Cu, Ag–Sn) nanoparticles for printed electronics

Effects of Outer Shell Layer on the Electronic Transport Behaviors of Sn@SnO_x Nanoparticles

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In situ synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

Cited by 15 publications

References 39 publications

Raman spectroscopic characterization of acid refluxed and surfactant‐assisted dispersed multiwalled carbon nanotubes on surface functionalized substrates

Raman spectroscopic characterization of acid refluxed and surfactant‐assisted dispersed multiwalled carbon nanotubes on surface functionalized substrates

Electrical/thermal behaviors of bimetallic (Ag–Cu, Ag–Sn) nanoparticles for printed electronics

Effects of Outer Shell Layer on the Electronic Transport Behaviors of Sn@SnOx Nanoparticles

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Product

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Effects of Outer Shell Layer on the Electronic Transport Behaviors of Sn@SnO_x Nanoparticles