Fe-Filled Carbon Nanotubes:  Nano-electromagnetic Inductors

Watts, Paul; Hsu, Wen Kuang; Randall, David P.; Kotzeva, V. P.

doi:10.1021/cm021288p

Cited by 59 publications

(32 citation statements)

References 11 publications

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“…Because of their interesting dimensions and high surface areas, various inorganic nanoparticles, such as metals, metal oxides, and semiconducting nanoparticles, were coated on the surface of CNTs. Decoration of the surface of CNTs can get better the dispersity of CNTs in solvents [18] as well as promotion their optical, electric, and magnetic properties [7,19,25,26].…”

Section: Introductionmentioning

confidence: 99%

The decoration of multi-walled carbon nanotubes with nickel oxide nanoparticles using chemical method

et al. 2016

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In this paper, nickel oxide (NiO) nanoparticles have been fabricated using wet method and deposited on the surface of multi-walled carbon nanotube (MWCNT). To do so, functional groups were introduced on the surface of MWCNTs by treating with concentrated nitric acid. Nickel oxide nanoparticles were formed on the surface of functionalized MWCNTs by incipient wetness impregnation of nickel nitrate, and the resultant product was calcinated in air atmosphere. Characteristics of the NiO/ MWCNT were examined by various techniques, for example, Fourier transform spectroscopy (FTIR), X-ray diffraction analysis (XRD), transmission electron microscopy (TEM), thermogravimetric analyzer (TGA), and nitrogen adsorption-desorption isothermal as well as vibrating sample magnetometer (VSM). The FTIR spectra showed that carboxyl and hydroxyl functional groups existed on the surface of MWNTs after modification by concentrated nitric acid. The pattern of XRD indicated that MWNTs and nickel oxide nanoparticles coexisted in the NiO/MWCNT sample. The TEM images revealed that the NiO nanoparticles were distributed on the surface of the MWNTs, with the size ranging from 5 to 60 nm. Thermogravimetric analysis proved that NiO content decorated on MWCNTs was 80 and 15 wt%. The results of the Brunauer-Emmett-Teller (BET) data showed that the slight increment in the specific surface areas and porosities in the presence of the NiO nanoparticles on the surface of CNT.

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Section: Introductionmentioning

confidence: 99%

The decoration of multi-walled carbon nanotubes with nickel oxide nanoparticles using chemical method

et al. 2016

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“…A SWCNT network grown on plastic substrate shows capacitive behavior under a high alternating current (ac) frequency and is capable of storing an electrical charge. 13,14 In addition, the characteristic of the carbon nanotube film RF filter was simulated with a filter of conventional resistor and capacitor. In the simulated filter, a capacitor and a resistor are in parallel.…”

Section: Introductionmentioning

confidence: 99%

Capacitive tunnels in single-walled carbon nanotube networks on flexible substrate

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et al. 2012

Journal of Applied Physics

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Metal nanoantenna plasmon resonance lineshape modification by semiconductor surface native oxide J. Appl. Phys. 112, 044315 (2012) Nanostructured thin manganite films in megagauss magnetic field Appl. Phys. Lett. 101, 092407 (2012) Magnetic and dielectric properties of sol-gel derived nanoparticles of double perovskite Y2NiMnO6 J. Appl. Phys. 112, 044311 (2012) Universal mechanism for ion-induced nanostructure formation on III-V compound semiconductor surfaces Appl. Phys. Lett. 101, 082101 (2012) Additional information on J. Appl. Phys. We report the analysis of single-walled carbon nanotube networks, which are expected to be suitable as miniaturized flexible radio frequency RC filters and also have important implications for high frequency devices. The surface morphology obtained by atomic force microscopy shows that most of the growth on polypropylene carbonate substrate is homogeneous. The large value of peak intensity ratio of G and D band in Raman spectra indicates the high purity network. Nyquist plots of carbon nanotube networks on a flexible substrate are close to real circles, indicating that the material is conducting, and suggest a simple equivalent circuit having a resistor in parallel with a capacitor. The Bode plots give the dependence of real and imaginary impedances on frequency. While at high frequency, the impedance decreases, due to generation of capacitance between a single-walled carbon nanotube; at low frequency, it shows the normal behavior, having constant value. The tunnels among different carbon nanotubes are capable of storing electric charge. The accumulative capacitances of tunnels for three varied concentrations are calculated by electrochemical impedance spectroscopy simulations to fit the observed Nyquist plots.

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“…and ligand-based metallic compounds (ferrocene). CMNHs can be synthesised following four key pathways -(i) filling the inner cavities of CNTs and fullerenes with MNMs using vapour deposition, [67] arc discharge, [68] thermal annealing [69] and wet chemical approach [70] ; (ii) attaching MNMs onto CNT surfaces functionalised with pyrene, porphyrin derivatives [71] and similar linking molecules [72] ; (iii) decorating CNM surfaces with MNMs by solgel, [73] hydrothermal [74] and aerosol-based processes [75] and (iv) in-situ growth of MNMs on CNM surfaces by electrochemical, [76] eletroless deposition [77] and redox reactions. [78] Combinations of graphitic and metallic nanostructures result in the emergence of unique and synergistic electrical, optical, mechanical, catalytic, sensing ability and magnetic properties, which can be utilised for applications in various fields; e.g.…”

Section: Carbon-metal Nanohybrids (Cmnhs)mentioning

confidence: 99%

A critical review of nanohybrids: synthesis, applications and environmental implications

et al. 2014

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Environmental context. Recent developments in nanotechnology have focussed towards innovation and usage of multifunctional and superior hybrid nanomaterials. Possible exposure of these novel nanohybrids can lead to unpredicted environmental fate, transport, transformation and toxicity scenarios. Environmentally relevant emerging properties and potential environmental implications of these newer materials need to be systematically studied to prevent harmful effects towards the aquatic environment and ecology.Abstract. Nanomaterial synthesis and modification for applications have progressed to a great extent in the last decades. Manipulation of the physicochemical properties of a material at the nanoscale has been extensively performed to produce materials for novel applications. Controlling the size, shape, surface functionality, etc. has been key to successful implementation of nanomaterials in multidimensional usage for electronics, optics, biomedicine, drug delivery and green fuel technology. Recently, a focus has been on the conjugation of two or more nanomaterials to achieve increased multifunctionality as well as creating opportunities for next generation materials with enhanced performance. With incremental production and potential usage of such nanohybrids come the concerns about their ecological and environmental effects, which will be dictated by their not-yet-understood physicochemical properties. While environmental implication studies concerning the single materials are yet to give an integrated mechanistic understanding and predictability of their environmental fate and transport, the importance of studying the novel nanohybrids with their multidimensional and complex behaviour in environmental and biological exposure systems are immense. This article critically reviews the literature of nanohybrids and identifies potential environmental uncertainties of these emerging 'horizon materials'.

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Fe-Filled Carbon Nanotubes: Nano-electromagnetic Inductors

Abstract: Fe-filled carbon nanotubes exhibit an electromagnetic induction in ac excitation mode, which suggest the possible construction of electrical nanomotors.

Cited by 59 publications

References 11 publications

The decoration of multi-walled carbon nanotubes with nickel oxide nanoparticles using chemical method

The decoration of multi-walled carbon nanotubes with nickel oxide nanoparticles using chemical method

Capacitive tunnels in single-walled carbon nanotube networks on flexible substrate

A critical review of nanohybrids: synthesis, applications and environmental implications

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