A chemical solution approach for superconducting and hard epitaxial NbC film

Zou, Guifu; Luo, Hongmei; Zhang, Yingying; Xiong, Jie; Wei, Qiangmin; Zhuo, Mujin; Zhai, Junyi; Wang, Haiyan; Williams, D.; Li, Nan; Bauer, Elizabeth; Zhang, Xinghang; McCleskey, T. Mark; Li, Yanrong; Burrell, Anthony K.; Jia, Q. X.

doi:10.1039/c0cc01295e

Cited by 25 publications

(23 citation statements)

References 21 publications

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“…Our epitaxial NbC film has a resistivity of 60 µΩ.cm at 20 K (ref. 17). The resistivities for the CNT-NbC composite in this work are ~145 and ~110 µΩ cm normal and parallel to the CNT growth direction, respectively.…”

Section: Discussionmentioning

confidence: 84%

“…However, the process developed here is adaptable for the synthesis of other format of CNT-NbC composites. We have recently demonstrated that polymer-assisted deposition can be used to grow high-performance superconducting NbC films 17 . It is possible that one can use the process developed here to coat NbC on CNT ribbons, if one can successfully pull CNT ribbons and attach them on a substrate.…”

Section: Discussionmentioning

confidence: 99%

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Highly aligned carbon nanotube forests coated by superconducting NbC

et al. 2011

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The formation of carbon nanotube and superconductor composites makes it possible to produce new and/or improved functionalities that the individual material does not possess. Here we show that coating carbon nanotube forests with superconducting niobium carbide (nbC) does not destroy the microstructure of the nanotubes. nbC also shows much improved superconducting properties such as a higher irreversibility and upper critical field. An upper critical field value of ~5 T at 4.2 K is much greater than the 1.7 T reported in the literature for pure bulk nbC. Furthermore, the aligned carbon nanotubes induce anisotropy in the upper critical field, with a higher upper critical field occurring when the magnetic field is parallel to the carbon nanotube growth direction. These results suggest that highly oriented carbon nanotubes embedded in superconducting nbC matrix can function as defects and effectively enhance the superconducting properties of the nbC.

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Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Highly aligned carbon nanotube forests coated by superconducting NbC

et al. 2011

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“…In summary, the PAD technique is convenient and economical and is very promising for scaled‐up industrial applications. By applying this new technique, it is not only possible to prepare stable, reproducible metal‐oxide films, [2a,11b,31–32,34] but also other functional films, like epitaxial metal, [35] metal carbide, [36] and metal nitride films [3b,37] can all be produced easily. Two reviews of PAD are available; one on the synthesis of metal nitrides by PAD [3b] and the other on the use of PAD for the formation of a wide range of materials [38] .…”

Section: Polymer‐assisted Deposition (Pad)mentioning

confidence: 99%

Chemical Solution Deposition of Epitaxial Metal‐Oxide Nanocomposite Thin Films

Fei

Naeemi

Zou

et al. 2013

The Chemical Record

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Epitaixial metal-oxide nanocomposite films, which possess interesting multifunctionality, have found applications in a wide range of devices. However, such films are typically produced by using high-vacuum equipment, like pulse-laser deposition, molecular-beam epitaxy, and chemical vapor deposition. As an alternative approach, chemical solution methods are not only cost-effective but also offer several advantages, including large surface coating, good control over stoichiometry, and the possible use of dopants. Therefore, in this Personal Account, we review the chemistry behind several of the main solution-based approaches, that is, sol-gel techniques, metal-organic decomposition, chelation, polymer-assisted deposition, and hydrothermal methods, including the seminal works that have been reported so far, to demonstrate the advantages and disadvantages of these different routes.

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“…The unique solution preparation of PAD has greatly improved the stability of the solution. The majority of the functional materials have been prepared using the PAD technique, including oxides [16,[20][21][22][23][24][25][26], nitrides [27][28][29][30], carbides [31,32] and some metals such as Ge [33]. Specifically, deposition of the perovskite dielectric oxide thin films on both single crystal substrates and base metallic substrates has been demonstrated [23,34,35].…”

Section: Introductionmentioning

confidence: 99%

Polymer‐assisted deposition of perovskite dielectric oxide thin films

Lin

Gao

2018

IET Nanodielectrics

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Perovskite dielectric oxide thin films are tremendously important because of their promising applications in microelectronics and optic-electronic devices. Towards scalable applications of these materials, the development of wellcontrolled and cost-effective fabrication techniques is still under development. Here, recent progresses in the fabrication of perovskite dielectric oxide thin films by using a generic chemical solution deposition technique named polymer-assisted deposition (PAD) are reviewed. In this technique, metal ions are bonded to water-soluble polymers, forming stable and homogeneous precursor solutions of metallic ions surrounded by polymers which prevent hydrolysis of metal ions. Fabrication of the perovskite dielectric oxide thin films using the PAD technique, both on single crystal substrates and base metallic substrates, has been realised with good controllability. The qualities of the films are comparable with those of the ones prepared by physical-vapour deposition techniques.

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A chemical solution approach for superconducting and hard epitaxial NbC film

Abstract: Epitaxial NbC thin films were grown by a chemical solution technique, polymer assisted deposition. High quality epitaxial NbC film showed a transition temperature of 10 K and a hardness of 19.54 GPa.

Cited by 25 publications

References 21 publications

Highly aligned carbon nanotube forests coated by superconducting NbC

Highly aligned carbon nanotube forests coated by superconducting NbC

Chemical Solution Deposition of Epitaxial Metal‐Oxide Nanocomposite Thin Films

Polymer‐assisted deposition of perovskite dielectric oxide thin films

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