Superconductivity in entirely end-bonded multi-walled carbon nanotubes

Takesue, I.; Haruyama, J.; Murata, N.; Chiashi, Shohei; Maruyama, Shigeo; Sugai, Tomohiro; Shinohara, H

doi:10.1016/j.physc.2007.03.286

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…resistance transition ͉ specific heat ͉ superconductivity S uperconductivity in carbon nanotubes (CNTs) is a topic of intriguing interest (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). While the small-diameter nanotubes are predicted to have enhanced electron-phonon coupling (3)-a key element responsible for nanotube superconductivitythe associated increase in fluctuation effects is unfavorable to the manifestation of a superconducting transition.…”

Section: Superconducting Characteristics Of 4-å Carbon Nanotube-zeolimentioning

confidence: 99%

Superconducting characteristics of 4-Å carbon nanotube–zeolite composite

Lortz

Zhang²,

Shi³

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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Fig. 4. Opposing effects of TCDD and EGF on differentiation of NHEKs. (A)NHEKs were grown to confluence, and basal medium, or medium with ␣-naphthoflavone (NF, 1 M) was added 24 h before treatment. CEs were isolated after treatment with either 0.1% DMSO or TCDD (10 nM) for 5 days. (B) NHEKs were grown to confluence, and basal medium with or without EGF (10 ng/mL) was added 24 h before treatment. CEs were isolated after treatment with either 0.1% DMSO or TCDD (10 nM) for 5 days. (C) NHEKs were grown to confluence, and basal medium, or medium with EGF (10 ng/mL), was added 24 h before treatment. CEs were isolated after treatment with either 0.1% DMSO or TCDD (10 nM) in the presence or absence of PD153035 (300 nM) for 5 days. (A-C) The values for CEs are a mean of triplicate samples Ϯ SD. (D-G) NHEKs were grown to a cell density of either 50% or 100% confluence before basal medium, or medium with EGF (10 ng/mL), was added for 24 h before treatment. Total mRNA was isolated after treatment with either control vehicle (0.1% DMSO) or TCDD (10 nM) for 24 h. Real-time PCR was used to determine the relative expression of each indicated gene (y axis). Levels of mRNA [mean (n ϭ 3) Ϯ SD] are expressed in units relative to the minimum, given a value of 1. (A-G) The a indicates that the value from treatment with TCDD is significantly different from the DMSO control; the b indicates that the value from cotreatment with TCDD and NF is significantly different from TCDD alone; the c indicates that the value from cotreatment with TCDD and EGF is significantly different from with TCDD alone; the d indicates that the value from treatment with TCDD, EGF, and PD153035 is significantly different from treatment with TCDD and EGF; and the e indicates that treatment with EGF is significantly different from DMSO control treatment. For each of these comparisons, P Յ 0.01 by Student's t test. Comparisons made in D-G are within the group grown to a cell density of 100% confluence.

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Section: Superconducting Characteristics Of 4-å Carbon Nanotube-zeolimentioning

confidence: 99%

Superconducting characteristics of 4-Å carbon nanotube–zeolite composite

Lortz

Zhang²,

Shi³

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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“…This quantum confinement effect has emerged as a veritable challenge to the design of intrinsically metallic band structures. Bottom-up access to a family of robust metallic GNRs not only represents a critical component in the development of advanced nanographene-based logic circuits, e.g., as covalent interconnects capable of electronic and quantum transport, but could serve a versatile and highly tunable platform to explore emergent physical phenomena such as Luttinger liquids, − plasmonics, − charge density waves, − and superconductivity in 1D. − …”

Section: Introductionmentioning

confidence: 99%

Engineering Robust Metallic Zero-Mode States in Olympicene Graphene Nanoribbons

et al. 2023

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Metallic graphene nanoribbons (GNRs) represent a critical component in the toolbox of low-dimensional functional materials technology serving as 1D interconnects capable of both electronic and quantum information transport. The structural constraints imposed by on-surface bottom-up GNR synthesis protocols along with the limited control over orientation and sequence of asymmetric monomer building blocks during the radical step-growth polymerization have plagued the design and assembly of metallic GNRs. Here, we report the regioregular synthesis of GNRs hosting robust metallic states by embedding a symmetric zero-mode (ZM) superlattice along the backbone of a GNR. Tight-binding electronic structure models predict a strong nearest-neighbor electron hopping interaction between adjacent ZM states, resulting in a dispersive metallic band. First-principles density functional theory-local density approximation calculations confirm this prediction, and the robust, metallic ZM band of olympicene GNRs is experimentally corroborated by scanning tunneling spectroscopy.

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“…In particular, methods of hardening materials with single-walled carbon nanotubes (CNTs) are being actively developed [6,7]. The main reasons for choosing CNTs are their high strength characteristics, special electrical properties (the superconductivity property of nanotubes has been established [8]) as well as their capillary properties. Due to the creation and development of new methods for producing carbon nanotubes [9][10][11], the financial costs of producing them are reduced which means that this innovation will soon cover large aspects of the market.…”

Section: Introductionmentioning

confidence: 99%