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2,090 results on '"Bando Y"'

1. Considerable Enhancement of Field Emission of SnO2Nanowires by Post-Annealing Process in Oxygen at High Temperature

Author

Fang XS, Tang CC, Bando Y, Wang JB, Li K, Zhong XL, and Zhou YC

Subjects
SnO2nanowires, Chemical vapor deposition, Field emission, Annealing, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Abstract The field emission properties of SnO2nanowires fabricated by chemical vapor deposition with metallic catalyst-assistance were investigated. For the as-fabricated SnO2nanowires, the turn-on and threshold field were 4.03 and 5.4 V/μm, respectively. Considerable enhancement of field emission of SnO2nanowires was obtained by a post-annealing process in oxygen at high temperature. When the SnO2nanowires were post-annealed at 1,000 °C in oxygen, the turn-on and threshold field were decreased to 3.77 and 4.4 V/μm, respectively, and the current density was increased to 6.58 from 0.3 mA/cm2at the same applied electric field of 5.0 V/μm.

Published
2009
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4. Comparative High Pressure Raman Study of Boron Nitride Nanotubes and Hexagonal Boron Nitride

Author

Saha, Surajit, Muthu, D. V. S., Golberg, D., Tang, C., Zhi, C., Bando, Y., and Sood, A. K.

Subjects
Condensed Matter - Materials Science, Condensed Matter - Other Condensed Matter
Abstract

High pressure Raman experiments on Boron Nitride multi-walled nanotubes show that the intensity of the vibrational mode at ~ 1367 cm-1 vanishes at ~ 12 GPa and it does not recover under decompression. In comparison, the high pressure Raman experiments on hexagonal Boron Nitride show a clear signature of a phase transition from hexagonal to wurtzite at ~ 13 GPa which is reversible on decompression. These results are contrasted with the pressure behavior of carbon nanotubes and graphite., Comment: 13 pages and 5 figures

Published
2006
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10. Achievement of 200,000 hours of operation at KEK 7-GeV electron 4-GeV positron injector linac

Author

Furukawa, K, primary, Akemoto, M, additional, Arakawa, D, additional, Arakida, Y, additional, Bando, Y, additional, Ego, H, additional, Enomoto, Y, additional, Higo, T, additional, Honma, H, additional, Iida, N, additional, Kakihara, K, additional, Kamitani, T, additional, Katagiri, H, additional, Kawamura, M, additional, Matsumoto, S, additional, Matsumoto, T, additional, Matsushita, H, additional, Mikawa, K, additional, Miura, T, additional, Miyahara, F, additional, Nakajima, H, additional, Natsui, T, additional, Ogawa, Y, additional, Ohsawa, S, additional, Okayasu, Y, additional, Oogoe, T, additional, Rehman, M A, additional, Satake, I, additional, Satoh, M, additional, Seimiya, Y, additional, Shidara, T, additional, Shirakawa, A, additional, Someya, H, additional, Suwada, T, additional, Tanaka, M, additional, Wang, D, additional, Yano, Y, additional, Yokoyama, K, additional, Yoshida, M, additional, Yoshimoto, T, additional, Zhang, R, additional, and Zhou, X, additional

Published
2023
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13. Effect of Clenching on Spinal Alignment in Normal Adults

Author

Takahashi M, Bando Y, Fukui T, Maruyama A, and Sugita M

Abstract

Purpose: Occlusion plays a role in the execution of physical abilities in various. The aim of this study was to clarify the effect of clenching on the spinal alignment.

Published
2022

25. Atomic-scale regulation of anionic and cationic migration in alkali metal batteries

Author

Xiong, P, Zhang, F, Zhang, X, Liu, Y, Wu, Y, Wang, S, Safaei, J, Sun, B, Ma, R, Liu, Z, Bando, Y, Sasaki, T, Wang, X, Zhu, J, Wang, G, Xiong, P, Zhang, F, Zhang, X, Liu, Y, Wu, Y, Wang, S, Safaei, J, Sun, B, Ma, R, Liu, Z, Bando, Y, Sasaki, T, Wang, X, Zhu, J, and Wang, G

Abstract

The regulation of anions and cations at the atomic scale is of great significance in membrane-based separation technologies. Ionic transport regulation techniques could also play a crucial role in developing high-performance alkali metal batteries such as alkali metal-sulfur and alkali metal-selenium batteries, which suffer from the non-uniform transport of alkali metal ions (e.g., Li+ or Na+) and detrimental shuttling effect of polysulfide/polyselenide anions. These drawbacks could cause unfavourable growth of alkali metal depositions at the metal electrode and irreversible consumption of cathode active materials, leading to capacity decay and short cycling life. Herein, we propose the use of a polypropylene separator coated with negatively charged Ti0.87O2 nanosheets with Ti atomic vacancies to tackle these issues. In particular, we demonstrate that the electrostatic interactions between the negatively charged Ti0.87O2 nanosheets and polysulfide/polyselenide anions reduce the shuttling effect. Moreover, the Ti0.87O2-coated separator regulates the migration of alkali ions ensuring a homogeneous ion flux and the Ti vacancies, acting as sub-nanometric pores, promote fast alkali-ion diffusion.

Published
2021

34. Strain engineering of two-dimensional multilayered heterostructures for beyond-lithium-based rechargeable batteries

Author

Xiong P, Zhang F, Zhang X, Wang S, Liu H, Sun B, Zhang J, Sun Y, Ma R, Bando Y, Zhou C, Liu Z, Sasaki T, and Wang G

Abstract

Beyond-lithium-ion batteries are promising candidates for high-energy-density, low-cost and large-scale energy storage applications. However, the main challenge lies in the development of suitable electrode materials. Here, we demonstrate a new type of zero-strain cathode for reversible intercalation of beyond-Li+ ions (Na+, K+, Zn2+, Al3+) through interface strain engineering of a 2D multilayered VOPO4-graphene heterostructure. In-situ characterization and theoretical calculations reveal a reversible intercalation mechanism of cations in the 2D multilayered heterostructure with a negligible volume change. When applied as cathodes in K+-ion batteries, we achieve a high specific capacity of 160 mA h g-1 and a large energy density of ~570 W h kg-1, presenting the best reported performance to date. Moreover, the as-prepared 2D multilayered heterostructure can also be extended as cathodes for high-performance Na+, Zn2+, and Al3+-ion batteries. This work heralds a promising strategy to utilize strain engineering of 2D materials for advanced energy storage applications.

Published
2020

37. Formation of Si nanocrystallites observed by in situ transmission electron microscopy and their effect on the enhancement of Er photoluminescence in Er-doped Si[O.sub.2]

Author

Bando, Y., Mitome, M., Fukata, N., Morihiro, H., Shirakawa, R., and Murakami, K.

Subjects
Silicon crystals -- Research, Silicon crystals -- Chemical properties, Erbium -- Research, Erbium -- Chemical properties, Electron microscopy -- Usage, Physics
Abstract

The formation of Si nanocrystallites (nc-Si) in erbium (Er)-dispersed Si[O.sub.x] films is examined by using in situ annealing and transmission electron microscopy measurements. The results have displayed that the formation of nano-Si region with the suitable size is vital for the enhancement of Er ion emission.

Published
2007

44. Excellent field emission properties of P-doped GaN nanowires

Author

B.D. Liu, Bando, Y., C.C. Tang, F.F. Xu, and Golberg, D.

Subjects
Gallium compounds -- Atomic properties, Nitrides -- Atomic properties, Phosphorus compounds -- Atomic properties, Semiconductor doping -- Methods, Chemicals, plastics and rubber industries
Abstract

The GaN nanowires, having average diameters of ~100 nanometer and lengths up to tens of micrometers and with P-doping were synthesized through a simple thermal evaporation process. The scanning electron microscope and high-resolution field-emission transmission electron microscope analyses revealed that P doping results in a rough surface morphology of GaN nonowires.

Published
2005

50. Structural characterization of (TBA, H)Ca(sub 2)Nb(sub 3)O(sub 10) nanosheets formed by delamination of a precursor-layered perovskite

Author

Xu, F.F., Ebina, Y., Bando, Y., and Sasaki, T.

Subjects
Molecular structure -- Analysis, Transmission electron microscopes -- Usage, Transmission electron microscopes -- Observations, Chemistry, Physical and theoretical -- Research, Chemicals, plastics and rubber industries
Abstract

Detailed transmission electron microscopy (TEM) investigations of the degree of delamination, crystallinity, microstructure, interface and surface structure, defects and chemical composition of nanosheets are reported. The effects of the present multiplex synthetic routine including ion exchange, intercalation and exfoliation processes are discussed.

Published
2003

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