Zobrazeno 241 - 250
of 622
pro vyhledávání: '"Yanwei Ma"'
Autor:
Xianping Zhang, Eiji Aoyagi, M. Namba, Gen Nishijima, Satoshi Awaji, Kazuo Watanabe, Shun Ito, Ryousuke Ishihara, Yanwei Ma
Publikováno v:
Journal of Alloys and Compounds. 527:188-192
Effects of Zr addition and magnetic field process on the superconducting property of HoBa 2 Cu 3 O 7− x films fabricated by a chemical vapor deposition technique in magnetic fields have been investigated. It is found that Zr additions lead to impro
Publikováno v:
Chinese Science Bulletin. 57:3045-3050
Graphene oxide (GO) film was electrochemically reduced by a cyclic voltammetry technique in 6 mol L−1 KOH aqueous solution. Electrochemically reduced graphene oxide (ER-GO) film was characterized by X-ray diffraction, X-ray photoelectron spectrosco
Autor:
Yanwei Ma, Baorong Ni, Yanpeng Qi, Zhaoshun Gao, Masaru Kiuchi, Lei Wang, Tsuyoshi Tamegai, Yasuyuki Nakajima, Teruo Matsushita, Dongliang Wang, Xianping Zhang, Edmund Soji Otabe
Publikováno v:
Progress in Superconductivity and Cryogenics. 14(2):1-7
``` Abstract-- In this review paper, we report the characteristics of the critical current density in FeAs based superconductors which is newly discovered by Hosono group of Tokyo Institute of Technology on 2008. Since the many specimens in prese
Autor:
Qian Dai, Qianqian Yang, Yanwei Ma, Qingrong Feng, Xiangdong Kong, Ruijuan Nie, Huai Zhang, Furen Wang, Li Han
Publikováno v:
Physica C: Superconductivity. 475:24-27
The experiment for preparing MgB 2 thin films by electron beam (e-beam) annealing of Mg–B multilayer is reported. The annealing process lasts less than 1 s, which effectively suppresses the volatility of Mg as well as the reaction of Mg and oxygen.
Publikováno v:
Electrochimica Acta. 69:364-370
A large-scale, environment-friendly method to produce water-soluble reduced graphene oxide by using glutathione as a reducing and stabilization agent has been developed. The results of UV–visible absorption spectroscopy, X-ray photoelectron spectro
Publikováno v:
Journal of Solid State Electrochemistry. 16:2597-2603
In this work, we have prepared activated carbon (AC)-based symmetric supercapacitor (SC) using Li2SO4 aqueous electrolyte instead of H2SO4 and KOH and obtained a device with an improved cell voltage window (CVW) of 0 − 1.6 V from 0 to 1.0 V. The SC
Publikováno v:
Materials Letters. 68:336-339
We reported a facile approach to synthesize nanocomposites with Mn 3 O 4 nanoparticles anchored to graphene nanosheets by one-step solvothermal process, which combined the growth of Mn 3 O 4 nanoparticles and the reduction of graphene oxide. It was f
Publikováno v:
Electrochimica Acta. 63:220-227
Nanostructured NiCo 2 O 4 spinel was fabricated with a facile, low-cost coprecipitation process. The ethylene glycol was applied to serve as a stabilizer to govern over the nucleation, growth, and agglomeration processes. The influence of the calcina
Publikováno v:
Journal of Alloys and Compounds. 511:251-256
Ruthenium oxide nanodots have been deposited on reduced graphene oxide (RGO) sheets homogeneously by hydrothermal and annealing methods. Adding NaOH solution in GO colloids prevents the restack and agglomeration of GO sheets when mixed with ruthenium
Autor:
Zhaoshun Gao, Chengduo Wang, Chao Yao, Chunlei Wang, Lei Wang, Yanpeng Qi, Yanwei Ma, Xianping Zhang, D.L. Wang
Publikováno v:
Physica C: Superconductivity and its Applications. 471:1124-1127
The doping effect of different carbon source on the properties of MgB 2 tapes was compared using three typical dopants, nano-C, C 60 , and C 9 H 11 NO. It is found that C 60 doped samples showed the highest carbon substitution ratio and resistivity,