Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Koichi Wakita"'
Autor:
Ajinkya G. Nene, Makoto Takahashi, Prakash R. Somani, Hare Ram Aryal, Koichi Wakita, Masayoshi Umeno
Publikováno v:
Carbon: Science and Technology, Vol 8, Iss 1, Pp 13-24 (2016)
Novel method to synthesize graphene-Fe3O4 nanocomposite is disclosed. Graphene functionalized with carboxylic group was added during the chemical synthesis of Fe3O4 nanoparticles by reduction of Fe(acac)3 using ascorbic acid to get graphene-Fe3O4 na
Externí odkaz:
https://doaj.org/article/30cade13aa01416789694615222818bc
Publikováno v:
In Solid State Electronics April 2010 54(4):447-451
Publikováno v:
Journal of Nano Research. 40:8-19
Magnetite (Fe3O4) nanoparticles were successfully synthesized by ascorbic acid mediated reduction of Fe (acac)3, without using any intentionally added capping agent. Fine tuning of synthesis parameters such as dropping rate of ascorbic acid solution,
Autor:
Yuuji Nomura, Rohit Khanna, Takuya Yoshida, Tomiharu Matsushita, Norihiro Nose, Hiroaki Takadama, Koichi Wakita, Yoshiyuki Oomori, Tadashi Kokubo
Publikováno v:
Materials Science and Engineering: C. 55:393-400
In many hip replacement surgeries, monolithic alumina is used as a femoral head due to its high wear resistance. However, it is liable to fracture under load bearing operations in artificial joints. We propose a promising way to overcome this limitat
Publikováno v:
Optical and Quantum Electronics. 47:203-210
The electric field effects on the shape of transmission spectra associated with exciton including continuum band transition in ultra-high-purity GaAs have been theoretically studied at room temperature. We have calculated the Stark red shift, linewid
Publikováno v:
Optics and Photonics Journal. :99-103
We have proposed a new model for the calculation of excitonic electroabsorption based on modified previously reported models for bulk structure. The excitonic absorption spectra in high purity GaAs have been theoretically studied in the presence of e
Autor:
Dilip Chandra Ghimire, Sachin M. Shinde, Subash Sharma, Koichi Wakita, Golap Kalita, Masaki Tanemura, Masayoshi Umeno, Muhammed Emre Ayhan
Publikováno v:
Corrosion Science. 78:183-187
An effective approach for preserving the metal surface from oxidation and corrosion is of a great importance for various practical and industrial applications. Here, we demonstrate that graphene coating by surface wave plasma (SWP) chemical vapor dep
Autor:
Muhammed Emre Ayhan, Subash Sharma, Golap Kalita, Koichi Wakita, Masaki Tanemura, Masayoshi Umeno
Publikováno v:
Journal of Materials Science. 48:7036-7041
Understanding of graphene nucleation and growth on a metal substrate in chemical vapor deposition (CVD) process is critical to obtain high-quality single crystal graphene. Here, we report synthesis of individual hexagonal graphene and their large clu
Autor:
Koichi Wakita, Masahiro Tahashi, Tatsunosuke Omi, Sadao Ohkido, Hiroyuki Ishikawa, Kengo Sawada, Makoto Takahashi
Publikováno v:
Journal of the American Ceramic Society. 96:1713-1717
The large bulk high-Tc YBa2Cu3O7−x (YBCO) superconductor samples were prepared by plastic-forming method. We examined the effects of the solvent and the crystallinity of YBCO powder on the composition, crystallinity, and superconducting properties
Publikováno v:
physica status solidi (RRL) - Rapid Research Letters. 7:340-343