Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Chikako Ogata"'
Autor:
Asami Funatsu, Kazuto Hatakeyama, Chikako Ogata, Md. Saidul Islam, Koinuma Michio, Tetsuya Kida, Yasumichi Matsumoto, Takaaki Taniguchi, Shinya Hayami
Publikováno v:
Journal of Materials Chemistry A. 3:20892-20895
We successfully developed an efficient proton/electron mixed conductor composed of a single phase material that functions at room temperature by introducing sulfate ions into graphene oxide interlayers. The promising properties of this material would
Autor:
Chikako Ogata1,2, Michio Koinuma1,2 koinuma@chem.kumamoto-u.ac.jp, Kazuto Hatakeyama1,2, Hikaru Tateishi1,2, Mohamad Zainul Asrori1,3, Takaaki Taniguchi1,2, Asami Funatsu1,2, Yasumichi Matsumoto1,2 yasumi@gpo.kumamoto-u.ac.jp
Publikováno v:
Scientific Reports. 1/17/2014, p1-6. 6p.
Autor:
Takaaki Taniguchi, Hikaru Tateishi, Hiroaki Ando, Chikako Ogata, Yasumichi Matsumoto, Masaki Nagamine, Kazuto Hatakeyama, Asami Funatsu, Masao Ichida, Hiroyuki Yokoi, Michio Koinuma
Publikováno v:
The Journal of Physical Chemistry C. 118:28258-28265
Optical and magnetic properties of graphene oxide (GO) have been intensively investigated because of the promising applications of GO-related materials in various technical fields. So far, the optical and magnetic properties of GO have been discussed
Autor:
Yasumichi Matsumoto, Ruriko Kurogi, Keisuke Awaya, Kazuto Hatakeyama, Michio Koinuma, Chikako Ogata, Takaaki Taniguchi
Publikováno v:
ACS applied materialsinterfaces. 9(31)
The rapid development of flexible and wearable electronics has led to an increase in the demand for flexible supercapacitors with enhanced electrochemical performance. Graphene oxide (GO) and reduced GO (rGO) exhibit several key properties required f
Autor:
Asami Funatsu, Takaaki Taniguchi, Hikaru Tateishi, Shinsuke Miyamoto, Chikako Ogata, Michio Koinuma, Yasumichi Matsumoto, Yuki Kamei, Kazuto Hatakeyama
Publikováno v:
Carbon. 76:40-45
Reduction largely affects the properties of graphene oxide (GO), because the content of each functional group changes by the oxidation degree. So far no study about re-oxidation and re-reduction of GO has been carried out. Herein, we report the effec
Autor:
Yuki Kamei, Michio Koinuma, Kengo Gezuhara, Yasumichi Matsumoto, Chikako Ogata, Takaaki Taniguchi, Hikaru Tateishi, Shinya Hayami, Kazuto Hatakeyama, Asami Funatsu
Publikováno v:
Journal of Electroanalytical Chemistry. 704:233-241
Low-cost graphene oxide (GO) and related materials are considered supermaterials because of their unique and excellent properties for many applications that are greatly affected by oxidation degree and dopants (impurities). Conventional GO prepared b
Autor:
Shinnsuke Miyamoto, Nobuhiro Matsushita, Chikako Ogata, Yasumichi Matsumoto, Shinya Hayami, Yuki Makinose, Asami Funatsu, Takaaki Taniguchi, Hikaru Tateishi, Michio Koinuma, Kazuto Hatakeyama
Publikováno v:
Particle & Particle Systems Characterization. 30:1063-1070
Graphene oxide (GO) is an attractive freestanding support that can be decorated with ultrathin organic layers for facile and low-cost fabrication of novel devices with controllable functional properties and microstructures. Here, it is reported that
Autor:
Shinya Hayami, Chikako Ogata, Jun Kuroda, Kazuto Hatakeyama, Asami Funatsu, Yasumichi Matsumoto, Takaaki Taniguchi, Hikaru Tateishi, Kengo Gezuhara, Michio Koinuma
Publikováno v:
Journal of The Electrochemical Society. 160:F1175-F1178
Graphene oxide (GO) exhibits relatively high proton conduction even at low relative humidity (RH) and temperatures. Thus, multi-layered GO film (GO paper) is a promising electrolyte in various cells and batteries. We report the in-plane and through-p
Autor:
Takaaki Taniguchi, Chikako Ogata, Yasumichi Matsumoto, Ruriko Kurogi, Kazuto Hatakeyama, Michio Koinuma
Publikováno v:
Chemical communications (Cambridge, England). 52(20)
We propose a new type of all-graphene oxide device. Reduced graphene oxide (rGO)/graphene oxide (GO)/rGO functions as both a supercapacitor and a battery, depending on the working voltage. The rGO/GO/rGO operates as a supercapacitor until 1.2 V. At g
Autor:
Michio Koinuma, Yutaka Kuwahara, Kazuto Hatakeyama, Seiji Kurihara, Yuki Kamei, Kengo Gezuhara, Masayo Sakata, Yusuke Watanabe, Takaaki Taniguchi, Yasumichi Matsumoto, Hikaru Tateishi, Asami Funatsu, Shinya Hayami, Chikako Ogata
Publikováno v:
The Journal of Physical Chemistry C. 116:19822-19827
Many unique properties of graphene oxide (GO) strongly depend on the oxygenated functional groups and morphologies. Here, the photoreaction process is demonstrated to be very useful to control these factors. We report the fast, simple production of n