Results 221 to 230 of about 2,278,860 (251)

Graphene unrolled from ‘cup-stacked’ carbon nanotubes

Carbon, 2012
Abstract High quality graphene with a large area and smooth edges has been obtained by unrolling the so-called ‘cup-stacked’ carbon nanotubes (CSCNTs) by the solution-phase oxidation and reduction. Atomic force microscopy and transmission electron microscopy observations reveal that the obtained graphene layers can even have a size of 20 μm in width ...
Qingfeng Liu, Tsuyohiko Fujigaya, Naotoshi Nakashima   +2 more
openaire   +1 more source

A reversible strain-induced electrical conductivity in cup-stacked carbon nanotubes

Nanoscale, 2013
We have used in situ current-voltage measurements of cup-stacked carbon nanotubes (CSCNTs) to establish reversible strain induced (compressive bending) semiconducting to metallic behavior. The corresponding electrical resistance decreases by two orders of magnitude during the process, and reaches values comparable to those of highly crystalline multi ...
Takuya, Hayashi, Thomas C, O'Connor, Katsuhisa, Higashiyama, Kohei, Nishi, Kazunori, Fujisawa, Hiroyuki, Muramatsu, Yoong Ahm, Kim, Bobby G, Sumpter, Vincent, Meunier, Mauricio, Terrones, Morinobu, Endo   +10 more
openaire   +2 more sources

Electrochemical properties of oxygenated cup-stacked carbon nanofiber-modified electrodes

Phys. Chem. Chem. Phys., 2014
The electrochemical reaction kinetics of Fe 2+/3+ and [Fe(CN) 6 ] 3−/4− is tunable by controlling the oxygen/carbon atomic ratio at the CSCNF surface.
Seongjae, Ko, Tetsu, Tatsuma, Akiyoshi, Sakoda, Yasuyuki, Sakai, Kikuo, Komori   +4 more
openaire   +2 more sources

Analysis of Stacking Structure of Cup-Stacked Type Carbon Nanofibers

MRS Proceedings, 2002
ABSTRACTThe lattice images of the new type (cup-stacked type) carbon nanofibers were observed by high resolution transmission electron microscopy (HRTEM) and the detailed structure was analyzed by image processing. The angle of opposed graphitic basal planes was measured from power spectrum obtained by 2 dimensional first Fourier transform.
Kyoich Oshida, Tatsuo Nakazawa, Kozo Osawa, Takuya Hayashi, Morinobu Endo, Takashi Yanagisawa, Mildred S. Dresselhaus   +6 more
openaire   +1 more source

Microstructural change of cup-stacked carbon nanofiber by post-treatment

Molecular Crystals and Liquid Crystals, 2002
Structural changes of truncated graphitic conical graphene layers (cups) stacked carbon nanofiber by post-treatment, such as oxidation and heat treatment, are described in terms of microstructure and morphology.
Yoong Ahm Kim, Takuya Hayashi, Yasuo Fukaiand, Morinobu Endo, Takashi Yanagisawa   +4 more
openaire   +1 more source

Structure and basic properties of cup-stacked type carbon nanofiber

Molecular Crystals and Liquid Crystals, 2002
Structural characterization of novel nanofibers, so called "cup-stacked type carbon nanofibers" with large hollow core and their potential applications are described as compared with those of tubular type of nanotubes and nanofibers. This novel carbon nanofiber containing peculiar features provide the variety of carbon nanotubes and nanofibers from ...
Takashi Yanagisawa, Takuya Hayashi, Yoong Ahm Kim, Yasuo Fukai, Morinobu Endo   +4 more
openaire   +1 more source

A simple route to short cup-stacked carbon nanotubes by sonication

Carbon, 2010
A simple but effective way of producing short cup-stacked carbon nanotubes with high quality is demonstrated using sonication in an ethanol/distilled water mixture. The substantial removal of amorphous carbon deposited on the truncated conical layer-stacked nanotubes by controlled air oxidation was a critical precondition to cut the nanotubes without ...
Daisuke Shimamoto, Kazunori Fujisawa, Hiroyuki Muramatsu, Takuya Hayashi, Yoong Ahm Kim, Takahashi Yanagisawa, Morinobu Endo, Mildred S. Dresselhaus   +7 more
openaire   +1 more source

Effect of ball milling on morphology of cup-stacked carbon nanotubes

Chemical Physics Letters, 2002
The effect of grinding on cup-stacked carbon nanotubes is studied. The application of a bending force on the sidewall of such carbon nanotubes, that is higher than the Van der Waals force acting between the cups, results in the shortening of carbon nanotubes and the formation of nano-barrels exhibiting an increased number of accessible active sites ...
Y.A. Kim, T. Hayashi, Y. Fukai, M. Endo, T. Yanagisawa, M.S. Dresselhaus   +5 more
openaire   +1 more source

An environmentally friendly dispersion method for cup-stacked carbon nanotubes in a water system

Chemical Communications, 2010
A dry process using VUV light was confirmed as a novel technique to attach functional groups onto cup-stacked carbon nanotubes and to develop their isolation in a water system without the use of dispersing agents.
Sun Hyung, Lee, Katsuya, Teshima, In Young, Jang, Kunio, Yubuta, Yong Jung, Kim, Yoong Ahm, Kim, Toetsu, Shishido, Morinobu, Endo, Shuji, Oishi   +8 more
openaire   +2 more sources

Damping Properties of Cups-Stacked Carbon Nanotubes (CSCNTs)/RTM6 Composites

Advanced Materials Research, 2012
Carbon nanotubes have better physical and mechanical behaviors than the traditional materials, in this study cups-stacked carbon nanotubes (CSCNTs) were filled into epoxy nancomposites to fabricate CSCNTs/epoxy nanocomposites. RTM6 was used by epoxy resin system. The cups-stacked carbon nanotubes (CSCNTs) were dispersed into the RTM6 matrix.
Yan Liu, Rui Feng Li, Hua Xin Peng, Andy Limmack, Zhi Wu Han   +4 more
openaire   +1 more source