A5079749826- Carbon Nanotubes in Composites
- Graphene research and applications
- Fullerene Chemistry and Applications
- Diamond and Carbon-based Materials Research
- Graphene and Nanomaterials Applications
- Nanopore and Nanochannel Transport Studies
- Boron and Carbon Nanomaterials Research
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Nanotechnology research and applications
- Nanoparticles: synthesis and applications
- Advanced Electron Microscopy Techniques and Applications
- Physics of Superconductivity and Magnetism
- Advanced Materials Characterization Techniques
- nanoparticles nucleation surface interactions
- Catalytic Processes in Materials Science
- Laser-Ablation Synthesis of Nanoparticles
- Force Microscopy Techniques and Applications
- Semiconductor materials and devices
- Molecular Junctions and Nanostructures
- Chemical and Physical Properties of Materials
- Porphyrin and Phthalocyanine Chemistry
- Mechanical and Optical Resonators
Meijo University
2012-2021
National Institute of Advanced Industrial Science and Technology
2011-2021
Graduate School USA
2016
NEC (Japan)
2006-2015
Ibaraki University
2015
Nagoya University
2001-2014
Photonics Electronics Technology Research Association
2012
University of Tsukuba
2002-2010
Japan Science and Technology Agency
2002-2010
Peking University
2007-2010
We demonstrate the efficient chemical vapor deposition synthesis of single-walled carbon nanotubes where activity and lifetime catalysts are enhanced by water. Water-stimulated catalytic results in massive growth superdense vertically aligned nanotube forests with heights up to 2.5 millimeters that can be easily separated from catalysts, providing material purity above 99.98%. Moreover, patterned, highly organized intrinsic structures were successfully fabricated. The water-assisted method...
We report high resolution electron microscope (HREM) observations and atomistic simulations of the bending single multi-walled carbon nanotubes under mechanical duress. Single multiple kinks are observed at angles. Their occurrence is quantitatively explained by simulations, which use a realistic many-body potential for atoms. show that fully reversible up to very large angles, despite highly strained tube regions. This due remarkable flexibility hexagonal network, resists bond breaking...
A freestanding single layer of hexagonal boron nitride ($h$-BN) has been successfully fabricated by controlled energetic electron irradiation through a layer-by-layer sputtering process. We have resolved atomic defects in $h$-BN with triangle shapes means an aberration corrected high-resolution transmission microscopy exit-wave reconstruction. Boron monovacancies are found to be preferably formed and the dominating zigzag-type edges proved nitrogen terminated.
Dynamic behavior of ultrafine particles gold around 20 A\r{} in size was examined at the level atomic resolution by an electron microscope equipped with a real-time video recording system. In real time, it observed that shape changed continually through internal transformation from single crystal to twinned crystal, and vice versa. The transformations were induced some extent irradiation beam. They took place abruptly less than 0.1 sec.
Stable and rigid carbon atomic chains were experimentally realized by removing atoms row from graphene through the controlled energetic electron irradiation inside a transmission microscope. The observed structural dynamics of such as formation, migration, breakage well explained density-functional theory calculations. method we reported here is promising to investigate all-carbon-based devices with conducting channel, which can be regarded ultimate basic component molecular devices.
Supercapacitor electrodes fabricated from single-walled carbon nanotubes (SWNTs) are shown to be capable of durable operation at 4 V, exceeding the operating voltage limit activated (AC, 3 V), while delivering significantly higher energy and power (see figure). Dual exploitation SWNTs as combined current collectors is also explored.
Edge structures of thermally treated graphite have been studied by means atomically resolved high-resolution TEM. The method for the determination a monolayer or more than one layer graphene sheets is established. A series tilting experiments proves that zigzag and armchair edges are mostly closed between adjacent layers, number dangling bonds therefore minimized. Surprisingly bilayer often exhibits AA stacking very hard to distinguish from single layer. Open edge with carbon can be found...
Extremely strong superstructure reflections have been observed for the first time by transmission electron microscopy (110) edge-on ${\mathrm{Ga}}_{0.5}$${\mathrm{In}}_{0.5}$P crystals lattice matched to GaAs. Growth was carried out metal-organic vapor-phase epitaxy. A monolayer superlattice (SL) of (Ga-rich plane) (In-rich plane)... is formed along [\ifmmode\bar\else\textasciimacron\fi{}111] and [1\ifmmode\bar\else\textasciimacron\fi{}11] directions. The substrates are found be playing a...
Multielement nanotubes comprising multiple phases, with diameters of a few tens nanometers and lengths up to 50 micrometers, were successfully synthesized by means reactive laser ablation. The experimentally determined structure consists beta-phase silicon carbide core, an amorphous oxide intermediate layer, graphitic outer shells made boron nitride carbon layers separated in the radial direction. resembles coaxial nanocable semiconductor-insulator-metal (or...
Electron microscope imaging for gadolinium metallofullerenes encapsulating in single-wall carbon nanotubes $[(\mathrm{Gd}@\mathrm{C}{}_{82}{)}_{n}@\mathrm{SWNTs}]$ identifies the single Gd atom encaged each. The intermolecular distance between $\mathrm{Gd}@\mathrm{C}{}_{82}$ is extremely regular, regarding chains of as novel one-dimensional crystals. Chemical state analysis atoms suggests evidence charge transfer from to either a fullerene cage or nanotube. slopes temperature dependence...
Evidence is presented, through high-resolution electron microscopy images, for the open-end growth of carbon nanotubes. Terminations incomplete layers carbon, seen on tube surfaces and cone tips, suggest that extension thickening tubes occur by island graphite basal planes existing surfaces. The nucleation positive (pentagons) negative (heptagons) disclinations open ends results in changes directions, producing different morphologies. A novel structure shows complete ``turn around growth,''...
We demonstrate that oxidized single-wall carbon nanohorns (SWNHs), a type of nanotube, entrap cisplatin, an anticancer agent. found the cisplatin structure was maintained inside SWNHs and slowly released from in aqueous environments. The effective terminating growth human lung-cancer cells, while themselves had no such effect. Cisplatin-incorporated are thus potential drug delivery system. Keywords: Carbon nanotube; nanohorn; drug; carrier;
A method based on a controlled solid-solid reaction was used to fabricate heterostructures between single-walled carbon nanotubes (SWCNTs) and nanorods or particles of silicon carbide transition metal carbides. Characterization by high-resolution transmission electron microscopy diffraction indicates that the have well-defined crystalline interfaces. The SWCNT/carbide interface, with nanometer-scale area defined cross section SWCNT bundle single nanotube, represents smallest heterojunction...