Research summary
Carbon nanotube and graphene synthesis and applications anchor the abstracts. Self-oriented monodispersed carbon-nanotube arrays were grown on patterned porous silicon and plain silicon substrates by CVD with catalyst-size control, demonstrating compatibility with silicon-device processing and providing well-ordered field-emission arrays [7]. Laser vaporization of carbon-nickel-cobalt mixtures at 1,200 degC produced single-wall nanotubes in greater than 70 percent yield that self-assembled into ropes of 100-500 SWNTs in a triangular lattice with 17 angstrom spacing and metallic resistivity below 10^-4 ohm-cm at 300 K [2]. Individual semiconducting SWNTs were used as room-temperature chemical sensors, showing large resistance changes upon exposure to NO2 or NH3 with faster and more sensitive response than existing solid-state sensors [1]. A chemical route was developed to produce sub-10 nm graphene nanoribbons (GNRs), including ribbons with varying widths or graphene junctions; all sub-10 nm GNRs were semiconducting and supported FETs with on/off ratios near 10^7 at room temperature [4]. Nano-graphene oxide (NGO) was synthesised and functionalised with PEG to give NGO-PEG conjugates stable in biological buffers and showing intrinsic visible/IR photoluminescence for cellular imaging [6]; NGO-PEG was also loaded noncovalently via pi-pi stacking with the camptothecin analogue SN38 for delivery of water-insoluble cancer drugs [5]. MoS2 nanoparticles grown on reduced graphene oxide sheets via a solvothermal route exposed abundant MoS2 edges on a conductive support, producing electrocatalysts for hydrogen evolution with a Tafel slope around 41 mV/decade superior to standalone MoS2 [3].
Recent publications
- Nanotube Molecular Wires as Chemical SensorsDOI
- Crystalline Ropes of Metallic Carbon NanotubesDOI
- Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reactionDOI
- MoS2 Nanoparticles Grown on Graphene: An Advanced Catalyst for the Hydrogen Evolution ReactionDOI
- Chemically Derived, Ultrasmooth Graphene Nanoribbon SemiconductorsDOI
- PEGylated Nanographene Oxide for Delivery of Water-Insoluble Cancer DrugsDOI
- Nano-graphene oxide for cellular imaging and drug deliveryDOI
- Ballistic carbon nanotube field-effect transistorsDOI
- Self-Oriented Regular Arrays of Carbon Nanotubes and Their Field Emission PropertiesDOI
- Individual single-wall carbon nanotubes as quantum wiresDOI
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External profiles
- ORCID: https://orcid.org/0000-0002-5541-0301
- OpenAlex: openalex.org
Profile compiled from public sources (Researchmap, OpenAlex, The University of Tokyo faculty directory). Last refreshed 2026-05. Report incorrect information.