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●Outline Nanomaterials such as carbon nanotubes (CNTs) and graphene have attracted considerable attention due to their unique and practically useful physical properties, which completely differ from"bulk" materials. Our laboratory promotes research to create novel functionalities from nanomaterials by manipulating their structures and applying them to future nanoelectronics. Our fabrication processes, which utilize originally designed apparatuses such as multi-temperature zone CVD and solar furnace for ultrahigh temperature processes, are constructed by combining top-down and self-organized bottom-up approaches based on a fundamental understanding of atomic processes on surfaces. |
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● Controlled growth of CNTs from non-metallic solid nuclei Metal-free CNTs, which are desired for various applications such as electrochemical electrodes, are efficiently synthesized from nanodiamond (ND) particles by precise control of the growth driving force during CNT synthesis process. |
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Multilayer graphene nanoribbon (multi-GNR) and graphene with turbostratic stacking are fabricated by layer-by-layer process, intending to develop high-performance channel materials.
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● Large-scale production of highly crystalline graphene thin film from chemically exfoliated graphene oxides (GOs) Structural defects of GO formed during chemical fabrication processes are successfully restored by high temperature process under reactive environments with ethanol, resulting in expanded p conjugation area and improved physical properties. |
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● Selective and highly sensitive detection of biomaterials using nanocarbon-based thin film transistors CNTs and structure-restored GO using our process exhibit excellent electrical properties suitable for device applications such as biosensors. Very low concentration of protein (Immunoglobulin E, IgE) was selectively detected by our electrochemical devices. |
