A5065857763- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Plasmonic and Surface Plasmon Research
- Semiconductor materials and devices
- Molecular Junctions and Nanostructures
- Spectroscopy and Quantum Chemical Studies
- Force Microscopy Techniques and Applications
- Supramolecular Self-Assembly in Materials
- Surface Chemistry and Catalysis
- Advanced biosensing and bioanalysis techniques
- Organic Light-Emitting Diodes Research
- Quantum Dots Synthesis And Properties
- Semiconductor materials and interfaces
- Luminescence and Fluorescent Materials
- Liquid Crystal Research Advancements
- Photonic and Optical Devices
- Nanowire Synthesis and Applications
- Organic Electronics and Photovoltaics
- Electrohydrodynamics and Fluid Dynamics
- Silicon Carbide Semiconductor Technologies
- Thin-Film Transistor Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Photochemistry and Electron Transfer Studies
Kanazawa University
2025
Hokkaido University
1996-2024
Toyota Motor Corporation (Switzerland)
1988-2024
Nagoya University
2024
Toyota Central Research and Development Laboratories (Japan)
2011-2023
Nara Institute of Science and Technology
2005-2022
Sapporo Science Center
2020
National Yang Ming Chiao Tung University
2009-2013
National Institute of Technology, Toyota College
2012
KU Leuven
2003-2007
A series of fluorophores with single-exponential fluorescence decays in liquid solution at 20 °C were measured independently by nine laboratories using single-photon timing and multifrequency phase modulation fluorometry instruments lasers as excitation source. The dyes that can serve lifetime standards for time-domain frequency-domain measurements are all commercially available, photostable under the conditions measurements, soluble solvents spectroscopic quality (methanol, cyclohexane,...
The enhanced transmission through periodic arrays of sub-wavelength holes in optically-thick metallic films has many potential applications, such as wavelength filters, light extraction from emission diodes, and subwavelength photolithography. A color filter comprising an aluminum film been fabricated. In addition to the simplicity process, enables excitation visible-range surface plasmons due its high plasma frequency. Periodic nanostructures open way for new visible filters.
Hierarchical self-assembly: Oligo(p-phenylenevinylene)s with pendant diamino triazine moieties can self-assemble through hydrogen-bonding interactions to give hexameric rosettes (see picture, left). These further organize into large supramolecular tubules (right) perfect space filling. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z52790_s.pdf or from author. Please note: The publisher not responsible content functionality...
CdS quantum dots prepared in ferritin, an α-helix-rich rhombic dodecahedral protein, showed left-handed cicularly polarized luminescence (CPL) from both direct transition and surface-trapping sites with relatively large anisotropy factors. Utilizing laser photoetching, the PL/CPL bands blue-shifted decreased QD size, but band disappeared. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, not copy-edited or typeset....
Dynamic control of electromagnetic heat transfer without changing mechanical configuration opens possibilities in intelligent thermal management nanoscale systems. We confirmed by experiment that the radiative is dynamically modulated beyond blackbody limit. The near-field exchange mediated phonon-polariton controlled metal-insulator transition tungsten-doped vanadium dioxide. functionalized flux transferred over an area 1.6 cm2 across a 370 nm gap, which maintained microfabricated spacers...
Plastic crystals represent a unique compound class that is often encountered in molecules with globular structures. The highly symmetric cubic crystal structure of plastic endows these materials multiaxial ferroelectricity allows three-dimensional realignment the polarization axes crystals, which cannot be achieved using conventional molecular ferroelectric low symmetry. In this work, we focused our attention on malleability as another characteristic feature crystals. We have synthesized new...
The light-induced and tip-induced polymerization of two diacetylene derivatives has been investigated at the air/solid interface by scanning tunneling microscopy (STM). One molecule is an isophthalic acid derivative with one group, while other one, a terephthalic derivative, contains functions. design molecules (symmetry, presence alkyl chains hydrogen bonding moieties) leads to formation highly ordered two-dimensional patterns where groups stack in optimal fashion. Both can be polymerized...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPerfluorinated Oligo(p-Phenylene)s: Efficient n-Type Semiconductors for Organic Light-Emitting DiodesSophie B. Heidenhain, Youichi Sakamoto, Toshiyasu Suzuki, Atsushi Miura, Hisayoshi Fujikawa, Tomohiko Mori, Shizuo Tokito, and Yasunori TagaView Author Information Institute Molecular Science Myodaiji, Okazaki 444-8585, Japan TOYOTA Central Research Development Laboratories Inc. Nagakute, Aichi 480-1192, Cite this: J. Am. Chem. Soc. 2000, 122,...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSynthesis, Characterization, and Electron-Transport Property of Perfluorinated Phenylene DendrimersYouichi Sakamoto, Toshiyasu Suzuki, Atsushi Miura, Hisayoshi Fujikawa, Shizuo Tokito, Yasunori TagaView Author Information Institute for Molecular Science, Myodaiji Okazaki 444-8585, Japan Toyota Central Research Development Laboratories Inc. Nagakute, Aichi 480-1192, Cite this: J. Am. Chem. Soc. 2000, 122, 8, 1832–1833Publication Date...
Near-field radiative heat transfer has been a subject of great interest due to the applicability thermal management and energy conversion. In this letter, submicron gap between pair diced fused quartz substrates is formed by using micromachined low-density pillars obtain both parallelism small parasitic conduction. The uniformity validated optical interferometry at four corners substrates. flux across measured in steady-state no greater than twice theoretically predicted flux, which...
By means of scanning tunneling microscopy, we have explored the two-dimensional self-assembly functional bicomponent hydrogen-bonding dye systems, leading to well-defined patterns, different from those individual components, and providing design rules immobilize multicomponent systems at liquid-solid interface.
The memory effect in floating nanodot gate field-effect-transistor (FET) was investigated by fabricating biomineralized inorganic embedded metal–oxide–semiconductor (MOS) devices. Artificially cobalt (Co) oxide cores accommodated ferritins were utilized as a charge storage node of memory. Two dimensional array Co core ferritin were, after selective protein elimination, buried into the stacked dielectric layers MOS capacitors and MOSFETs. Fabricated MOSFETs presented clear hysteresis...
We have developed a novel laser-induced crystallization method utilizing local heat-induced bubble/water interface. Continuous laser beam of 1064 nm is focused on gold nanoparticles thin film surface covered with glycine supersaturated aqueous solution. Light absorption the due to localized plasmon resonance caused heating at focal position and produced single thermal vapor microbubble, which generated gradient followed by convection flow around bubble eventually induced growth. The...
Abstract Crystalline phase transitions caused by external stimuli have been used to detect physical changes in the solid-state properties. This study presents mechanical switching of crystals ferrocene-containing rotaxane controlled focused laser light. The expansion and contraction can be driven turning on off light at 445 nm. irradiation-induced crystal involves elongation along a , b c axes 30 °C, whereas heating 105 °C causes shortening axis. expansions reversibly occur advantage rapid...
The 2D crystal lattice structure and bias-dependent contrast of a chiral electron donor-acceptor-donor triad system, composed two oligo(p-phenylene vinylene) donors perylenediimide acceptor (OPV4-PDI-OPV4), have been studied by means scanning tunneling microscopy (STM) at the liquid-graphite interface. OPV4-PDI-OPV4 is ordered in rows forms well-ordered structure. electrical properties donor parts are distinguished STM imaging.
Abstract Enantiomerically pure oligo( p ‐phenylene vinylene) diaminotriazine derivatives and a short structurally related achiral derivative, all having rigid backbone in common, are studied to self‐assemble at the solution–graphite interface by scanning tunneling microscopy. As function of length backbone, different two‐dimensional motifs formed (dimers rosettes) that rationalized terms balance between intermolecular interactions, this case, hydrogen bonding packing requirements alkyl...
We have demonstrated floating nanodot gate memory (FNGM) fabrication by utilizing uniform biomineralized cobalt oxide (Co3O4) nanodots (Co-BNDs) which are biochemically synthesized in the vacant cavity of supramolecular protein, ferritin. High-density Co-BND array (>6.5×1011cm−2) formed on Si substrate with 3-nm-thick tunnel SiO2 is embedded metal-oxide-semiconductor (MOS) stacked structure and used as FNGM. Fabricated MOS capacitors field effect transistors show hysteresis loop due...
A series of red and blue highly fluorescent core-substituted naphthalene bisimide dyes has been synthesized they have investigated as supramolecular building blocks. NMR UV-Vis titration experiments these with complementary melamines revealed the formation triple hydrogen bonds (DAD-ADA arrays) in solution. At stoichiometric ratios, ditopic melamine receptors could dissolve otherwise insoluble bisimides by means bonding, even aliphatic solvents. solution/graphite interface, one-dimensional...
Cadmium sulfide (CdS) nanoparticles (NPs) were synthesized in the cavity of recombinant Dps cage-shaped protein from Listeria innocua (rLiDps) modifying slow chemical reaction synthesis (SCRY) and two-step protocol (TSSP). The SCRY is realized by stabilizing cadmium ions as tetraamminecadmium employing thioacetic acid (which added final stage TSSP). optimized condition produced cubic CdS NPs rLiDps with an average diameter 4.2 nm small size dispersion. These showed photoluminescence. It was...
A metal-oxide-semiconductor (MOS) structure with a buried monolayer of ferritin cores in the SiO2 layer was fabricated and electron confinement confirmed. molecule adsorbed on thermal silicon oxide layer. After protein eliminated, ferrihydrite were dioxide We reduced to conductive iron metal nanodots by low-temperature annealing. X-ray photoelectron spectroscopy electron-energy-loss measurements confirmed reduction cores. The MOS capacitance showed hysteresis capacitance-voltage measurement,...
In Ferritin (einem α-Helix-reichen, rhombischen, dodekaedrischen Protein) hergestellte CdS-Quantenpunkte (CdS-QDs) zeigen linkshändige circular polarisierte Lumineszenz (CPL) aus einem direkten Übergang und Oberflächenstörstellen, die relativ große Anisotropiefaktoren aufweisen. Bei Laser-Photoätzen findet man mit abnehmender QD-Größe eine Blauverschiebung der PL/CPL-Banden von Bande des Übergangs verschwindet.
Hierarchische Selbstorganisation: Oligo(p-phenylenvinylene) mit Diaminotriazin-Endgruppen bilden durch Selbstorganisation wasserstoffverbrückte hexamere Rosetten (linke Bildhälfte), die sich wiederum zu langen supramolekularen Röhrchen idealer Raumausnutzung anordnen (rechts). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2004/z52790_s.pdf or from author. Please note: The publisher not responsible content functionality of any...
We demonstrated non-volatile flash memory fabrication by utilizing uniformly sized cobalt oxide (Co(3)O(4)) bionanodot (Co-BND) architecture assembled a cage-shaped supramolecular protein template. A fabricated high-density Co-BND array was buried in metal-oxide-semiconductor field-effect-transistor (MOSFET) structure to use as the charge storage node of floating nanodot gate memory. observed clockwise hysteresis drain current-gate voltage characteristics BND-embedded MOSFETs. Observed...