Tohoku University. Research Profiles

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"O" Keywords - 55 Result(s)

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 O

[Optical Filters]

Development of Miniature and Highly-Functional Photonic Devices Using Ultrafine Microstructures

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In our laboratory, miniature and highly-functional photonic devices based on new optical phenomena caused by the interaction of ultrafine microstructures with light have been studied. In addition, development of new production technology to overcome the problems that have been obvious from the practical application viewpoint of nanophotonic devices has been performed.

  • -Main research topics--
MEMS tunable metamaterials for optical control.
Structural color filters using subwavelength gratings for the applications of display and spectroscopic analyzers.
Surface-smoothing technology using surface self-diffusion.
Study of low loss silicon nanophotonic devices.

Targeted Application(s)/Industry

We aim to realize optical filters, optical resonators, and color filters, by using above technologies. Also, development of nano-photonic elements fabricated by a nanoimprint technology has been progressed.
We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.

Graduate School of Engineering
KANAMORI Yoshiaki, Professor Doctor of Engineering

[Optical MEMS]

Design and Fabrication of Micro-Optical Devices Based on Optics, Especially Optical MEMS and Sensors

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On the basis of optical engineering, optical technologies for sensing mechanical motion, spectroscopic properties, and other physical/chemical characteristics are investigated. Moreover, using semiconductor micro/nano-fabrication technology, integrated micro-optical sensors, micro/nano optical systems, optical micro-electro-mechanical systems (MEMS) are studied. Micro laser scanner for display, deformable mirror for telescope, optical displacement encoder, and fluorescent analysis system are the examples of research topics.

Targeted Application(s)/Industry

Optical design, Optical industries, Industries relating to semiconductor micro fabrication and MEMS, optical telecommunications, etc.

New Industry Creation Hatchery Center
HANE Kazuhiro, Professor Doctor of Engineering

[Optical sensor]

Design and Fabrication of Micro-Optical Devices Based on Optics, Especially Optical MEMS and Sensors

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On the basis of optical engineering, optical technologies for sensing mechanical motion, spectroscopic properties, and other physical/chemical characteristics are investigated. Moreover, using semiconductor micro/nano-fabrication technology, integrated micro-optical sensors, micro/nano optical systems, optical micro-electro-mechanical systems (MEMS) are studied. Micro laser scanner for display, deformable mirror for telescope, optical displacement encoder, and fluorescent analysis system are the examples of research topics.

Targeted Application(s)/Industry

Optical design, Optical industries, Industries relating to semiconductor micro fabrication and MEMS, optical telecommunications, etc.

New Industry Creation Hatchery Center
HANE Kazuhiro, Professor Doctor of Engineering

Development of Sensors and Measuring Systems for Ultra-Precision Manufacturing and Nanomanufacturing

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The research is being focused on measurement of surface forms of precision workpieces and stage motions of precision machines, which are important items for ultra-precision manufacturing and nanomanufacturing. Optical sensors are being developed for measurement of angle and displacement, which are fundamental quantities for manufacturing. Technologies for improvement of the sensor sensitivity and bandwidth, reduction of the sensor size as well as new multi-axis sensing methods are being The research is being focused on measurement of surface forms of precision workpieces and stage motions of precision machines. Optical sensors are being developed for measurement of angle and displacement. A number of scanning-type measuring systems for precision measurement of surface forms and stage motions are also being developed. Error separation algorithms and systems for straightness and roundness, which are the most fundamental geometries treated in ultra-precision manufacturing, are being investigated. Novel systems based on scanning probe microscopy are under development for micro- and nano-structures as well as freeform optics in responding to new and important challenges from ultra-precision manufacturing and nanomanufacturing.

Targeted Application(s)/Industry

The multi-axis optical displacement and angle sensors developed in the laboratory are expected to measure motions of semiconductor/IC manufacturing and inspection equipment, precision machine tools, ultra-precision measuring instrument. The surface profile measurement systems are expected t play an important role in ultra-precision manufacturing and nanomanufacturing industries.

Department of Nanomechanics, Graduate School of Engineering
GAO Wei, Professor PhD

[Optically Active Compounds]

Advanced Molecular Transformations by Organocatalysts

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The development of organic molecules which function as a catalyst has been extensively investigated to achieve selective and efficient transformation of organic molecules. Brønsted acids and bases are commonly employed as the catalyst in synthetic organic chemistry. To aim at their functionalization, axially chiral phosphoric acids and axially chiral guanidine bases have been developed as chiral Brønsted acid and base catalysts, respectively. A variety of optically active compounds has been synthesized through the development of highly stereoselective reactions using these catalysts.

Targeted Application(s)/Industry

The development of chiral Brønsted acid and base catalysts has been accomplished as recoverable and reusable organocatalysts and highly stereoselective molecular transformations have been established using these catalysts. The present methodology is applicable to process chemistry in preparing medicines and relevant compounds on the basis of the selective and efficient molecular transformations thus developed with reduction of the waste material.

Graduate School of Science
TERADA Masahiro, Professor PhD

[Optics]

Hands-On Access Fabrication Facility –Open Facility for MEMS and Semiconductor Prototyping–

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We offer a hands-on-access fabrication facility for MEMS and semiconductor research and development. The facility is located at the 1800m2 clean room, Jun-ichi Nishizawa Memorial Research Center, Tohoku University, and started in 2010. The principle is an open access that users can utilize the fab and operate the equipment by themselves. Users also can access a great deal of know-how accumulated at Tohoku University. More than 260 companies have utilized the fab for developing various devices. To accelerate University's R&D and education, product fabrication by a company user is started in July 2013.

Targeted Application(s)/Industry

Our target is MEMS and semiconductor devices including sensors (accelerometer, gyroscope, pressure sensor, force sensor, photo diode, radiation sensor, microphone, bio sensor), solar cell, RF device, optical device, micro actuator. Process technology, such as etching, sputtering, oxidation/diffusion, CVD and bonding is also available.

Micro System Integration Center
TOTSU Kentaro, Professor Doctor of Engineering

[Optimization Problem]

Optimizing everything / Optimal Society

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Aiming at developing practical quantum optimization technology known as quantum annealing, we are working on exploring basic technologies that can overcome the limitations and applications in collaboration with multiple companies. The advantage of the method is that it can be used simply by formulating a cost function that draws the goal to be optimized once, but we are not limited to the original method. We extend it by considering a much easier problem, sequential optimization by learning, black box optimization, etc.. In particular, it is being applied to automated driving, logistics in factories, and evacuation guidance during disasters.

Targeted Application(s)/Industry

Applications to route search problems such as automatic driving of various vehicles, evacuation route guidance at the time of disaster, process scheduling and a large number of combination problems. We can provide a solution to combinatorial optimization in each industry. (Transportation / distribution, manufacturing, materials, drug discovery, etc.)

Graduate School of Information Sciences, Applied Information Sciences, Information and Applied Technology, Physical Fluctuomatics
OHZEKI Masayuki, Associate Professor Doctor of Science

[Oral malodor]

Oral Biofilm Functional Analysis: from “What Are They?" to “What Are They Doing?"

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A large number of microorganisms inhabit the oral cavity, such as the teeth, gingiva and tongue, in the form of oral biofilm. The oral cavity forms an ecosystem where the host (humans) and parasites (microorganisms) coexist. Disruption of the balance of this oral ecosystem leads to dental caries, periodontal diseases and oral malodor, and even deterioration of dental materials.

Using leading-edge techniques of anaerobic experimental systems including original and unique devices, as well as the notion of "omics" such as metagenomics and metabolomics, we conduct research on oral biofilm functions. Knowledge of oral biofilms, from "what are they?" to "what are they doing?", enables us to address their control, that is, prevention of and therapy for oral biofilm-associated diseases.

Targeted Application(s)/Industry

Risk assessment of oral biofilm-associated diseases, such as dental caries, periodontal disease, oral malodor and aspiration pneumonia
Effects of medicine and food ingredients on oral biofilm function
Evaluation of biofilm-mediated material deterioration

Division of Oral Ecology and Biochemistry, Graduate School of Dentistry
TAKAHASHI Nobuhiro, Professor DDS, PhD

[Organic - inorganic Hybrid Materials]

Synthesis and material characterization of new organic ferroelectric materials, molecular semiconductors, molecular magnets.

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Multifunctional molecular-assemblies and hybrid organic - inorganic materials are examined from the viewpoint of structural freedom of organic molecules. The spin and electronic states of molecular-assemblies are designed in terms of electrical conductivity, magnetism, and ferroelectricity. Diverse molecular assemblies from single crystal, plastic crystal, liquid crystal, gel, to Langmuir-Blodgett film are our research targets, which were hybridized with inorganic gigantic clusters and metal nanoparticles. We are prepared to provide academic consultations to companies interested in our research.

Institute of Multidisciplinary Research for Advanced Materials
AKUTAGAWA Tomoyuki, Professor Doctor of Science

[Organic and polymer hybridized nanocrystals]

Hybridized Organic and Polymer Nanocrystals for Optically Functional Materials

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Organic-inorganic hybridized nano-material is one of the most important objectives in current material science, which would provide peculiar properties and unique function induced by optoelectronic interactions at the interface. Aiming at the development of novel nanostructure toward photonic devices, we have tried to fabricate well-defined core-shell type hybridized nanocrystals and their ordered array structure, and to evaluate linear and nonlinear optical properties.

Targeted Application(s)/Industry

Optical devices will contribute the development in the information and commutations, medical field etc. in near future. In addition, these employed fabrication techniques will be applied smoothly to polymer industry so as to enhance remarkably properties in polymer composites.

Institute of Multidisciplinary Research for Advanced Materials
OIKAWA Hidetoshi, Professor Doctor of Science

[Organic and polymer materials]

Hybridized Organic and Polymer Nanocrystals for Optically Functional Materials

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Features

Organic-inorganic hybridized nano-material is one of the most important objectives in current material science, which would provide peculiar properties and unique function induced by optoelectronic interactions at the interface. Aiming at the development of novel nanostructure toward photonic devices, we have tried to fabricate well-defined core-shell type hybridized nanocrystals and their ordered array structure, and to evaluate linear and nonlinear optical properties.

Targeted Application(s)/Industry

Optical devices will contribute the development in the information and commutations, medical field etc. in near future. In addition, these employed fabrication techniques will be applied smoothly to polymer industry so as to enhance remarkably properties in polymer composites.

Institute of Multidisciplinary Research for Advanced Materials
OIKAWA Hidetoshi, Professor Doctor of Science

[Organic Conductor]

Synthesis and material characterization of new organic ferroelectric materials, molecular semiconductors, molecular magnets.

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Features

Multifunctional molecular-assemblies and hybrid organic - inorganic materials are examined from the viewpoint of structural freedom of organic molecules. The spin and electronic states of molecular-assemblies are designed in terms of electrical conductivity, magnetism, and ferroelectricity. Diverse molecular assemblies from single crystal, plastic crystal, liquid crystal, gel, to Langmuir-Blodgett film are our research targets, which were hybridized with inorganic gigantic clusters and metal nanoparticles. We are prepared to provide academic consultations to companies interested in our research.

Institute of Multidisciplinary Research for Advanced Materials
AKUTAGAWA Tomoyuki, Professor Doctor of Science

[Organic Ferroelectrics]

Synthesis and material characterization of new organic ferroelectric materials, molecular semiconductors, molecular magnets.

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Features

Multifunctional molecular-assemblies and hybrid organic - inorganic materials are examined from the viewpoint of structural freedom of organic molecules. The spin and electronic states of molecular-assemblies are designed in terms of electrical conductivity, magnetism, and ferroelectricity. Diverse molecular assemblies from single crystal, plastic crystal, liquid crystal, gel, to Langmuir-Blodgett film are our research targets, which were hybridized with inorganic gigantic clusters and metal nanoparticles. We are prepared to provide academic consultations to companies interested in our research.

Institute of Multidisciplinary Research for Advanced Materials
AKUTAGAWA Tomoyuki, Professor Doctor of Science

 o

[oral mucosa]

Method for efficient production of induced pluripotent stem cells utilizing cells derived from oral mucosa

Features

We provide a technique which can produce induced pluripotent stem (iPS) cells with high establishment efficiency and imposes lower burden on patients. iPS cells can be produced efficiently with significantly increased establishment efficiency by selecting cells derived from the oral mucosa and introducing a reprogramming factor, which can induce the reprogramming of the cells into pluripotent stem cells, into the cells.

Targeted Application(s)/Industry

Graduate School of Dentistry Division of Molecular and Regenerative Prosthodontics
EGUSA Hiroshi, Professor D.D.S., Ph.D.

[organic materials]

Emergence in collective electrons in organic molecular materials

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The main research subjects in this group are the experimental investigations of the organic molecular conductors. The characteristic properties of the organic materials are multiple flexibilities owing to the assemble structure of nanometer-size molecules. This flexbility comes up recently for developing the organic electronic devices. We explore the fundamental electronic properties of the organic molecular materials which have wide range of the ground states from superconductivity to insulating states resulting from the strongly correlated electrons in the molecular pi-orbital. Such features are closely connected to flexible and multiple degrees of freedom in charge, spin, molecular latticeand molecules themselves. We are actively studying on the interesting and important issues in the condensed matter physics from the viewpoints of the characteristic flexbility of the organic molecular materials. We are prepared to provide academic consultations to companies interested in our research.

Low Temperature Condensed State Physics, Institute for Materials Research
SASAKI Takahiko, Professor Dr. Eng.

Spintronics Devices and Materials

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Spintronics is a technology utilizing electron spin which provided magnetic sensor, nonvolatile magnetic memory, and so on. Our studies are as below.

Noble & Rare-earth free magnetic films with large perpendicular magnetic anisotropy. We achieved to develop various Mn-bases alloy films exhibiting high perpendicular magnetic anisotropy (Fig.1 ).
THz range observation of magnetization motion. We achieved to detect a motion of magnetization using pulse laser in time domain (Fig. 2).
Novel organic spin devices. We achieved to fabricate hybrid junction consisting of an organic layer sandwiched by two inorganic magnetic layers and to observe magnetoresistance effect.
Tunnel Magnetoresistive devices: We are developing TMR devices with Mn-Ga alloys films (Fig.3 ).

Targeted Application(s)/Industry

Magnetic memory and storage. Microwave and Terahertz wave. Magnetic sensors.
We hope to conduct collaborative research with a willing company for a practical application of these devices and materials in industry.

WPI Advanced Institute for Materials Research
MIZUKAMI Shigemi, Professor Doctor of Engineering

[organic materials chemistry]

Fabrication of The Novel Designed Nanodrugs Composed of Poorly Water-Soluble Compounds

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One of our major research focuses is to design the novel drug nanoparticles, so called “Nano-prodrugs”, and to apply them as anticancer drugs or eye drops with excellent delivery efficiency. Nano-prodrugs are constructed by synthetic prodrugs molecules which contains poorly water-soluble substituent. They could be fabricated to nanoparticles with 100 nm or less in size by our reprecipitation technique, which has been used to create organic nanomaterials. We are aiming at practical application of our Nano-prodrugs in the near future.

Targeted Application(s)/Industry

Our reprecipitation technique for fabricating organic nanomaterials is a versatile technique that can be applied to various organic molecules as well as drug compounds. We hope to conduct collaborative research with a willing company on controlling and evaluating properties of the organic nanoparticles.

Institute of Multidisciplinary Research for Advanced Materials
KASAI Hitoshi, Professor Doctor of Science

[organic molecules]

Emergence in collective electrons in organic molecular materials

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Features

The main research subjects in this group are the experimental investigations of the organic molecular conductors. The characteristic properties of the organic materials are multiple flexibilities owing to the assemble structure of nanometer-size molecules. This flexbility comes up recently for developing the organic electronic devices. We explore the fundamental electronic properties of the organic molecular materials which have wide range of the ground states from superconductivity to insulating states resulting from the strongly correlated electrons in the molecular pi-orbital. Such features are closely connected to flexible and multiple degrees of freedom in charge, spin, molecular latticeand molecules themselves. We are actively studying on the interesting and important issues in the condensed matter physics from the viewpoints of the characteristic flexbility of the organic molecular materials. We are prepared to provide academic consultations to companies interested in our research.

Low Temperature Condensed State Physics, Institute for Materials Research
SASAKI Takahiko, Professor Dr. Eng.

[organic nanoparticles]

Fabrication of The Novel Designed Nanodrugs Composed of Poorly Water-Soluble Compounds

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Features

One of our major research focuses is to design the novel drug nanoparticles, so called “Nano-prodrugs”, and to apply them as anticancer drugs or eye drops with excellent delivery efficiency. Nano-prodrugs are constructed by synthetic prodrugs molecules which contains poorly water-soluble substituent. They could be fabricated to nanoparticles with 100 nm or less in size by our reprecipitation technique, which has been used to create organic nanomaterials. We are aiming at practical application of our Nano-prodrugs in the near future.

Targeted Application(s)/Industry

Our reprecipitation technique for fabricating organic nanomaterials is a versatile technique that can be applied to various organic molecules as well as drug compounds. We hope to conduct collaborative research with a willing company on controlling and evaluating properties of the organic nanoparticles.

Institute of Multidisciplinary Research for Advanced Materials
KASAI Hitoshi, Professor Doctor of Science

[organic scintillator]

High Sensitivity Radioactivity Measurement at Ultra-Low Radioactivity Environment

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Research Center for Neutrino Science established ultra-low radioactivity environment (trillion times lower than natural environment) with 1200 cubic-meter organic scintillator detector at 1000m underground where very stable temperature/humidity and low vibration are maintained. We are pursuing high sensitivity measurements, especially neutrino observation, and are also developing purification system for ultra-low radioactivity and high performance radioactivity detectors.

Targeted Application(s)/Industry

The established ultra-low radioactivity environment is suitable for rare phenomena study and is also applicable for high sensitivity radio-impurity measurement. It may also apply to investigation of biological influence of low radioactivity irradiation. The other applications such as neutrino detection technique for monitoring nuclear reactors and medical use of high sensitivity radioactivity detectors may also be considered.

Research Center for Neutrino Science
INOUE Kunio, Professor Doctor of Science