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16th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2012

作者： Tanaka, Yoko Biyani, Manish Akagi, Takanori Ichiki, Takanori Guraduate School of Engineering University of Tokyo Japan Core Research of Evolutional Science and Technology JST Japan

ISBN: (纸本)9780979806452

We describe the development of a simple and versatile approach for fabricating protein microarrays using a microintaglio printing method. Unlike conventional approaches that require multiple downstream reactions to synthesize proteins off-chip followed by printing using a robotic spotter, in our approach we can simultaneously synthesize and capture functional proteins in situ on chip without a spotter. We successfully demonstrated the concept validity by printing green fluorescent proteins (GFPs) on a glass surface, and our results for capture spot miniaturization (100-20 μm size scales) show that the sensitivity of the protein microarray signal becomes limited as the spot size decreases.

关键词： Proteins

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Introduction of an Ionic Liquid into the Micropores of a Metal–Organic Framework and Its Anomalous Phase Behavior†

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Angewandte Chemie 2014年第42期126卷

作者： Kazuyuki Fujie Teppei Yamada Ryuichi Ikeda Hiroshi Kitagawa Division of Chemistry Graduate School of Science Kyoto University Sakyo‐ku Kyoto 606‐8502 (Japan) R&D Center Kagoshima Kyocera Corporation Kirishima‐shi Kagoshima 899‐4312 (Japan) Present address: Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University Nishi‐ku Fukuoka 819‐0395 (Japan) Present address: International Research Center for Molecular Systems (IRCMS) Kyushu University Nishi‐ku Fukuoka 819‐0395 (Japan) Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Agency (JST) Chiyoda‐ku Tokyo 102‐0075 (Japan) Institute for Integrated Cell‐Material Sciences (iCeMS) Kyoto University Sakyo‐ku Kyoto 606‐8501 (Japan) INAMORI Frontier Research Center Kyushu University Nishi‐ku Fukuoka 819‐3095 (Japan)

Controlling the dynamics of ionic liquids (ILs) is a significant issue for widespread use. Metal–organic frameworks (MOFs) are ideal host materials for ILs because of their small micropores and tunable host–guest interactions. Herein, we demonstrate the first example of an IL incorporated within the micropores of a MOF. The system studied consisted of EMI‐TFSA (1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)amide) and ZIF‐8 (composed of Zn(MeIM) 2 ; H(MeIM)=2‐methylimidazole) as the IL and MOF, respectively. Construction of the EMI‐TFSA in ZIF‐8 was confirmed by X‐ray powder diffraction, nitrogen gas adsorption, and infrared absorption spectroscopy. Differential scanning calorimetry and solid‐state NMR measurements showed that the EMI‐TFSA inside the micropores demonstrated no freezing transition down to 123 K, whereas bulk EMI‐TFSA froze at 231 K. Such anomalous phase behavior originates from the nanosize effect of the MOF on the IL. This result provides a novel strategy for stabilizing the liquid phase of the ILs down to a lower temperature region.

关键词： Ionische Flüssigkeiten Metall‐organische Gerüstverbindungen Mikroporöse Materialien NMR‐Spektroskopie Phasenübergänge

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Titelbild: [NiFe]Hydrogenase fromCitrobactersp. S‐77 Surpasses Platinum as an Electrode for H2Oxidation Reaction (Angew. Chem. 34/2014)

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Angewandte Chemie 2014年第34期126卷

作者： Takahiro Matsumoto Shigenobu Eguchi Hidetaka Nakai Takashi Hibino Ki‐Seok Yoon Seiji Ogo International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University 744 Moto‐oka Nishi‐ku Fukuoka 819‐0395 (Japan) http://www.cstm.kyushu‐u.ac.jp/ogo/ Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University 744 Moto‐oka Nishi‐ku Fukuoka 819‐0395 (Japan) Graduate School of Environmental Studies Nagoya University Furo‐cho Chikusa‐ku Nagoya 464‐8601 (Japan) Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Agency (JST) Kawaguchi Center Building 4‐1‐8 Honcho Kawaguchi Saitama 332‐0012 (Japan)

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Back Cover: NbPt3Intermetallic Nanoparticles: Highly Stable and CO-Tolerant Electrocatalyst for Fuel Oxidation (ChemElectroChem 4/2014)

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ChemElectroChem 2014年第4期1卷 818-818页

作者： Dr. Gubbala V. Ramesh Dr. Rajesh Kodiyath Dr. Toyokazu Tanabe Maidhily Manikandan Prof. Takeshi Fujita Prof. Futoshi Matsumoto Dr. Shinsuke Ishihara Dr. Shigenori Ueda Dr. Yoshiyuki Yamashita Prof. Katsuhiko Ariga Prof. Hideki Abe National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 (Japan) Crystal Growth Centre Anna University Chennai Tamil Nadu 600-025 (India) World Premier International (WPI) Advanced Institute for Materials Research Tohoku University Sendai 980-8577 (Japan) Precursory Research for Embryonic Science and Technology (PRESTO) Japan Science and Technology Agency (JST) 4-1-8 Honcho Kawaguchi Saitama 332-0012 (Japan) Kanagawa University 3-27 Rokkakubashi Kanagawa-ku Yokohama Kanagawa 221-8686 (Japan) WPI International Center for Material Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 (Japan) Synchrotron X-ray Station at SPring-8 National Institute for Materials Science 1-1-1 Kouto Sayo Hyogo 679-5148 (Japan) Core Research for Evolutional Science and Technology (CREST) JST 4-1-8 Honcho Kawaguchi Saitama 332-0012 (Japan) TU-NIMS Joint Research Center Tianjin University 92 Road Nankai District Tianjin (PR China)

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[NiFe]Hydrogenase fromCitrobactersp. S‐77 Surpasses Platinum as an Electrode for H2Oxidation Reaction†

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Angewandte Chemie 2014年第34期126卷

Reported herein is an electrode for dihydrogen (H 2 ) oxidation, and it is based on [NiFe]Hydrogenase from Citrobacter sp. S‐77 ([NiFe] S77 ). It has a 637 times higher mass activity than Pt (calculated based on 1 mg of [NiFe] S77 or Pt) at 50 mV in a hydrogen half‐cell. The [NiFe] S77 electrode is also stable in air and, unlike Pt, can be recovered 100 % after poisoning by carbon monoxide. Following characterization of the [NiFe] S77 electrode, a fuel cell comprising a [NiFe] S77 anode and Pt cathode was constructed and shown to have a a higher power density than that achievable by Pt.

关键词： Anoden Brennstoffzellen Enzyme Nickel Wasserstoff

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Spot-selective DNA recovery from DNA microarray chips for on-chip directed evolution

Spot-selective DNA recovery from DNA microarray chips for on...

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16th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2012

作者： Ueno, Shingo Ono, Aiko Kobayashi, Ryo Tanaka, Yoko Sato, Shusuke Biyani, Manish Nemoto, Naoto Ichiki, Takanori Graduate School of Engineering University of Tokyo Japan Graduate School of Science and Engineering Saitama University Japan Core Research of Evolutional Science and Technology JST Japan

ISBN: (纸本)9780979806452

A novel class of DNA chips, on which immobilized DNA molecules are selectively recoverable, was developed for the directed evolution of biomolecules. DNA molecules immobilized on a gold surface via a DNA linker, which contains a nitrobenzyl group as a photocleavable moiety, were recovered from each chip by spot-selective photoirradiation, and the recovered DNA molecules were successfully amplified by PCR.

关键词： Biomolecules

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Single-molecule imaging device using localized evanescent illumination in polymeric nanoholes

Single-molecule imaging device using localized evanescent il...

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16th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2012

作者： Ono, Takao Iizuka, Ryo Akagi, Takanori Funatsu, Takashi Ichiki, Takanori School of Engineering University of Tokyo Japan Japan Society for the Promotion of Science Japan Core Research of Evolutional Science and Technology Japan Science and Technology Agency Japan School of Pharmaceutical Science University of Tokyo Japan

ISBN: (纸本)9780979806452

A single-molecule imaging device using polymeric nanoholes (PNH) was developed. It localizes an excitation volume at the bottom of its nanoholes for the reduction in background noise. Owing to this reduction, the number of types of enzymatic reactions visualized at single-molecule level in PNH was estimated to be approximately 2.5 times greater than that observed by total internal reflection fluorescence microscopy (TIRFM). On the basis of this estimate, PNH were designed and single protein molecule was imaged in PNH of 200 nm diameter and 200 nm depth.

关键词： Refractive index

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Redox‐Generated Mechanical Motion of a Supramolecular Polymeric Actuator Based on Host–Guest Interactions†

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Angewandte Chemie 2013年第22期125卷

作者： Masaki Nakahata Yoshinori Takashima Akihito Hashidzume Akira Harada Department of Macromolecular Science Graduate School of Science Osaka University Toyonaka Osaka 560‐0043 (Japan) Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Agency (JST)

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Estimation of the spin polarization for Heusler-compound thin films by means of nonlocal spin-valve measurements: Comparison of Co2FeSi and Fe3Si

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Physical Review B 2012年第10期85卷 100404(R)-100404(R)页

作者： K. Hamaya N. Hashimoto S. Oki S. Yamada M. Miyao T. Kimura Department of Electronics Kyushu University 744 Motooka Fukuoka 819-0395 Japan Precursory Research for Embryonic Science and Technology (PRESTO) Japan Science and Technology Agency Sanbancho Tokyo 102-0075 Japan Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Agency Sanbancho Tokyo 102-0075 Japan INAMORI Frontier Research Center Kyushu University 744 Motooka Fukuoka 819-0395 Japan

We study room-temperature generation and detection of pure spin currents using lateral spin-valve devices with electrodes formed from the Heusler compounds Co2FeSi (CFS) or Fe3Si (FS). The magnitude of the nonlocal spin-valve signals is strongly affected by resistivity variations observed particularly in low-temperature-grown Heusler compounds containing ordered structures. From an analysis based on a one-dimensional spin diffusion model, we find that the spin polarization monotonically increases with decreasing resistivity, which depends on the structural ordering, for both the CFS and FS electrodes, and show that CFS has a larger spin polarization than FS.

关键词： OPTICAL polarization THIN films HEUSLER alloys ELECTRODES ELECTRICAL resistivity COBALT compounds PARAMETER estimation

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Hierarchical TIO2 brush type nanostructures for efficient photoelectrochemical water splitting

Hierarchical TIO2 brush type nanostructures for efficient ph...

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16th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2012

作者： Pihosh, Yuriy Mawatari, Kazuma Turkevych, Ivan Le, Thu.H.H. Kajita, Yasuhito Chinen, Hiroyuki Tosa, Masahiro Kitamori, Takehiko Department of Applied Chemistry University of Tokyo Japan Core Research for Evolutional Science and Technology Japan Science and Technology Agency Japan Research Center of Photovoltaics National Institute of Advanced Industrial Science and Technology Japan Innovative Tribomaterials Group National Institute for Materials Science Japan

ISBN: (纸本)9780979806452

In this work, we developed a new type of nanostructured photoanode for a photoelectrochemical water splitting. The photoanode is based on hierarchical brush Titanium dioxide (TIO2) nanostructures (BTNs), which were fabricated by our recently reported Glancing Angle Deposition and Oxidation (GLADOX) technique. The maximum incident photon-to-current efficiency (IPCE) of the BTNs photoanode was around 22% in the UV region and around 5% in the VIS light. The integral IPCE of the BTNs measured under bias of 0.5V under UV light illumination was 30 times higher compared to the photoanode based on TIO 2 nanorods and about 200 times higher compared to the one based on TIO2 flat film. These results demonstrate that the brush TIO 2 nanostructures is a promising material for effective hydrogen generation via photocatalytic water splitting.

关键词： Fuel cells

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