Papers - DAIKO Yusuke

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  • Prevention of morphological change for (Ba,Sr)(Co,Fe)O3 cathodes by incorporating (Ce,Gd)O2 for intermediate-temperature solid oxide fuel cells Reviewed

    H. Sumi, K. Adachi, Y. Daiko

    Ceramics International   2024.07

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1016/j.ceramint.2024.07.317

  • Synthesis of highly dispersed metallic bismuth nanoparticles in CuO–Bi2O3–SiO2 glass-ceramics for sodium ion battery anode Reviewed

    M. Kuroiwa, F. Sato, T. Honma, Y. Daiko

    Journal of Solid State Chemistry   338   124838   2024.06

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    Other Link: https://doi.org/10.1016/j.jssc.2024.124838

  • Compositional design for SrTiO3 crystal precipitation from spinodal-type borosilicate glass containing large amounts of TiO2 Reviewed

    Kakeru Hattori, Masahiro Shimizu, Yusuke Daiko

    Journal of the Ceramic Society of Japan   131 ( 7 )   313 - 319   2023.07

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.2109/jcersj2.23010

    DOI: https://doi.org/10.2109/jcersj2.23010

    Other Link: https://www.jstage.jst.go.jp/article/jcersj2/131/7/131_23010/_article

  • Proton implantation into living cells under nonvacuum atmosphere Reviewed

    R. Okawa, Y. Daiko, A. Obata, T. Kasuga

    AIP Advances   13   015111   2023.01

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1063/5.0131816

  • Ionic conduction of glasses and their potential applications Invited Reviewed International journal

    Yusuke Daiko, Atsushi Sakuda, Tsuyoshi Honma, Akitoshi Hayashi

    Journal of the Ceramic Society of Japan   130 ( 8 )   552   2022.08

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:https://www.jstage.jst.go.jp/article/jcersj2/130/8/130_22035/_article/-char/ja  

    Materials with high ionic conductivity are attracting a great deal of attention because they are indispensable for improving the performance of batteries, sensors, and capacitors. Solid electrolytes, in particular, have a potential to compensate for the shortcomings of liquid electrolytes, and are the subject of intense research and development worldwide. One of the big characteristics of glass is its high formability. Here we are focusing on glass-electrolytes. Differences between “superionic conductive glasses” and “ordinary glasses”, as well as the mixed alkali effect will be overviewed. In addition, glasses can retain large residual stress inside that can reach the order of several GPa depending on the cooling conditions. These residual stresses also affect ionic conductivity. Recent results on the application of glass formability and softening fluidity to the formation of interfaces in all-solid-state batteries, and to ion emission from sharpened glasses are reviewed.

    DOI: https://doi.org/10.2109/jcersj2.22035

    DOI: https://doi.org/10.2109/jcersj2.22035

    Other Link: https://www.jstage.jst.go.jp/article/jcersj2/130/8/130_22035/_pdf/-char/ja

  • Hydrogen adsorption and electronic structural calculation of a polymer-derived SiCH membrane with a unique affinity for molecular hydrogen International journal

    Yusuke Daiko, Yuji Iwamoto

    Journal of Sol-Gel Science and Technology   2022.07

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    Authorship:Lead author, Corresponding author  

    In order to understand the hydrogen affinity of polymer-derived SiCH membranes, the amount of adsorbed hydrogen molecules was measured near room temperature, and the stabilization energy for hydrogen adsorption was also calculated by first-principles calculations using the MP2 method. The energies of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), the dipole moment of model molecules as well as the charge of the molecular hydrogen, and those relations to the hydrogen molecule affinity were investigated. A linear relationship was found between LUMO energy values and the minimum stabilization energy. It is suggested that a hydrocarbon ring (pore entrance) less than 1 nm on the surface of the SiCH membrane is important as an adsorption site of a hydrogen molecule.

    DOI: https://doi.org/10.1007/s10971-022-05876-z

    DOI: https://doi.org/10.1007/s10971-022-05876-z

    Other Link: https://link.springer.com/article/10.1007/s10971-022-05876-z

  • Determination of the activation volume for O2− ion conduction of YSZ via single-sweeping of load by utilizing an electrochemical indenter Reviewed International journal

    Yusuke Daiko, Junki Kato, Sawao Honda, Yuji Iwamoto

    Journal of the Ceramic Society of Japan   129 ( 10 )   616 - 618   2021.09

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    電導性を有する圧子を電極としても利用することで、圧子圧入と同時にインピーダンス測定を実施する電気化学圧子圧入法について研究しています。4GPaを超える局所高圧力場でのYSZの電気抵抗と応力・ひずみの関係を同時測定しました。有限要素法(COMSOL)による圧力場と電場のシミュレーションから、酸化物イオンが伝導する際の活性化体積を一回の圧入から決定することに成功しました。

    DOI: 10.2109/jcersj2.21128

    Other Link: https://www.jstage.jst.go.jp/article/jcersj2/129/10/129_21128/_article

  • Gas permeation and thermomechanical properties for macroporous alumina focused on necking size at grain boundaries Reviewed International coauthorship International journal

    S. Honda, P. Jia, Y. Daiko, S. Hashimoto, B. Nait-Ali, D. S. Smith, Y. Iwamoto

    International Journal of Applied Ceramic Technology   2021.08

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY  

    DOI: 10.1111/ijac.13860

  • Low temperature in situ formation of cobalt in silicon nitride toward functional nitride nanocomposites Reviewed International coauthorship

    S. Tada, M.D. Mallmann, H. Takagi, J. Iihama, N. Asakuma, T. Asaka, Y. Daiko, S. Honda, R.K. Nishihora, R.A.F. Machado, S. Bernard and Y. Iwamoto

    Chemical Communications   2021.01

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    DOI: 10.1039/d0cc07366k

    Other Link: https://pubs.rsc.org/en/content/articlelanding/2021/cc/d0cc07366k#!divAbstract

  • Hydrogen chemisorption properties of novel metal-free inorganic compound: exploring Lewis acid-base Al–N pair site formed in-situ within polymer-derived ceramics based on the silicon-aluminum-nitrogen-based system Reviewed International coauthorship

    S. Tada, N. Asakuma, S. Ando, T. Asaka, Y. Daiko, S. Honda, M. Haneda, S. Bernard, R. Riedel and Y. Iwamoto

    J. Mater. Chem. A   2020.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  • Superhydrophobic polycarbosilane membranes for purification of solar hydrogen Reviewed International coauthorship International journal

    Miwako Kubo, Kohei Okibayash, Misako Kojima, Ryota Mano, Yusuke Daiko, Sawao Honda, Samuel Bernard and Yuji Iwamoto

    Sep. Purif. Technol   258 ( 1 )   117998 - 117998   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1016/j.seppur.2020.117998

    Other Link: https://www.sciencedirect.com/science/article/pii/S1383586620324710?via%3Dihub

  • Kinetic Analysis of Crystallization of Zeolite Beta Synthesized by Direct Heating Reviewed International journal

    S. Honda, K. Nakashima, T. Yoshida, Y. Daiko, S. Hashimoto, Y. IwamotoO

    Journal of the American Ceramic Society   2020.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY  

    DOI: 10.1111/jace.17539

  • Hydrogen transport property of polymer-derived cobalt cation-doped amorphous silica Reviewed International coauthorship International journal

    Shotaro Tada, Shiori Ando, Toru Asaka, Yusuke Daiko, Sawao Honda, Samuel Bernard and Yuji Iwamoto

    Inorg. Chem. Front.   2020.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi. 10.1039/D0QI01035A

    Other Link: https://pubs.rsc.org/en/content/articlehtml/2020/qi/d0qi01035a

  • Fluoride ion field emission from a ZBLAC glass emitter Reviewed International journal

    Yusuke Daiko, Haruki Yanagida, Sawao Honda, Yuji Iwamoto

    Solid State Ionics   353   115400   2020.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    フッ化物イオン伝導性ガラスにIn2O3を添加したときのF-イオン伝導度向上について,残存酸素量やガラス転移温度,ラマンシフトなどから考察しています.また当該ガラスを先鋭化して高電圧を印加することで,F-イオン放出と思われる挙動を初めて確認しました.

    DOI: 10.1016/j.ssi.2020.115400

    Other Link: https://www.sciencedirect.com/science/article/pii/S0167273820304549?via%3Dihub

  • Hydrogen selective SiCH inorganic-organic hybrid/gamma-Al2O3 composite membranes Reviewed International coauthorship International journal

    Miwako Kubo, Ryota Mano, Misako Kojima, Kenichi Naniwa, Yusuke Daiko, Sawao Honda, Emanuel Ionescu, Samuel Bernard, Ralf Riedel and Yuji Iwamoto

    Membranes   10 ( 10 )   258 - 258   2020.09

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.3390/membranes10100258

    Other Link: https://www.mdpi.com/2077-0375/10/10/258

  • Dynamics of proton infiltration into binary MO・P2O5 (M=Ca, Sr) phosphate glasses Reviewed International journal

    Y. Daiko, S. Jeong, S.Honda, Y. Iwamoto

    Solid State Ionics   335   151 - 155   2019.03

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    溶融法で作製したガラスはプロトン(=OH基)濃度が低く、ガラスのプロトン伝導性は一般的に非常に低いです。以前に我々は燃料電池発電雰囲気に曝されることでガラスのプロトン伝導性が向上することを見出しています。燃料電池発電雰囲気を模擬した独自開発のin-situ赤外線分光装置を用いて、発電下でガラスのプロトン濃度が上昇するプロトン注入効果を初めて定量的に明らかにしました。論文では放射光X線による構造解析と合わせてプロトン注入を議論しています。

    DOI: 10.1016/j.ssi.2019.03.007

    Other Link: https://www.sciencedirect.com/science/article/pii/S0167273818307240

  • Palm-sized Ag+ ion emission gun operated at room temperature and non-vacuum atmosphere Reviewed International journal

    Y. Daiko, K. Segawa, K. Machida, H. Imataka, S. Honda, Y. Iwamoto

    Advanced Engineering Materials   20   1800198   2018.05

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-V C H VERLAG GMBH  

    室温付近でも高いAg+イオン伝導性を示すAgI-Ag2O-B2O3ガラスを先鋭化して電界印加することで、室温かつ大気圧雰囲気においてもAg+イオン放出を確認しました。Ag+イオン放出寿命を電気化学水晶振動子微量天秤による電流値と振動数変化から議論しています。またAg+イオン照射後のガラス基板にはより多数のHeLa細胞が付着することを明らかにしました。兵庫県立大学との共同研究成果です。

    DOI: 10.1002/adem.201800198

    Other Link: https://onlinelibrary.wiley.com/doi/full/10.1002/adem.201800198

  • Void formation/elimination and viscoelastic response of polyphenylsilsesquioxane monolith Reviewed International journal

    Y. Daiko, Y. Oda, S. Honda, Y. Iwamoto

    materials   11 ( 5 )   846   2018.05

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG, Basel, Switzerland  

    SiO2(シリカ)はSiが4つの酸素で囲まれていますが、4つのうち一つをフェニル基に置き換えたものがフェニルシルセスキオキサン(PSQ)と呼ばれます。このPSQ粒子はゾル-ゲル法によって合成でき、粒子をガラス転移温度以上で加熱プレスすることで透明なバルク体に転移し、また絶縁性も比較的高いです。粒子→バルク転移時の変形挙動をin-situ解析したところ、粒子間にボイドが存在する場合は粘弾性挙動を示すのに対して、ボイドフリーのものは弾性変形すること、またボイドフリーの方がより高い絶縁耐圧を示すことを実験的に明らかにしました。

    DOI: 10.3390/ma11050846

    Other Link: http://www.mdpi.com/1996-1944/11/5/846?type=check_update&version=1

  • Ag+ ion emission from a sharp Ag2O-Al2O3-P2O5-SiO2 glass-fiber emitter Reviewed International journal

    Y. Daiko, K. Segawa, S. Honda, Y. Iwamoto

    Solid State Ionics   322   5 - 10   2018.04

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    成形性に優れるAg+イオン伝導性ガラスを溶融法で作製して、その先端を先鋭化して真空条件で高電圧を印加することで、ガラス先端からのAg+イオン放出を確認しました。イオン電流と電圧の関係はショットキープロットでよい直線性が見られ、Ag+イオン放出は熱電子放出と同じショットキーモデルで表されることが明らかとなりました。

    DOI: 10.1016/j.ssi.2018.04.018

    Other Link: https://www.sciencedirect.com/science/article/pii/S0167273818301784

  • Microporosity and CO2 Capture Properties of Amorphous Silicon Oxynitride Derived from Novel Polyalkoxysilsesquiazanes Reviewed

    Y. Iwase, Y. Horie, Y. Daiko, S, Honda, Y. Iwamoto

    materials   11   422 - 422   2018.03

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    Language:English   Publishing type:Research paper (scientific journal)  

  • Synthesis of a novel polyethoxysilsesquiazane and thermal conversion into ternary silicon oxynitride ceramics with enhanced thermal stability Reviewed

    Y. Iwase, Y. Horie, Y. Daiko, S. Honda, Y. Iwamoto

    materials   11   139 - 139   2018.01

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    Language:English   Publishing type:Research paper (scientific journal)  

  • H+ emission under room temperature and non-vacuum atmosphere from a sol-gel-derived nanoporous emitter Reviewed International journal

    Y. Daiko, S. Mizutani, K. Machida, H. Imataka, S. Honda, Y. Iwamoto

    Journal of Sol-Gel Science and Technology   83 ( 2 )   252 - 258   2017.05

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer  

    ゾル-ゲル法を用いてプロトン伝導性多孔質ガラスロッドを作製し、その先端を先鋭化して高電界を印加することで、室温の大気圧においてH+がロッド先端から放出されることを実証しました。イオン注入はこれまで真空中で実施するのが常識であったが、本成果によって大気圧下でH+注入が可能となります。ポリアニリンに対する水素付加反応より、H+放出を実証しました。細胞工学との融合や新たな医療技術への応用が見込まれます。

    DOI: 10.1007/s10971-017-4430-z

    Other Link: https://link.springer.com/article/10.1007%2Fs10971-017-4430-z

  • Mechanochemically induced sulfur doping via oxygen vacancy formation Reviewed International coauthorship International journal

    Y. Daiko, J. Schmidt, G. Kawamura, S. Romeis, D. Segets, Y. Iwamoto, W. Peukert

    Physical Chemistry Chemical Physics   19   13838 - 13845   2017.05

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal society of Chemistry  

    酸化亜鉛に機械的衝撃を加えた際の表面酸素欠陥の生成量をラマン分光測定より詳細に調べ、欠陥生成のダイナミクスをFickの拡散理論を基に考察しました。インパクト頻度を加味した独自の拡散モデルによって、高い精度で自己拡散係数の決定に成功し、さらに酸素欠陥量とアニオン(S)ドープ量に線形関係を見出しました。HAADF STEM観察よりZnO(core)/ZnS(shell)構造形成を確認し、モデルの妥当性を実証しました。酸化物粒子の表面修飾法として広い応用が見込まれます。ドイツエルランゲン(FAU)および豊橋技術科学大学との共同研究成果です。

    DOI: 10.1039/C7CP01489A

  • Development of H+ emission gun using a proton conducting glass fiber Reviewed International journal

    Y. Daiko, S. Mizutani, K. Segawa, S. Honda, Y. Iwamoto

    Proc. IEEE 16th Int. Conf. Nanotech   351   2016.08

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE Xplore  

    当研究室ではプロトン伝導性ガラスについて研究しています。電子銃を参考に、プロトン輸率tH=1を示すリン酸塩ガラスをファイバー化、またナノ先鋭化してH+放出エミッタ―を作製しました。ガラスエミッタ―と引抜電極間に高電圧を印加すると、ファイバー先端からH+が放出されることを実証しました。H+銃の小型化につながるのではないかと考えています。

    DOI: 10.1109/NANO.2016.7751521

    Other Link: http://ieeexplore.ieee.org/document/7751521/?reload=true

  • Indentation-induced stress distribution and pressure effect on the resistivity of YSZ Reviewed International coauthorship International journal

    Y. Daiko, E. Takahashi, Y. Gueguen, H. Muto, A. Matsuda, T. Yazawa, T. Rouxel, Y. Iwamoto

    Solid State Ionics   286   96 - 101   2016.01

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    インデンターの圧子を電極として用いてインデンテーションと同時にインピーダンス測定を実施することで、4GPaを超える高圧力場でのYSZの電気抵抗と応力・ひずみの関係を同時測定しました。有限要素法(COMSOL)による圧力場と電場のシミュレーションから、酸化物イオンが伝導する際の活性化体積を決定しました。これまで活性化体積の評価にはアンビルセルなど高圧装置が必要で難度が高く、イオン伝導に対する活性化体積はほとんど評価されていません。本手法は試料をステージにおいて圧入するだけで非常に簡便・迅速であり、さらに従来とは異なり、力学応答(弾性率など)と電気抵抗の同時評価が可能という非常に大きな利点があります。燃料電池電解質の劣化加速試験など、本手法の適用範囲が広がっています。

    DOI: 10.1016/j.ssi.2015.12.026

    Other Link: http://www.sciencedirect.com/science/article/pii/S0167273815004762

  • Polymer-derived amorphous silica-based inorganic-organic hybrids having alkoxy groups: intermediates for synthesizing microporous amorphous silica materials Reviewed International journal

    M. N. M. Sokri, T. Onishi, Z. Mouline, Y. Daiko, S. Honda and Y. Iwamoto

    Journal of Ceramics Society Japan   123   732 - 736   2015.09

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    DOI: http://doi.org/10.2109/jcersj2.123.732

  • Synthesis and characterization of organoamine-functionalized amorphous silica materials for CO2-sensitive membranes Reviewed International coauthorship International journal

    Mouline Zineb, Asai Kota, Kawai Akira, Sekimoto Koichiro, Onishi Takahiro, Daiko Yusuke, Honda Sawao, Iwamoto Yuji

    J. Ceramic Society of Japan   123   732 - 738   2015.09

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  • Hydrophobicity of amorphous silica-based inorganic-organic hybrid materials derived from perhydropolysilazane chemically modified with alcohols Reviewed International journal

    M. N. M. Sokri, T. Onishi, Y. Daiko, S. Honda and Y. Iwamoto

    Microporous and Mesoporous Materials   215 ( 1 )   183 - 190   2015.05

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    DOI: 10.1016/j.micromeso.2015.05.039

  • Synthesis of microporous amorphous silica from perhydropolysilazane chemically modified with alcohol derivatives Reviewed

    M.N.M. Sokri, Y. Daiko, S. Honda, Y. Iwamoto

    Journal of Ceramic Society of Japan   123 ( 1436 )   292 - 297   2015.04

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2109/jcersj2.123.292

  • Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics Reviewed

    A. Mineshige, H. Mieda, M. Manabe, T. Funahashi, Y. Daiko, M. Nishi, K. Yamaji, T. Horita, K. Amezawa, K. Yashiro, T. Kawada, H. Yoshioka

    Solid State Ionics   262 ( 1 )   555 - 558   2014.09

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ssi.2014.04.009

  • Proton incorporation, mixed alkaline effect and H+/e- mixed conduction of phosphosilicate glasses and glass-ceramics Reviewed

    Y. Daiko, T. Yamada, A. Mineshige, T. Yazawa

    Electrochemistry   82 ( 10 )   901 - 905   2014.09

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    溶融法で作製したリンケイ酸塩ガラスのプロトン伝導性に関する論文です。水素雰囲気中での通電条件によりリンケイ酸塩ガラス中にプロトンが導入されること、プロトン輸率は混合アルカリ効果の影響を非常に受けること、またSnを添加したガラスはプロトンと電子の両方を伝導する混合伝導性を発現することを説明しています。

    DOI: 10.5796/electrochemistry.82.901

    Other Link: https://www.jstage.jst.go.jp/article/electrochemistry/82/10/82_14-E00038/_article

  • Proton conduction in nanopores of sol–gel-derived porous glasses and thin films Invited Reviewed

    Yusuke Daiko

    Journal of Sol-Gel Science and Technology   2014.02

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    ゾル-ゲル法を用いたプロトン伝導性ナノポーラス材料の作製方法と伝導メカニズムについて解説している。細孔半径が5ナノメートル程度より小さくなると、プロトン(水分子)の運動性が低下することを示し、その導電率との関係を明らかにした。

    DOI: 10.1007/s10971-014-3297-5

    Other Link: http://link.springer.com/article/10.1007/s10971-014-3297-5

  • High-pressure (GPa) impedance measurements based on an indentation- induced local stress field Reviewed

    Yusuke Daiko, Eri Takahashi, Norio Hakiri, Hiroyuki Muto, Atsunori Matsuda, Tanguy Rouxel, Jean-Christophe Sangleboeuf, Atsushi Mineshige, Tetsuo Yazawa

    Solid State Ionics   254   6 - 10   2014.01

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    圧子圧入法を利用したGPa級の局所応力場を利用した高圧下インピーダンス測定を行い、酸化ジルコニアのイオン伝導に伴う活性化体積を決定した。活性化体積はイオンがホッピングする際の構造緩和の指標であり、温度一定での導電率の圧力変化から導かれる。固体電解質に対しては一般にGPa級の圧力可変が必要で、これまで活性化体積に関する報告は歴史的にもごく限られたものであった。本手法は圧子圧入時に圧子直下に発生する高圧場を利用したインピーダンス測定でこれまでに無いオリジナルな成果であり、測定装置は自作した。

    DOI: 10.1016/j.ssi.2013.10.038

    Other Link: http://www.sciencedirect.com/science/article/pii/S0167273813005353

  • The state of P=Onb non- bridging oxygen and proton incorporation in binary MO·P2O5 (M=Ca, Mg) phosphate glasses Reviewed

    Yawara Takamatsu, Yusuke Daiko, Shinji Kohara, Kentaro Suzuya, Atsushi Mineshige, Tetsuo Yazawa

    Solid State Ionics   245-246   19 - 23   2013.09

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    2成分MO·P2O5ガラスの構造を放射光X線を用いて調べ、また当該ガラスへのプロトン導入量とプロトン導電率の関係について調べた。水素雰囲気下で通電(Pt電極)するとガラス中に水素ガスから解離したプロトンが注入され、ガラスのOH基濃度が増大した。OH基濃度の増加量と導電率の増加量は古くから知られるσ∝[H+]2で表され、キャリア(H+)濃度の増大と導電率の関係を定量的に明らかにした。FTIR測定によるP=Oピークシフトと導電率の関係から、非架橋酸素の電子密度がプロトン導入量と関係することが示された。

    DOI: 10.1016/j.ssi.2013.05.011

    Other Link: http://www.sciencedirect.com/science/article/pii/S0167273813002518

  • Proton conduction in glasses prepared via sol-gel and melting techniques Invited Reviewed

    Yusuke Daiko

    Journal of Ceramic Society of Japan   121   539 - 549   2013.07

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    これまでゾル-ゲル法および溶融法で作製されているガラスのプロトン伝導性についてまとめた(日本セラミックス協会進歩賞受賞)。

    DOI: 10.2109/jcersj2.121.539

    Other Link: https://www.jstage.jst.go.jp/article/jcersj2/121/1415/121_JCSJ-GR13081/_article/-char/ja/

  • Effect of plastic substrate on phase separation behavior and adhesion for RSi(OC2H5)3-Si(OC2H5)4 coatings prepared by sol-gel process Reviewed

    Y. Mizuta, Y. Daiko, A. Mineshige, T. Yazawa

    Ceramic International   39 ( 2 )   925 - 930   2013.03

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    メチルシルセスキオキサンおよびフェニルシルセスキオキサンを含むコーティングを様々な高分子基板にコートし、分相挙動と密着性について調べた。π電子および疎水性相互作用により、基板選択的に分相の生じることを明らかにした。

  • Preparatio of multilayered thin film fuel cell using titanium oxide as anodic catalyst via layer-by-layer assembly Reviewed

    Hisatoshi Sakamoto, Yusuke Daiko, Hiroyuki Muto, Mototsugu Sakai, Atsunori Matsuda

    Solid State Ionics   214   62 - 66   2012.04

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    DOI: 10.1016/j.ssi.2012.01.025

  • Preparation and fuel cell property of a phosphosilicate glass with proton transport number t H 1 at 400-500oC Reviewed

    Daiko, Y., Yamada, T., Mineshige, A., Kobune, M., Yazawa, T.

    Electrochemical and Solid-State Letters   14 ( 7 )   B63 - B65   2011.04

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  • Phase-separation and distribution of phenyl groups for PhTES-TEOS coatings prepared on polycarbonate substrate Reviewed

    Umeki, M., Daiko, Y., Yusa, S.-I., Mineshige, A., Kobune, M., Yazawa, T.

    Chemistry letters   40 ( 6 )   603 - 605   2011.03

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  • Thickness dependences of proton conductivity for ultrathin Nafion multilayers prepared via layer-by-layer assembly Reviewed

    Daiko, Y., Katagiri, K., Yazawa, T., Matsuda, A.

    Solid State Ionics   181   197 - 200   2010.02

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  • Thickness dependences of proton conductivity for ultrathin Nafion multilayers prepared via layer-by-layer assembly Invited Reviewed

    Daiko, Y., Katagiri, K., Yazawa, T., Matsuda, A.

    Solid State Ionics   181   197 - 200   2010.02

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  • Phase transition and proton conductivity of CsHSO4-WPA composites prepared by mechanical milling Invited Reviewed

    Daiko, Y., Nguyen, V.H., Yazawa, T., Muto, H., Sakai, M., Matsuda, A.

    Solid State Ionics   181   183 - 186   2010.02

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  • Nanometer scale proton conductivity and dynamics of csHSO4 and H3PW12O40 composites under non-humidified Invited Reviewed

    Daiko, Y., Hayashi, S., Matsuda, A.

    Chemistry of Materials   22 ( 11 )   3418 - 3425   2010.02

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  • In situ oxidation of alkanethiol groups and proton transfer in nanopores of sodium borosilicate glasses Reviewed

    Daiko, Y., Katayama, H., Araki, T., Mineshige, A., Kobune, M., Yusa, S.-I., Yazawa, T., Nagasaka, K., Murata, S., Matsumoto, S., Koiwai, A., Konomi, I.

    J. Phys. Chem. C   113   1891 - 1895   2009.01

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  • Highly hydrophobic flip-flop-type ultrathin coating films prepared via electrostatic self-assembly Invited Reviewed

    Daiko, Y., Katagiri, K., Matsuda, A.

    Journal of Nanoscience and Nanotechnology   9 ( 1 )   404 - 407   2009.01

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  • Proton conduction in thickness-controlled ultrathin polycation/ nafion multilayers prepared via layer-by-layer assembly Invited Reviewed

    Daiko, Y., Katagiri, K., Matsuda, A.

    Chemistry of Materials   20 ( 20 )   6405 - 6409   2008.09

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  • Formation of a high conductivity fuel cell electrolyte by pressing diphenylsiloxane-based inorganic-organic hybrid particles Reviewed

    Daiko, Y., Sakakibara, S., Sakamoto, H., Katagiri, K., Muto, H., Sakai, M., Matsuda, A.

    J. Am. Ceram. Soc.   92   S185 - S188   2008.06

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  • Mechanochemically synthesized cesium-ion-substituted phosphotungstic acid using several types of cesium-containing salts Invited Reviewed

    Daiko, Y., Takagi, H., Katagiri, K., Muto, H., Sakai, M., Matsuda, A.

    Solid State Ionics   179   1174 - 1177   2008.02

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  • Surface-sulfonation and fuel cell properties of phenylsilsesquioxane-based particles Invited Reviewed

    Daiko, Y., Ogura, K., Katagiri, K., Muto, H., Sakai, M., Matsuda, A.

    Solid State Ionics   179   1166 - 1169   2008.02

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