Updated on 2023/10/13

写真a

 
MATSUKAWA Yuko
 
Organization
Graduate School of Engineering Materials Chemistry 2 Assistant Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Chemistry and Biotechnology
Title
Assistant Professor
 

Papers 7

  1. Improvement of thermoelectric performance by optimizing chemical composition in single crystalline Ba<sub>8</sub>Cu<sub>x</sub>Si<sub>46−x</sub> clathrate Reviewed International journal

    Zilong Zhang, Yuko Matsukawa, Masahide Yasuda, Chiho Inoue, Yusuke Kimura, Shigeto Yamasaki, Makoto Arita, Shinji Munetoh

    Journal of Functionally Graded Materials   Vol. 35 ( 0 ) page: 8 - 12   2021.12

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    Language:English   Publisher:Functionally Graded Materials FORUM of Japan  

    <p>A series of single crystalline Ba<sub>8</sub>Cu<i><sub>x</sub></i>Si<sub>46-</sub><i><sub>x</sub></i> clathrate semiconductors with different Cu contents were successfully fabricated via Czochralski (CZ) method. The actual Cu content can increase with nominal Cu ratio, resulting in the higher values of Seebeck coefficient and electrical resistivity. Among the series, Ba<sub>7.89</sub>Cu<sub>4.66</sub>Si<sub>41.34</sub> sample shows a relatively high power factor of 0.688 mW/K<sup>2</sup> m at 500 °C. These results support that control of the Cu content leads to improvement of the power factor in Ba<sub>8</sub>Cu<i><sub>x</sub></i>Si<sub>46-</sub><i><sub>x</sub></i> clathrate thermoelectric materials.<b> </b></p>

    DOI: 10.14957/fgms.35.8

    CiNii Research

  2. Intrinsic p-type behavior and effect of Al doping on power factor in CrSi<sub>2</sub> thermoelectric materials Reviewed

    Takahiro Orita, Yuko Matsukawa, Kazuhiro Ichino, Makoto Arita, Shinji Munetoh

    Journal of Functionally Graded Materials   Vol. 36 ( 0 ) page: 13 - 18   2023.12

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Functionally Graded Materials FORUM of Japan  

    <p>Chromium disilicide (CrSi<sub>2</sub>) is generally known as a p-type degenerate semiconductor whose power factor can be improved by substitution of Al on the Si site. However, it has not been clarified why holes are majority carriers in pure CrSi<sub>2</sub> nor how the thermoelectric properties of CrSi<sub>2−</sub><i><sub>x</sub></i>Al<i><sub>x</sub></i> depend on the temperature above 400 °C. In this paper, we prepared CrSi<sub>2−</sub><i><sub>x</sub></i>Al<i><sub>x</sub></i> samples with <i>x</i> ranging from 0.00 to 0.20. The composition ratio in each sample measured by Wavelength-dispersive X-ray spectroscopy (WDX) showed that the sum of Si and Al to Cr was less than the stoichiometric ratio. The electronic density of states calculated by first principles calculation based on density functional theory revealed that the atomic vacancies on the Si sites, whose existence was implied by WDX, can supply holes. Comparing thermoelectric properties of the samples at 500 °C, the sample with nominal composition CrSi<sub>1.96</sub>Al<sub>0.04</sub> showed the highest power factor 0.606 mW m<sup>−1</sup> K<sup>−2</sup>.</p>

    DOI: 10.14957/fgms.36.13

    CiNii Research

  3. Improvement of the thermoelectric performance of boron-doped silicon by blocking minority carrier diffusion on the p<sup>+</sup>/p interface Reviewed

    Momoka Sakamoto, Yuko Matsukawa, Rikuto Sasaoka, Kohei Minoshima, Eisuke Nakamura, Makoto Arita, Shinji Munetoh

    Japanese Journal of Applied Physics   Vol. 62 ( 7 ) page: 075505 - 075505   2023.7

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

    Abstract

    A two-layer bulk Si material with different boron concentrations was prepared using spark plasma sintering to improve its thermoelectric performance by blocking minority carrier diffusion across its interfaces. The sintered two-layer sample (p<sup>+</sup>/p-Si) was cut to include the interface. Two monolayer samples (p<sup>+</sup>-Si, p-Si) were prepared for comparison. Seebeck coefficient mapping of the p<sup>+</sup>/p-Si surface by thermal probing confirmed a Seebeck coefficient gap between the two p-type Si layers, indicating that a band offset exists at the interface. When compared with the average resistivities and voltages for p<sup>+</sup>-Si and p-Si, the electrical resistivity in the p<sup>+</sup>/p-Si sample is almost identical, but the thermoelectric voltage is higher when the p<sup>+</sup>-part is heated more than the p-part. This indicates that bipolar carrier transport inhibition in the band offset improved the thermoelectric voltage. This bandgap engineering process and principle can be extended to other thermoelectric materials that can be processed via powder sintering.

    DOI: 10.35848/1347-4065/ace4af

    Web of Science

    Scopus

    Other Link: https://iopscience.iop.org/article/10.35848/1347-4065/ace4af/pdf

  4. Topochemical Synthesis of LiCoF<sub>3</sub> with a High-Temperature LiNbO<sub>3</sub>-Type Structure

    Yumi Matsuo, Yuko Matsukawa, Masahiro Kitakado, George Hasegawa, Suguru Yoshida, Ryoto Kubonaka, Yuya Yoshida, Tatsushi Kawasaki, Eiichi Kobayashi, Chikako Moriyoshi, Saneyuki Ohno, Koji Fujita, Katsuro Hayashi, Hirofumi Akamatsu

    Inorganic Chemistry   Vol. 61 ( 30 ) page: 11746 - 11756   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.inorgchem.2c01439

    Web of Science

    PubMed

  5. Kinetic effects of polymorphs and surface areas on adsorption and photocatalytic decomposition of acetaldehyde on titania

    Yuko Matsukawa, Shingo Hirata, Miki Inada, Naoya Enomoto, Junichi Hojo, Katsuro Hayashi

    Chemical Engineering Journal   Vol. 397   page: 125422 - 125422   2020.10

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier {BV}  

    Adsorption and photocatalytic decomposition behaviors of gas-phase acetaldehyde (CH CHO), together with carbon dioxide (CO ) formation have been measured for pure titania (TiO ) powders with three types of polymorphs (anatase, brookite, and rutile) under UV-light illumination, and assessed by a kinetic model that takes into account the immediate decomposition of CH CHO attached on the surface, and the gradual decomposition of CH CHO adsorbed on the surface. Experimental data are well reproduced by the present model, highlighting how adsorption-related pathways markedly contribute to overall CH CHO removal kinetics even for pure titanias. Although the initial removal rate depends on the surface area, which affects the adsorption capacity, it is suggested that specific surface area-based adsorbability and decomposition reactivity are enhanced by heightened crystallinity. Our kinetic analysis demonstrates that anatase exhibits the highest photocatalytic activity as a result of superior adsorbability, as well as superior decomposition reactivity, compared to other polymorphs. 3 2 2 3 3 3

    DOI: 10.1016/j.cej.2020.125422

    Web of Science

    Scopus

  6. Gas sorption porosimetry for the evaluation of hard carbons as anodes for Li- and Na-ion batteries

    Yuko Matsukawa, Fabian Linsenmann, Maximilian Arthur Plass, George Hasegawa, Katsuro Hayashi, Tim-Patrick Fellinger

    Beilstein Journal of Nanotechnology   Vol. 11   page: 1217 - 1229   2020.8

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

    DOI: 10.3762/bjnano.11.106

    Web of Science

    PubMed

  7. Topotactic Synthesis of Mesoporous 12CaO·7Al2O3 Mesocrystalline Microcubes toward Catalytic Ammonia Synthesis

    George Hasegawa, Shizuka Moriya, Miki Inada, Masaaki Kitano, Masaaki Okunaka, Takahisa Yamamoto, Yuko Matsukawa, Kazuma Nishimi, Kazunari Shima, Naoya Enomoto, Satoru Matsuishi, Hideo Hosono, Katsuro Hayashi

    Chemistry of Materials   Vol. 30 ( 14 ) page: 4498 - 4502   2018.7

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    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acs.chemmater.8b01819

    Web of Science

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Presentations 26

  1. Coドープβ-FeSi<sub>2</sub>の組成傾斜による熱起電力の向上

    松川祐子, 森元翔也, 堀千咲, 木村祐介, 有田誠, 宗藤伸治

    第31回新構造・機能制御と傾斜機能材料シンポジウム  2022.10.27 

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    Event date: 2022.10

    Language:Japanese  

    Venue:長崎県壱岐市   Country:Japan  

  2. 共沈降法による組成傾斜化Alドープ<i>β</i>-FeSi<sub>2</sub>の熱電発電特性

    青木 航介, 佐伯 龍聖, 松川 祐子, 有田 誠, 宗藤 伸治

    第32回新構造・機能制御と傾斜機能材料シンポジウム  2023.9.14 

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    Event date: 2023.9

    Presentation type:Oral presentation (general)  

  3. Czochralski法で作製したBa<sub>8</sub>Cu<sub>6</sub>Ge<sub>40−<i>x</i></sub>Si<sub><i>x</i></sub>クラスレートの熱電性能

    高木 健太郎, 荒木 脩斗, 佐伯 龍聖, 松川 祐子, 有田 誠, 宗藤 伸治

    第32回新構造・機能制御と傾斜機能材料シンポジウム  2023.9.15 

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    Event date: 2023.9

  4. p<sup>+</sup>/p-Si界面におけるキャリア拡散の制御を用いた熱起電力の向上

    行事 明, 青木 航介, 佐伯 龍聖, 松川 祐子, 有田 誠, 宗藤 伸治

    第32回新構造・機能制御と傾斜機能材料シンポジウム  2023.9.15 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  5. Effect of heat treatment on the structure and physical properties of <sub><i>x</i></sub>CoF<sub>3</sub> synthesized by low-temperature topochemical reaction

    Juko Yamada, Yumi Matsuo, Yuko Matsukawa, Saneyuki Ohno, Katsuro Hayashi, Hirofumi Akamatsu, Koji Fujita, Yohei Onodera

    The 36th Fall Meeting  2023.9.8  The Ceramic Society of Japan

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    Event date: 2023.9

    Presentation type:Oral presentation (general)  

    Venue:Kyoto Institute of Technology Matsugasaki Campus   Country:Japan  

  6. 高温ニオブ酸リチウム型構造をもつ Li<sub>x</sub>CoF<sub>3</sub>のトポケミカル合成と局所構造解析

    赤松 寛文, 松尾 祐美, 松川 祐子, 大野 真之, 林 克郎, 小野寺 陽平

    公益社団法人日本セラミックス協会 2023年年会  2023.3.9 

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    Event date: 2023.3

    Language:Japanese  

    Venue:神奈川県横浜市   Country:Japan  

  7. Sn存在下でのSPS法によるBa<sub>8</sub>Cu<sub>x</sub>Ge<sub>46−x</sub>クラスレートの熱電性能向上

    簑島航平, 松川祐子, 有田誠, 宗藤伸治

    第31回新構造・機能制御と傾斜機能材料シンポジウム  2022.10.27 

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    Event date: 2022.10

    Language:Japanese  

    Venue:長崎県壱岐市   Country:Japan  

  8. Czochralski 法で作製した Sr<sub>8</sub>Al<sub>x</sub>Ga<sub>16−x</sub>Si<sub>30</sub> クラスレートの熱電性能に Al 置換が与える影響

    荒木脩斗, 高木健太郎, 松川祐子, 有田誠, 宗藤伸治

    第31回新構造・機能制御と傾斜機能材料シンポジウム  2022.10.28 

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    Event date: 2022.10

    Language:Japanese  

    Venue:長崎県壱岐市   Country:Japan  

  9. p-Si/p<sub>+</sub>-Si及びn-Si/n<sub>+</sub>-Siの温度勾配垂直方向熱電発電特性

    隈河拓斗, 木瀬浩輝, 松川祐子, 有田誠, 宗藤伸治

    第31回新構造・機能制御と傾斜機能材料シンポジウム  2022.10.27 

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    Event date: 2022.10

    Language:Japanese  

    Venue:長崎県壱岐市   Country:Japan  

  10. p/n-Si薄膜接合素子の試作と熱電発電特性

    岡坂達也, 宮本悠希, 松川祐子, 有田誠, 宗藤伸治

    第31回新構造・機能制御と傾斜機能材料シンポジウム  2022.10.28 

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    Event date: 2022.10

    Language:Japanese  

    Venue:長崎県壱岐市   Country:Japan  

  11. p型Ba<sub>8</sub>Cu<sub>x</sub>Ge<sub>46−x</sub>クラスレートの多層化による熱起電力の向上

    森元翔也, 香月佑斗, 松川祐子, 有田誠, 宗藤伸治

    第31回新構造・機能制御と傾斜機能材料シンポジウム  2022.10.27 

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    Event date: 2022.10

    Language:Japanese  

    Venue:長崎県壱岐市   Country:Japan  

  12. キャリア濃度の異なるp型CrSi<sub>2</sub>の積層による熱電発電能力向上

    折田 昂優, 一野 和寛, 松川 祐子, 有田 誠, 宗藤 伸治

    公益社団法人日本セラミックス協会 第 35 回秋季シンポジウム  2022.9.16 

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    Event date: 2022.9

    Language:Japanese  

    Venue:徳島県徳島市   Country:Japan  

  13. 縮退p/n-Siを用いた等温環境下における熱-電力変換特性

    隈河 拓斗, 松川 祐子, 有田 誠, 宗藤 伸治

    2022年度日本金属学会九州支部・ 日本鉄鋼協会九州支部・軽金属学会九州支部・ 合同学術講演会  2022.6.4 

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    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  14. チョクラルスキー法によるp型Ba8CuxGe46-xクラスレートの高性能化

    高木 健太郎, 荒木 修斗, 松川 祐子, 有田 誠, 宗藤 伸治

    2022年度日本金属学会九州支部・ 日本鉄鋼協会九州支部・軽金属学会九州支部・ 合同学術講演会  2022.6 

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    Event date: 2022.6

    Language:Japanese  

    Venue:オンライン  

  15. 内部電界を導入したp型Si 2層試料における高密度化による熱電性能向上の検証

    青木 航介, 笹岡 陸人, 松川 祐子, 有田 誠, 宗藤 伸治

    2022年度日本金属学会九州支部・ 日本鉄鋼協会九州支部・軽金属学会九州支部・ 合同学術講演会  2022.6 

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    Event date: 2022.6

    Language:Japanese  

    Venue:オンライン  

  16. Ba8AlxSi46−x単結晶の2層試料における熱電性能に対する組成の影響

    荒木 脩斗, 松川 祐子, 有田 誠, 宗藤 伸治

    オンラインフォーラムFGMs2021  2021.12.18 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  17. 単結晶化によるBa8CuxSi46−xクラスレートの低比抵抗化

    仲矢 彩花, 簑島 航平, 荒木 脩斗, 笹岡 陸人, 松川 祐子, 有田 誠, 宗藤 伸治

    オンラインフォーラムFGMs2021  2021.12.18 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  18. Ga溶媒を利用したβ-FeSi2の低温晶出

    森元 翔也, 木村 祐介, 堀 千咲, 松川 祐子, 有田 誠, 宗藤 伸治

    オンラインフォーラムFGMs2021  2021.12.18 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  19. p-Si 2層試料の内部電界が熱起電力に及ぼす効果

    笹岡 陸人, 中村 英介, 坂本 百香, 松川 祐子, 有田 誠, 宗藤 伸治

    オンラインフォーラムFGMs2021  2021.12.18 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  20. p-Si/n-Siの温度勾配垂直方向熱電発電に及ぼすドーピング濃度の影響

    木瀬 浩輝, 松川 祐子, 有田 誠, 宗藤 伸治

    オンラインフォーラムFGMs2021  2021.12.18 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  21. p型Ba-Au-Siクラスレート試料のCZ法を用いた組成傾斜による熱電発電効果

    木村 祐介, 松川 祐子, 有田 誠, 宗藤 伸治

    オンラインフォーラムFGMs2021  2021.12.18 

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  22. Topochemical Synthesis of Low Tolerance Factor Perovskite-type Fluoride LixCoF3

    MATSUO Yumi, MATSUKAWA Yuko, KITAKADO Masahiro, AKAMATSU Hirohumi, HASEGAWA Jouji, YOSHIDA Suguru, Ohno Saneyuki, HAYASHI Katsuro

    The Ceramic Society of Japan The 34th Fall Meeting  2021.9.3 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  23. 溶媒を利用した低温晶出によるβ-FeSi2単結晶作製の検討

    森元 翔也, 木村 祐介, 松川 祐子, 有田 誠, 宗藤 伸治

    2021年度日本金属学会九州支部・ 日本鉄鋼協会九州支部・軽金属学会九州支部・ 合同学術講演会  2021.6.11 

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    Event date: 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  24. CZ法を用いた二段階引き上げにより電位障壁を形成したBaAlSiクラスレートの熱電特性

    荒木 脩斗, 井上 千穂, 松川 祐子, 有田 誠, 宗藤 伸治

    2021年度 日本金属学会九州支部・日本鉄鋼協会九州支部・軽金属学会九州支部合同講演大会  2021.6.11 

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    Event date: 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  25. n-Si薄膜/p-Si構造の形成と温度勾配付与時の電位分布観察

    岡坂 達也, 木瀬 浩輝, 松川 祐子, 有田 誠, 宗藤 伸治

    2021年度 日本金属学会九州支部・日本鉄鋼協会九州支部・軽金属学会九州支部合同講演大会  2021.6.11 

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    Event date: 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  26. フェルミ準位の異なるn型Ba8AlxSi46-xクラスレート二層接合による熱起電力向上

    簑島 航平, 中村英介, 有田 誠, 松川祐子, 宗藤 伸治

    2021年度 日本金属学会九州支部・日本鉄鋼協会九州支部・軽金属学会九州支部合同講演大会  2021.6.11 

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    Event date: 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

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Research Project for Joint Research, Competitive Funding, etc. 1

  1. クラスレート熱電変換材料の単結晶に基づく多角的な解析と設計

    Grant number:21K20489  2021 - 2022

    科学研究費助成事業  研究活動スタート支援

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3120000 ( Direct Cost: \2400000 、 Indirect Cost:\720000 )

 

Social Contribution 4

  1. 令和5年度九州大学QURIESプログラム

    Role(s):Advisor

    九州大学男女共同参画推進室  2023.8

  2. 大学での材料研究に生きる高校での学び

    Role(s):Lecturer

    九州大学男女共同参画推進室  令和4年度 QURIES プログラムオリエンテーション  九州大学伊都キャンパス  2022.8

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    Audience: High school students

    Type:Lecture

    女性研究者の研究活動紹介、質疑応答

  3. 長崎県立諫早高校の工学部訪問

    Role(s):Lecturer, Demonstrator

    九州大学工学部評価広報室  2022.8

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    Audience: High school students

    Type:University open house

    大学生活や研究活動について紹介すると共に、熱電材料についてのデモ実験や設備の解説を行った。

  4. 温故知新の前と後:応化育ち材工新人の経験・抱負

    Role(s):Lecturer

    九州大学親和会  令和4年度九州大学親和会第43回総会および講演会  九州大学伊都キャンパス  2022.4

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    Audience: College students, Graduate students, Teachers, Researchesrs, General

    Type:Other

    学生時代の研究活動・研究室生活の経験に基づいて、後輩にあたる大学生・大学院生に向けての助言・勧めを含んだ講演を行った。また学内外からの参加者向けに、現在の研究活動の一端も紹介した。