Taguchi, Yoshihiro

写真a

Affiliation

Faculty of Science and Technology, Department of System Design Engineering ( Yagami )

Position

Professor

E-mail Address

E-mail address

Related Websites
Scopus Paper Info  
Paper Count: 89 Citation Count: 472 h-index: 11

Click to view the Scopus page. The data was downloaded from Scopus API in July 26, 2026, via http://api.elsevier.com and http://www.scopus.com .

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Books 【 Display / hide 】

  • ナノ・マイクロスケール熱物性ハンドブック

    長坂雄次, 斎木敏治, 田口良広　他, 養賢堂, 2014

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Papers 【 Display / hide 】

  • Pulsed Laser Viscometer: Accurate High-Speed Sensing Technique for Viscosity and Surface Tension of Liquids

    Nagasaka Y., Shibata K., Taguchi Y.

    International Journal of Thermophysics 47 ( 4 )  2026.04

    ISSN  0195928X

    　View Summary

    The pulsed laser viscometer (PLV) measures viscosity and surface tension using nanoscale liquid surface deformation generated by two-beam interference of a pulsed heating laser and detects damping oscillation from the first-order diffracted intensity of a probing laser. PLV features (1) non-contact and in situ measurement, (2) high spatial resolution of 10 to 100 μm, (3) high time resolution of microseconds to milliseconds, (4) small sample volume of microliters to milliliters, and (5) a wide viscosity range of 0.1 to 10<sup>4</sup> mPa·s. We established the PLV theory by solving the Navier‒Stokes‒Thermoelastic equation for volumetric heating of a liquid by a weakly absorbed pulsed laser. A new PLV experimental apparatus was developed using a pulsed YAG laser with a wavelength of 1064 nm as the heating laser, and experiments used six liquid samples (acetone, toluene, water, ethanol, 2-propanol, and 1-hexanol) at room temperature to verify that the instrument operates according to the theory. Measured viscosities agree with the literature values with an average deviation of 3.2 %. Measured surface tension agrees with the literature values with an average deviation of 6.2 %. Uncertainties are estimated at 2 % for viscosity and 3 % for surface tension. The temperature rise of the sample during the experiment was less than 0.01 K. Furthermore, the technique was found to be sensitive only to viscosity and surface tension, and insensitive to the values ​​of other thermophysical properties required for processing the data.

  • Flow-driven construction of capillary-scale vessels with predefined geometries in natural hydrogels

    Ono A., Ouchi R., Kumagai Y., Suda M., Yamashita T., Taguchi Y., Sudo R.

    Materials Today Bio 35 2025.12

    　View Summary

    Forming capillary networks with predefined geometries is a critical challenge in engineering complex three-dimensional tissues in vitro. While bioprinting and microfluidic technologies have enabled vascular tissue fabrication, precise control over capillary-scale vascularization remains limited. In this study, we investigated vascular formation process along hydrogel microchannels to elucidate mechanisms governing capillary-scale lumen formation. Microchannels were fabricated by femtosecond laser ablation in collagen and fibrin hydrogels. We optimized multiphoton lithography parameters to fabricate microchannels within these hydrogels and analyzed vascular formation along the channels. Luminal vascular structures formed readily in 50-μm channels, while vascular formation failed in 20-μm channels under static conditions, suggesting a significant shift in endothelial organization at the cellular scale. Flow stimulation significantly promoted vessel formation through collective endothelial cell migration and adhesion, whereas static conditions induced endothelial-to-mesenchymal transition. These findings provide key insights into capillary-scale vascularization and contribute to the development of more complex architectures with predefined shapes.

  • Diffusion Coefficients of Surface Modified Liposomes and Thermo-sensitive Liposomes Measured by Optoelectronically Induced Transient Grating Method

    Kamata M., Shishido R., Oura M., Kojima I., Taguchi Y.

    International Journal of Thermophysics 46 ( 11 )  2025.11

    ISSN  0195928X

    　View Summary

    Liposomal products enable new therapies through the protection and controlled release of encapsulated medicines. The diffusion coefficient of a liposome is associated with its size and surface properties, and its measurement is important in the evaluation of the product and design of new drug delivery systems. We propose a rapid and label-free diffusion sensing method using light-induced dielectrophoresis for high-throughput analysis of liposomal products. In this study, the diffusion coefficient of liposomes with a diameter of approximately 100 nm was measured by observing the mutual diffusion within a few seconds. Prior to the measurement, a parametric study of the excitation conditions was performed to achieve highly efficient manipulation of liposomes by light-induced dielectrophoresis. The validation of the proposed measurement method for liposomes was demonstrated by comparing the result of observation by the transmission electron microscope. The effect of the surface functional groups of the liposomes was quantitatively evaluated using diffusion coefficient measurements. Furthermore, the thermo-sensitive liposomes were measured to demonstrate their sensitivity to phase transition during temperature change.

  • Flexible and Broadband Long-Wavelength Infrared Radiator Based on a Pixel Pattern Metamaterial for Space Cryogenic Applications

    Saisho Y., Tachikawa S., Sakurai A., Taguchi Y.

    International Journal of Thermophysics 46 ( 8 )  2025.08

    ISSN  0195928X

    　View Summary

    This study proposes the design of an ultra-far-infrared broadband metamaterial radiator for space cryogenic applications. To achieve a flexible broadband radiator without significant structural complexity, the proposed radiator employs a flexible glass sheet as an intermediate dielectric layer and a QR code-like pixel-patterned periodic metal structure. A genetic algorithm is used to design the radiator, followed by fabrication using microfabrication techniques. The results of the reflectance spectrum measurements by FTIR were in general agreement with the analytical results, thereby confirming the broadband radiation characteristics. The total hemispherical emittance, which is an evaluation index for space radiators, was estimated to be 0.57 at 20 K. Compared with the conventional radiator material of 80-μm black paint, the total hemispherical emittance was markedly enhanced, despite a film thickness ratio of 19.9 % and an area density ratio of 53.7 %. Therefore, the proposed radiator is expected to facilitate the development of cryogenic radiators with reduced weight and flexibility while minimizing the risk of contamination. This is a significant consideration for infrared astronomy missions that require cryogenic temperatures.

  • Quadrant kirigami-type electrothermal MEMS actuator with multi-degree-of-freedom morphing capability

    Tsutsui T., Taguchi Y., Hashimoto M.

    Journal of Micromechanics and Microengineering 35 ( 2 )  2025.02

    ISSN  09601317

    　View Summary

    Kirigami design principles have been widely applied to develop thermally responsive shape-morphing devices across various scales. However, the multi-degree-of-freedom (multi-DoF) morphing capabilities of microelectromechanical-systems (MEMS)-scale kirigami devices under localized Joule heating remain largely unexplored. This paper presents a quadrant kirigami-type electrothermal MEMS actuator with multi-DoF morphing capabilities, demonstrating both one-dimensional piston motion and two-dimensional (2D) tilting motion. The actuator, fabricated using surface and bulk micromachining techniques, features four independent electrical circuits, creating four electrothermally separated quadrants within the MEMS-scale kirigami structure. The temperature distribution within each quadrant of the actuator, subjected to localized Joule heating, was experimentally examined using thermography, revealing distinct temperature contrasts. The actuator demonstrated multi-DoF morphing capabilities, achieving a 2D tilting angular displacement of approximately 10° at 70 mW and a vertical piston displacement of 1.5 mm at 135 mW. These experimental results validate that the electrothermal quadrant design, leveraging localized Joule heating, enhances the DoF morphing capabilities of kirigami-type electrothermal MEMS actuators.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Presentations 【 Display / hide 】

  • Research on the effects of metallic microparticles on the thermophysical properties of composite resins

    Tengyu Li, Yoshihiro Taguchi

    [International presentation]  ATPC 2025 (Shanghai, China) , 

    2025.10

  • Development of high-speed, non-contact dry eye syndrome diagnostic method using optical viscometry

    Riku Takeuchi,Taketo Onishi, Yoshihiro Taguchi

    [International presentation]  Asian Thermophysical Properties Conference (ATPC) 2025 (Shanghai, China) , 

    2025.10
    , 

    Oral presentation (general)

  • Research on High-viscosity Droplet Manipulation for Fabrication of Dielectric Structure and Enhancement of Dielectrophoretic Force

    Yuki Kawasu, Makoto Kamata, Yoshihiro Taguchi

    Asian Thermophysical Properties Conference (ATPC) 2025 (Shanghai, China) , 

    2025.10

  • 光子吸収3D プリンティングで作製したマイクロ構造物の熱伝導率測定

    野村 雄亮, 木部 湧斗,田口 良 広

    [Domestic presentation]  第46回日本熱物性シンポジウム (佐賀県佐賀市) , 

    2025.10
    , 

    Oral presentation (general), 日本熱物性学会

  • Multi-Photon 3D Bioprinting of Scaffold Structures for Blood Vessel Formation Using Femtosecond Laser

    Masahiko Suda, Akira Ono, Ryo Sudo, Yoshihiro Taguchi

    [International presentation]  the 30th International Conference on Optical MEMS and Nanophotonics Chiang Mai, Thailand, (Chiang Mai, Thailand) , 

    2025.07
    , 

    Oral presentation (general)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • Development of super resolved multi-material 3D printing based on thermophysical palette

    2025.04
    -
    2028.03

    基盤研究(B), Principal investigator

  • 極微量液滴内の分離・濃縮・混合・分析を実現する樹脂製マイクロ熱流体デバイスの創製

    2022.04
    -
    2025.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 基盤研究(B), Principal investigator

  • モノリシック光電子ピンセットの創成とオンチップ分離濃縮・拡散センシングの実現

    2018.04
    -
    2022.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Principal investigator

  • Nanoscale Optical Thermometry using Near-field Optics for Thermal Control of Nanodevices

    2015.04
    -
    2018.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Principal investigator

  • Development of micro diffusion sensor using optical MEMS

    2015.04
    -
    2017.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Challenging Exploratory Research, Principal investigator

    　View Summary

    The diffusion coefficients of biological molecules, such as proteins, reflect their size, molecular structure, conformational changes, and inter-molecular interactions. Therefore, how the diffusion coefficient of biological samples changes in liquid solution is essential knowledge for clinical diagnosis and drug discovery. In this study, novel techniques such as (1) the simple fabrication technique of hydrogenated amorphous silicon, (2) the optical sorting technique for the high sensitive measurement, and (3) the new channel structure applicable for the biological sample, have been developed.

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Intellectual Property Rights, etc. 【 Display / hide 】

  • 流量測定装置、流量測定方法および流量測定プログラム

    Date applied： 2016-24530   

    Patent, Joint

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Awards 【 Display / hide 】

  • 熱工学部門貢献表彰

    田口良広, 2024.10, 日本機械学会

  • 日本熱物性学会賞論文賞

    橋本将明，田口良広, 2021.10, 日本熱物性学会, ミリ長ストローク・低電力熱駆動切り紙MEMSアクチュエータの開発　－薄膜バイモルフの熱・機械応答特性－

  • ATPC2019 Best Paper Award

    Takuma Iwagi, Yoshihiro Taguchi, Yuji Nagasaka, 2019.10, Asian Thermophysical Properties Conference, Development of a Small Optical Rotation Measurement System Using a Hollow Motor with Half-wave-retader Plate with Multiple Probing Laser for Measurement of Dilute Glucose Aqueous Solution

  • 日本機械学会熱工学部門講演論文表彰

    鎌田慎, 山田幹, 田口良広, 長坂雄次, 2018.10, 日本機械学会熱工学部門, Development of Micro Fluidic System for High-speed Diffusion Measurement

  • 日本学術振興会科学研究費補助金審査員表彰

    2017.09, 日本学術振興会

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Courses Taught 【 Display / hide 】

  • SYSTEM DESIGN ENGINEERING PRACTICAL RESEARCH (INTERNATIONAL) B

    2026

  • GLOBAL INTERNSHIP PROGRAM IN SYSTEM DESIGN ENGINEERING A

    2026

  • GLOBAL INTERNSHIP PROGRAM IN SYSTEM DESIGN ENGINEERING B

    2026

  • LABORATORIES IN SYSTEM DESIGN ENGINEERING 1)

    2026

  • GRADUATE RESEARCH ON ENGINEERING AND DESIGN 2

    2026

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Memberships in Academic Societies 【 Display / hide 】

  • 日本機械学会, 

    2013
    -
    Present

  • （公社）日本伝熱学会, 

    2012
    -
    Present

  • 2012 International Conference on Solid State Devices and Materials, 

    2012
    -
    Present

  • ㈳日本伝熱学会, 

    2011
    -
    Present

  • ㈳日本伝熱学会, 

    2011
    -
    Present

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Committee Experiences 【 Display / hide 】

  • 2013
    -
    Present

    専門調査員, 文部科学省科学技術政策研究所

  • 2013
    -
    Present

    熱工学部門運営委員, 日本機械学会

  • 2013

    論文委員, 2013 International Conference on Solid State Devices and Materials

  • 2012
    -
    Present

    協議員, （公社）日本伝熱学会

  • 2012

    論文委員, 2012 International Conference on Solid State Devices and Materials

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