Papers

Journal papers

2025

1. R.Matsuda, Y.Isano, H.Ota, “Stretchable composites with electrical conductivity”, Flexible and Printed Electronics, 10,  013001, 2025.
2. R. Matsuda, Y. Isano, K. Onishi, H. Ota*, F. Inoue*, “Direct PhysicalVapor Deposition ofLiquid Metalon TreatedMetal Surface.“, ACS Applied Electronic Materials, 2025(in press) *equal to corresponding author
3. A. Uozumi, I. Ohara, M. Shimamura, K. Iwama, A. Fukuyama, H. Horiguchi, Y. Isoda, F. Kimura, H. Ota*, S. Ito*,“Clinical evaluation of the installation conditions and accuracy of wearable neonatal jaundice meter.“, Scientifi reports, 15, 12909, 2025. *equal to corresponding author

2024

1. Y. Isano, M. Takaya, Y. Kurotaki, R. Matsuda, Y. Miyake, T. Takano, Y. Isoda, T. Hamagami, K. Kuribayashi, H. Ota, “Soft intelligent systems based on stretchable hybrid devices integrated with machine learning“, Device, 100496, 2024 https://doi.org/10.1016/j.device.2024.100496
2. H. Kawakami, K. Nagatake, S. Ni, F. Nakamura, T. Takano, K. Murakami, I. Ohara, Y. Isano, R. Matsuda, H. Suwa, R. Higashi, M. Kanto, M. Saito, H. Fujita, T. Araki, S. Ozaki, K. Ueno, T. Horii, T. Fujie, H. Ota, “R2R-Based Continuous Production of Patterned and Multilayered Elastic Substrates with Liquid Metal Wiring for Stretchable Electronics“, Advanced Materials Technologies, 2400487, 2024
3. Y. Ozawa, Y. Nishitai, N. Ochirkhuyag, N. Usami, M. Kanto, K. Ueno, H. Ota, “Liquid Metal Electrode Ink for Printable Lithium Ion Batteries.“, Advanced Engineering Materials, 2400529, 2024.

2023

1. K. Murakami, Y. Isano, J. Asada, N. Usami, Y. Isoda, T. Takano, R. Matsuda, K. Ueno, O. Fuchiwaki, Hiroki Ota, “Self-assembling bilayer wiring with highly conductive liquid metal and insulative ion gel layers.“, Scientific Reports, volume 13, Article number: 5929, 2023.
2. R. Matsuda, Y. Isano, K. Ueno, H. Ota, “Highly Stretchable and Sensitive Silicone Composites with Positive Piezoconductivity Using Nickel Powder and Ionic Liquid.“, APL Bioengineering, 7, 016108, 2023.
3. N. Ochirkhuyag, Y. Isano, K. Inoue, H. Ota, “Biphasic Liquid Metal Mixtures in Stretchable and Flexible Applications.”, Sensors and Diagnostics, Accepted 2023.

2022

1. R. Matsuda, Z. Song, H. Ota, “Electro-powerless balloon soft actuator with manually driven fluidic circuit.”, Advanced Electronic Materials,Accepted 2022.
2. N. Ochirkhuyag, Y. Nishitai, S. Mizuguchi, Y. Isano, S. Ni, K. Murakami, M. Shimamura, H. Iida, K. Ueno, and H. Ota, “Stretchable Gas Barrier Films Using Liquid Metal toward a Highly Deformable Battery“,ACS applied materials and interfaces,Accepted 2022.
3. Y. Isano, H. Fujita, K. Murakami, S. Ni, Y. Kurotaki, T. Takano, Y. Isoda, R. Matsuda, F. Nakamura, Y. Nishitai, N. Ochirkhuyag, K. Inoue. H. Kawakami, Y. Okubo, K. Ueno, T. Fujie, H. Ota, “Transparent and Breathable Ion Gel-based Sensors towards Multimodal Sensing Ability.”, Advanced Materials Technologies, 2200209, 2022.
4. K. Murakami, R. Tochinai, D. Tachibana, Y. Isano, R. Matsuda, F. Nakamura, Y. Kurotaki, Y. Isoda, M. Yamane, Y. Sugita, J. Fukuda, K. Ueno, N. Miki, O. Fuchiwaki, H. Ota, “Direct wiring of liquid metal on ultrasoft substrate using a polyvinyl alcohol lift-off method.“, ACS Applied Materials & Interfaces, 2022 (Accepted).
5. D. Tachibana, K. Murakami, T. Kozaki, R. Matsuda, Y. Isoda, F. Nakamura, Y. Isano, K. Ueno, O. Fuchiwaki, H. Ota, “Ultrafast and Highly Deformable Electromagnetic Hydrogel Actuators Assembled from Liquid Metal Gel Fiber.“, Advanced Intelligent Systems, 2100212, 2022.

2021

2020

2019

1. D. Tachibana, K. Matsubara, R. Matsuda, T. Furukawa, S. Maruo, Y. Tanaka, O. Fuchiwaki, H. Ota, “3D Helical Micromixer Fabricated by Micro Lost‐Wax Casting.”, Advanced Materials Technologies. 1900794, 2019
2. W. Gao, H. Ota, D. Kiriya, K. Takei, A. Javey, “Flexible Electronics toward Wearable Sensing“,  Accounts of Chemical Research, 52(3), 523-533, 2019.・Selected as the cover art of Accounts of Chemical Research.

2018

1. L.-C. Tai, W. Gao, M. Chao, M. Bariya, Q. P. Ngo, Z. Shahpar, H. Y. Y. Nyein, H. Park, J. Sun, Y. Jung, E. Wu, H. M. Fahad, D.-H. Lien, H. Ota, G. Cho, A. Javey, “Methylxanthine drug monitoring with wearable sweat sensors“, Advanced Materials, 1707442, 2018.

2017

1. J. Bullock, H. Ota, H. Wang, Z. Xu, M. Hettick, D. Yan, C. Samundsett, Y. Wan, S. Essig, M.M. -Masis, A. Cuevas, A. Javey, “Microchannel contacting of crystalline silicon solar cells.“, Scientific reports, 7(1), 9085, 2017.
2. Y. Gao*, H. Ota*, E. W. Schaler, K. Chen, A. Zhao, W. Gao, H. M. Fahad, Y. Leng, A. Zheng, F. Xiong, C. Zhang, L. -C. Tai, P. Zhao, R. S. Fearing, A. Javey, “Wearable Microfluidic Diaphragm Pressure Sensor for Health and Tactile Touch Monitoring.“, Advanced Materials, 1701985, 2017. ※equal contribution ・Selected as the Inside front cover art of Advanced Materials.
3. H. Ota, M. Chao, Y. Gao, E. Wu, L. -C. Tai, K. Chen, Y. Matsuoka, K. Iwai, H. Fahad, W. Gao, H. Y. Y. Nyein, L. Lin, A. Javey, “3D Printed Earable Smart Devices for Real-time Detection of Core Body Temperature.“, ACS Sensors, 2(7), 990-997, 2017. ・Selected as an editors’ choice of ACS ・Highlighted in “3D-Printed “Earable” Sensor Monitors Vital Signs”, IEEE Spectrum, posted 27 July, 2017 ・Highlighted in “Forget wristbands. Try wearable health monitors instead”, Concentrates, posted 31 July, 2017
4. H. Fahad , H. Shiraki, M. Amani, C. Zhang, V. Hebbar, W. Gao, H. Ota, M. Hettick, D. Kiriya, Y. -Z, Chen, Y. -L. Chueh, A. Javey, “Room temperature multiplexed gas sensing using chemical-sensitive 3.5-nm-thin silicon transistors.“, Science Advances, e1602557, 3(3), 2017. ・Highlighted in “Nanochip Gas Sensors Promise Personal Air Quality Monitors in Our Pockets.”, IEEE Spectrum, posted 24 Mar, 2017

2016

1. W. Gao, H. Y. Y. Nyein, Z. Shahpar, L.-C. Tai, E. Wu, M. Bariya, H. Ota, H. M. Fahad, K. Chen, A. Javey. “Wearable Sweat Biosensors“, IEEE IEDM Technical Digest, 6.6.1-6.6.2, 2016.
2. W. Gao, S. Emaminejad, H. Y. Y. Nyein, S. Challa, K. Chen, A. Peck, H. Fahad, H. Ota, S. Hiroshi, D. Kiriya, D. H, Lien, G. A. Brooks, R. W. Davis, A. Javey, “Fully-integrated wearable sensor arrays for multiplexed in-situ perspiration analysis.”, Nature, 529, 509-514, 2016. ・Highlighted in “What Your Sweat Reveals About Your Health”, Time, Jan. 27, 2016 etc.
3. H. Ota, S. Emaminejad, Y. Gao, A. Zhao, E. Wu, S. Challa, K. Chen, H. M. Fahad, A. K. Jha, D. Kiriya, W. Gao, H. Shiraki, K. Morioka, A. R. Fergson, K. E. Healy, R. W. Davis, A. Javey, “Application of 3D printing for smart objects with embedded electronic sensors and systems.” Advanced Materials Technologies, 1-8, 1(1), 2016. ・Selected as the front cover art of the first issue of Advanced Materials Techonologies
4. J. Bullock, M. Hettick, J. Geissbuhler, A. J. Ong, T. Allen, C. M. Sutter-Fella, T. Chen, H. Ota, E. W. Schaler, S. De Wolf, C. Ballif, A. Cuevas, A. Javey, “Efficient silicon solar cells with dopant-free asymmetric heterocontacts.” Nature Energy, 15031, 2016.
5. K. Chen, W. Gao, S. Emaminejad, D. Kiriya, H. Ota, H. Y. Y. Nyein, K. Takei, A. Javey, “Printed Carbon Nanotube Electronics and Sensor Systems.” Advanced Materials, 28(22) 2016. ・Selected as the frontpiece art Advanced Materials
6. H. Y. Y. Nyein, W. Gao, Z. Shahpar, S. Emaminejad, S. Challa, K. Chen, H. M. Fahad, L.-C. Tai, H. Ota, R. W. Davis, A. Javey, “A Wearable Electrochemical Platform for Non-Invasive Simultaneous Monitoring of Ca2+and pH“, ACS Nano, 10, 7216-24, 2016.
7. W. Gao, H. Y. Y. Nyein, Z. Shahpar, H. M. Fahad, K. Chen, S. Emaminejad, Y. Gao, L. -C. Tai, H. Ota, E. Wu, J. Bullock, Y. Zeng, D. H. Lien, A. Javey, “Wearable Microsensor Array for Multiplexed Heavy Metal Monitoring of Body Fluid”, ACS Sensors, 1, 866-74, 2016. ・Selected as the cover art ACS Sensors

2015

1. D. W. Haldane, C. Casarez, J. Karras, J. Lee, C. Li, A. O. Pullin, E. W. Schaler, D. Yun, H. Ota, A. Javey, and R. S. Fearing,: “Integrated Manufacture of Exoskeletons and Sensing Structures for Folded Millirobots.”, Journal of Mechanisms and Robotics, 7(2), 021011-021036, 2015. ・Highlighted in “Armored Exoskeletons Help Roachbots Go Anywhere, Handle Anything.”, IEEE Spectrum, posted 29 Jun, 2015

2014

1. H. Ota, K. Chen, Y. Lin, H. Shiraki, D. Kiriya, Z. Yu, T.-J. Ha, and A. Javey,: “Highly-deformable liquid-state heterojunction sensors.”, Nature Communications, 5(5032), pp. 1-9, 2014. ・Highlighted in “Fluid-based sensor bends and twists“, Nature, 514 (7521), pp. 142, 2014 ・Highlighted in “Highly Sensitive Flexible Sensors Made From Novel Liquid Heterojunctions And Circuits.”, Neomatica, 2014 ・Highlighted in “Fluid-based sensor bends and twists”, Scientific American, 3(41), pp. 2, 2014
2. N. Tanaka, H. Ota, K. Fukumori, J. Miyake, M. Yamato, and T. Okano,: “Micro-patterned cell-sheets fabricated with stamping-force-controlled micro-contact printing.”, Biomaterials, 35(37), pp. 9802-9810, 2014.
3. K. Sekine, Y. Kagawa, E. Maeyama, H. Ota, Y. Haraguchi, K. Matsuura, and T. Shimizu,: “Oxygen consumption of human heart cells in monolayer culture.”, Biochemical and Biophysical Research Communications (B. B. R. C.), 452 (3), pp. 834-839, 2014.
4. D. Kiriya, K. Chen, H. Ota, Y. Lin, P. Zhao, Z. Yu, T.-J. Ha, and A. Javey,: “Design of Surfactant Substrate Interactions for Roll-to-Roll Assembly of Carbon Nanotubes for Thin-Film Transistors.”, Journal of the American Chemical Society (J. A. C. S.), 136 (31), pp. 11188-11194, 2014.
5. K. Takei, Z. Yu, M. Zheng, H. Ota, T. Takahashi, and A. Javey,: “Highly-sensitive electronic-whiskers based on patterned carbon nanotube and silver nanoparticle composite films.”, Proceedings of the National Academy of Sciences (P. N. A. S.), 111(5), pp. 1703-1707, 2014. ・Highlighted in “E-Whiskers Have Arrived to Fulfill All Your Robot Cat Dreams.”, Popular Mechanics, 2014 ・Highlighted in “E-whiskers: Berkeley Researchers Develop Highly Sensitive Tactile Sensors for Robotics and Other applications“, Lawrence Berkeley National Laboratory news, 2014

2013

1. H. Ota, N. Miki,: “Microtechnology-based three-dimensional spheroid formation.” Frontiers in Bioscience, E5, pp. 37-48, 2013.

2011

1. H. Ota, K. Taiga, and N. Miki,: “Rapid formation of size-controlled three dimensional hetero-cell aggregates using micro-rotation flow for spheroid study.”, Biomicrofluidics, 5(3), pp. 34105-3410515, 2011.
2. H. Ota, N. Miki,: “Microfluidic experimental platform for producing size-controlled three-dimensional spheroids.”, Sensors and Actuators A, 169(2), pp. 266-273, 2011.

～2010

1. H. Ota, N. Miki,: “Parallel formation of three-dimensional spheroid using micro-rotational flow.”, Journal of Robotics and Mechatronics, 22 (5), pp. 587-593, 2010.
2. H. Ota, R. Yamamoto, K. Deguchi, Y. Tanaka, Y. Kazoe, Y. Sato, and N. Miki,: “Three-dimensional spheroid forming lab-on-a-chip using micro-rotational flow.”, Sensors and Actuators B, 147(1), pp. 359-365, 2010.
3. H. Ota, M. Matsumura, N. Miki, and H. Minamitani,: “Photochemically induced increase in endothelial permeablity regulated by RhoA activation.”, Photochemical & Photobiological Sciences, 8 (10), pp. 1401-1407, 2009.
4. 南谷晴之，太田裕貴，中楯浩康，小俵麻里子，関塚永一，大塩力：光化学反応刺激による内皮細胞と血小板および白血球接着に対するイブジラストの作用の検討，血栓止血学会学会誌，19(1), pp. 129-139・2008
5. 太田裕貴，松村実美子，南谷晴之：光化学反応負荷による血管透過性亢進に関する基礎的研究，電気学会論文誌 C ，127(10) ・p1522-1528・2007

Awards

1. H. Ota, K. Matsubara, Finalist of Best Conference Paper Award, Stretchable Helical Wiring with Liquid Metal, IEEE NANO 2019, 2019
2. H. Ota, Y. Isoda, G. Inamori, Best paper award, “Patch-type Wireless Forehead Vital Sensing Device.”, 2018 IEEE International Symposium on Micro-NanoMechatronics and Human Science (MHS2018), 2018
3. H. Ota, Best Oral Paper Award, “Microfluidic Environmental Sensors Using Liquid Metal for Wearable Applications.”, IEEE NEMS 2018, 2018