• Efficient Collection of Oil Microdroplets by Hyperbranched, Space-Filling Open Microfluidic Channels.

    Yusho Segawa, Kentaro Kinoshita, Hiroyuki Kai*

    Advanced Materials Interfaces, 2300340 (2023)

  • Wettability Patternable Hybrid Polymer Films Based on TiO2 and Fluorinated Polymer for Bioelectronics Applications.

    Shunsuke Yamamoto*, Hiroyuki Kai

    Advanced Materials Interfaces, 2201736 (2022)

  • A porous microneedle electrochemical glucose sensor fabricated on a scaffold of a polymer monolith.

    Hiroyuki Kai*, Akichika Kumatani

    Journal of Physics: Energy, 3, 024006 (2021)

  • Organic Electrochromic Timer for Enzymatic Skin Patches.

    Hiroyuki Kai, Wataru Suda, Shotaro Yoshida, Matsuhiko Nishizawa*

    Biosensors and Bioelectronics, 123, 108-113 (2019)

  • Fluid-permeable enzymatic lactate sensors for micro-volume specimen.

    Hiroyuki Kai*, Yuto Kato, Ryoma Toyosato, Matsuhiko Nishizawa*

    Analyst, 143, 5545-5551 (2018)

  • Space-filling open microfluidic channels designed to collect water droplets.

    Hiroyuki Kai*, Ryoma Toyosato, Matsuhiko Nishizawa*

    RSC Advances, 8, 15985-15990 (2018)

  • Contractile Skeletal Muscle Cells Cultured with a Conducting Soft Wire for Effective, Selective Stimulation.

    Kuniaki Nagamine, Hirotaka Sato, Hiroyuki Kai, Hirokazu Kaji, Makoto Kanzaki, Matsuhiko Nishizawa*

    Scientific Reports, 8, 2253 (2018)

  • Design and Experimental Verification of a 0.19 v 53 μw 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and an Inductive-Coupling Transmitter for a Self-Powered Bio-sensing System Using a Biofuel Cell.

    Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Hiroyuki Kai, Matsuhiko Nishizawa, Kazuo Nakazato, Kiichi Niitsu

    IEEE Transactions on Biomedical Circuits and Systems, 11, 1313 (2017)

  • Accelerated wound healing on skin by electrical stimulation with a bioelectric plaster.

    Hiroyuki Kai, Takeshi Yamauchi, Yudai Ogawa, Ayaka Tsubota, Takahiro Magome, Takeo Miyake, Kenshi Yamasaki, Matsuhiko Nishizawa*

    Advanced Healthcare Materials, 6, 1700465 (2017)

  • An Array of Porous Microneedles for Transdermal Monitoring of Intercellular Swelling.

    Kuniaki Nagamine, Jun Kubota, Hiroyuki Kai, Yoshinobu Ono, Matsuhiko Nishizawa*

    Biomedical Microdevices, 19, 68 (2017)

  • Microfluidic co-cultures of retinal pigment epithelial cells and vascular endothelial cells to investigate choroidal angiogenesis.

    Li-Jiun Chen, Shuntaro Ito, Hiroyuki Kai, Kuniaki Nagamine, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji*

    Scientific Reports, 7, 3538 (2017)

  • Intrinsically Stretchable Electrochromic Display by a Composite Film of Poly(3,4­-ethylenedioxythiophene) and Polyurethane.

    Hiroyuki Kai*, Wataru Suda, Yudai Ogawa, Kuniaki Nagamine, Matsuhiko Nishizawa*

    ACS Applied Materials & Interfaces, 9, 19513 (2017)

  • Totally shape-conformable electrode/hydrogel composite for on-skin electrophysiological measurements.

    Kuniaki Nagamine, Shun Chihara, Hiroyuki Kai, Hirokazu Kaji, Matsuhiko Nishizawa*

    Sensors and Actuators B: Chemical, 237, 49-53 (2016)

  • Minimally-invasive transepidermal potentiometry with microneedle salt bridge.

    Yuina Abe, Kuniaki Nagamine, Mayu Nakabayashi, Hiroyuki Kai, Hirokazu Kaji, Takeshi Yamauchi, Kenshi Yamasaki, Matsuhiko Nishizawa*

    Biomedical Microdevices, 18, 55 (2016)

  • Porous polymer microneedles with interconnecting microchannels for rapid fluid transport.

    Liming Liu, Hiroyuki Kai*, Kuniaki Nagamine, Yudai Ogawa, Matsuhiko Nishizawa*

    RSC Advances, 6, 48630-48635 (2016)

  • Negative membrane curvature catalyzes nucleation of endosomal sorting complex required for transport (ESCRT)-III assembly.

    Il-Hyung Lee, Hiroyuki Kai, Lars-Anders Carlson, Jay T. Groves, James H. Hurley*

    PNAS, 112, 15892-15897 (2015)

  • Stretchable biofuel cell with enzyme-modified conductive textiles.

    Yudai Ogawa, Yuki Takai, Yuto Kato, Hiroyuki Kai, Takeo Miyake, Matsuhiko Nishizawa*

    Biosensors and Bioelectronics, 74, 947-952 (2015)

  • Highly Stretchable Cell-Cultured Hydrogel Sheet.

    Kuniaki Nagamine, Yuina Abe, Hiroyuki Kai, Hirokazu Kaji, Matsuhiko Nishizawa*

    RSC Advances, 5, 66334-66338 (2015)

  • Spatial organization of EphA2 at the cell-cell interface modulates trans-endocytosis of ephrinA1.

    Adrienne C Greene‡, Samuel J Lord‡, Aiwei Tian, Christopher Rhodes, Hiroyuki Kai, Jay T Groves*

    Biophysical Journal, 106, 2196-205 (2014)

  • Size-based chromatography of signaling clusters in a living cell membrane.

    Niña G Caculitan‡, Hiroyuki Kai‡, Eulanca Y Liu‡, Nicole Fay, Yan Yu, Theobald Lohmüller, Geoff P O'Donoghue, Jay T Groves*

    Nano Letters, 14, 2293-8 (2014)

  • Self-assembling siloxane nanoparticles with three phases that increase tenacity of poly L-lactic acid.

    Masatoshi Iji*, Naoki Morishita, Hiroyuki Kai

    Polymer Journal, 43, 101-104 (2011)

  • Toward long-distance mechanical communication: studies on a ternary complex interconnected by a bridging rotary module.

    Hiroyuki Kai, Shinji Nara, Kazushi Kinbara*, Takuzo Aida*

    J. Am. Chem. Soc., 130, 6725-7 (2008)