The University of Osaka · Engineering
Professor Takuya Matsumoto's research lab specializes in advanced functional materials and their applications in emerging technologies, with a focus on organic electrochemical devices, biomimetic tissue engineering, and quantum materials. The lab investigates stimuli-responsive materials such as sulfonated polyaniline for reservoir computing, develops 3D tissue models using mechanical strain to guide cell and matrix organization, and explores novel magnetic phenomena like nonreciprocal magnons in antiferromagnets. Their work bridges materials science, biophysics, and quantum physics, aiming to create smart materials for neuromorphic computing, regenerative medicine, and next-generation spintronics.
Figures are computed from collected data and may differ slightly.
A sulfonated polyaniline (SPAN) organic electrochemical network device (OEND) is fabricated using a simple drop-casting method on multiple Au electrodes for use in reservoir computing (RC). The SPAN network has humidity-dependent electrical properties. Under high humidity, the SPAN OEND exhibits mainly ionic conduction, including charging of an electric double layer and ionic diffusion. The nonlinearity and hysteresis of the current-voltage characteristics progressively increase with increasing
Techniques developed for the in vitro reproduction of three-dimensional (3D) biomimetic tissue will be valuable for investigating changes in cell function in tissues and for fabricating cell/matrix composites for applications in tissue engineering techniques. In this study, we show that the simple application of a continuous strain to a fibrin gel facilitates the development of fibril alignment and bundle-like structures in the fibrin gel in the direction of the applied strain. Myoblasts culture
We investigate a microscopic origin of nonreciprocal magnons that is distinct from the Dzyaloshinskii-Moriya interaction in a honeycomb antiferromagnet. The key ingredient is a symmetric anisotropic exchange interaction depending on the bond direction, which results in valley-type nonreciprocal magnon excitations under staggered antiferromagnetic ordering. Furthermore, we find that this type of nonreciprocal magnon exhibits a peculiar magnetic-field response; the nonreciprocal direction can be m
The epitaxial growth of a Bi2Sr2CuO6 (2201) thin film on a Bi2Sr2CaCu2O8 (2212) single crystal has been performed using computer-controlled laser molecular beam epitaxy. The surface of the 2212 single crystal used as the substrate is smooth and invariant under the growth condition at 640 °C in NO2 pressure of 1×10−5 mbar. The growth process of the 2201 film has been observed by in situ reflection high-energy electron diffraction (RHEED), and the layer-by-layer growth of the 2201 phase is confirm
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