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About

Toru Asahi is a leading researcher in the field of mechanically responsive molecular crystals and photomechanical materials, with significant contributions to the emerging discipline of crystal-based soft robotics and actuation. His work explores how organic crystals can be engineered to exhibit remarkable macroscopic motions — including bending, twisting, vibration, and even locomotion — in response to light and heat stimuli. Asahi's most celebrated contribution, "Walking and rolling of crystals induced thermally by phase transition" (2018, 139 citations), demonstrated for the first time that chiral azobenzene crystals could achieve autonomous locomotion through reversible phase transitions, fundamentally expanding the mechanical repertoire of crystalline materials. Subsequent work on photothermal natural vibration (2023, 29 citations) revealed that high-speed actuation could be achieved through resonance phenomena, offering new pathways for versatile, fast-responding actuators. His research portfolio spans photoisomerization-driven crystals, crystal-polymer hybrid actuators, and broad-wavelength crystal oscillators, collectively advancing the design principles for next-generation light-fueled devices. With over 260 total citations, Asahi's work has meaningfully shaped understanding of how crystalline materials — long considered rigid and fragile — can serve as sophisticated, responsive components in soft robotic systems.