Papers
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About
Dr. Reiji Kumai is a leading figure in the field of stimuli-responsive molecular crystals, with a particular focus on mechanically adaptive materials. His most celebrated work demonstrates a groundbreaking achievement in azobenzene single crystals, where he engineered an abrupt and reversible stretching of over 8% along the crystal's long axis during a thermal phase transition. This discovery, published in 2025 and already garnering 2 citations, represents a significant leap forward for the development of high-durability actuators and microrobotics. By overcoming the long-standing challenge of achieving large, reversible deformation in single-component crystalline systems, Kumai has opened new pathways for designing molecular machines that respond predictably to external stimuli. His research elegantly bridges fundamental solid-state chemistry with practical engineering, offering a robust platform for next-generation smart materials. For students and researchers, Kumai's work exemplifies how precise molecular design can yield macroscopic mechanical responses, making him a pivotal contributor to the growing field of crystal engineering and soft robotics.
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