Relatively easy production, large surface area (over 5x5mm2), stable phase transition
λ-Ti3O5 is the unique oxide material that shows a photo-induced phase transition by visible-light irradiation. It is expected for application for optical recording media such as CD, DVD, and BD because of its low environmental impact compared to conventional chalcogenide materials. However, the crystal size of λ-Ti3O5 is limited to nanometer scale because of its metastable nature. This invention enables λ-Ti3O5 thin films with large surface area (over 5x5mm) using pulsed-laser deposition (PLD) method with TiO2 as a raw material. In a conventional method, λ-Ti3O5 could not be fabricated directly on substrates and an intermediate seed layer was required so that the seed layer component diffuses into λ-Ti3O5, which hindered the phase transition. On the other hand, this invention can synthesize λ-Ti3O5 thin films directly on a substrate without the seed layer, and thus the λ-Ti3O5 thin films show a stable phase transition.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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