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Showing 1–8 of 8 results
Advanced filters: Author: Ryota Katsumi Clear advanced filters

  • One of technological challenges building organic electronics is efficient injection of electrons at metal-semiconductor interfaces compared to that of holes. The authors show an air-stable electrode design with induced gap states, which support Fermi level pinning and thus ambipolar carrier injection.

    • Thangavel Kanagasekaran
    • Hidekazu Shimotani
    • Katsumi Tanigaki
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-7

  • Wnt5a is a member of the Wnt family of proteins that mainly activates the noncanonical Wnt signaling pathway. Here, the authors discover that inflammatory fibroblasts expressing Wnt5a, which are induced by hypoxia, contribute to colon cancer progression.

    • Akikazu Harada
    • Yoshiaki Yasumizu
    • Akira Kikuchi
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-24

  • A total of 1074 patients with a history of ischemic stroke enrolled in The Recurrent Stroke Prevention Clinical Outcome (RESPECT) Study were assigned to intensive blood pressure (BP) control group (blood pressure < 120/80 mmHg) or standard blood pressure control group (blood pressure < 140/90 mmHg) and were followed up for a mean of 3.9 years. Seventy-eight first recurrent strokes occurred, including 70 ischemic stroke and 8 intracerebral hemorrhage. Intensive treatment did not change annual risk of ischemic stroke (1.74% vs. 1.75%, P = 0.999), but markedly reduced risk of hemorrhagic stroke (0.00% vs. 0.39%, P = 0.005). Beneficial effect of intensive BP control were observed for risk of hemorrhagic stroke in the patients with a history of ischemic stroke.

    • Kazuo Kitagawa
    • Hisatomi Arima
    • Seigo Nakada
    Research
    Hypertension Research
    Volume: 45, P: 591-601

  • Nitrogen-vacancy centers are promising in quantum magnetometers for nanoscale phenomena and sensitive field detection, but achieving simultaneous high spatial resolution and high field sensitivity is challenging. Here, nanoscale quantum sensing with high field sensitivity by on-chip diamond micro-ring resonators is demonstrated.

    • Ryota Katsumi
    • Kosuke Takada
    • Takashi Yatsui
    ResearchOpen Access
    Communications Materials
    Volume: 6, P: 1-8

  • For most lasing and photonic applications, it is essential to control the number of lasing modes that are present. In this work, an interface between two topologically distinct photonic crystals is used to ensure single-mode lasing with enhanced light-matter interactions due to a near-diffraction-limited mode volume.

    • Yasutomo Ota
    • Ryota Katsumi
    • Yasuhiko Arakawa
    ResearchOpen Access
    Communications Physics
    Volume: 1, P: 1-8

  • Nitrogen-vacancy centers in diamond have emerged as powerful tools for a broad range of quantum technologies. This review discusses recent progress and challenges in the hybrid integration of diamond color centers on cutting-edge photonic platforms.

    • Ryota Katsumi
    • Kosuke Takada
    • Takashi Yatsui
    ReviewsOpen Access
    Communications Engineering
    Volume: 4, P: 1-19