研究者詳細 - 谷口　博基

論文 - 谷口　博基

分割表示 307 件中 1 - 20 件目／全件表示 >>

Unconventional Polarization Response in Titanite-Type Oxides due to Hashed Antiferroelectric Domains 査読有り

Hiroki Taniguchi, Takumi Watanabe, Taro Kuwano, Akitoshi Nakano, Yukio Sato, Manabu Hagiwara, Hiroko Yokota, Kazuhiko Deguchi

ACS nano 18 巻 ( 22 ) 頁： 14523 - 14531 2024年5月

Cu Doping Effects on Magnetic Properties of Ba3ZnRu2O9 査読有り

Kimura A., Yasui Y., Nakano A., Taniguchi H., Terasaki I.

Journal of the Physical Society of Japan 94 巻 ( 3 ) 2025年3月

局所構造制御による誘電体の物性デザイン招待有り査読有り

谷口博基

日本結晶学会誌 67 巻 ( 1 ) 頁： 30 - 37 2025年2月

Biosensor Application of CMOS Inverter and Ring Oscillator with Organic Field-Effect Transistors 査読有り

Utsumi M., Fujiwara A., Goto H., Okamoto H., Takeyasu N., Saitoh Y., Suga M., Takahashi Y., Imanaka H., Taniguchi H., Yasui S., Eguchi R., Kubozono Y.

ACS Applied Electronic Materials 7 巻 ( 4 ) 頁： 1483 - 1492 2025年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ACS Applied Electronic Materials

Organic field-effect transistors (FETs) were fabricated for use in a biosensor that detects urea hydrolysis under urease. Here, a 60 nm thick 2,6-diphenylanthracene (DPA) thin film was used to prepare a p-channel FET that effectively detected this enzymatic reaction. The absolute drain current, |ID|, of the transfer curve rapidly increased at any gate voltage, VG, when a droplet of 0.1 M phosphate buffer solution (pH = 6.7 at 25 °C) containing 25 mM urea and 49 nM urease was placed on a different gate electrode (i.e., sensor electrode) than the VG electrode. Thus, urea hydrolysis directly affected the value of VG, enhancing |ID|. The usage of high-k gate dielectric ZrO2 in the FET device caused the absolute value of VG, |VG|, to decrease by ≈1.0 V in the transfer curve. The value of |ID| at any absolute drain voltage |VD| and |VG| was plotted as a function of time and urea concentration [S], showing a rapid increase and reaching saturation within ≈1.0 min or up to [S] = 250 mM. Furthermore, we prepared the complementary metal oxide semiconductor (CMOS) inverter with thin films of DPA as a p-channel and N,N′-di-n-octyl-3,4,9,10-perylenetetracarboxylic diimide (PTCDI-C8) as an n-channel to detect urea hydrolysis. The logic threshold voltage VTIC in the CMOS inverter increased by placing a droplet containing urea and urease on a different gate electrode than that delivering the input voltage Vin. Finally, a ring oscillator consisting of five CMOS inverters was fabricated to detect the variation in oscillation frequency throughout the reaction, revealing an unambiguous decrease in the frequency. The successful detection of urea hydrolysis is the first step toward the realization of a practical biosensor incorporating a CMOS inverter and ring oscillator.

DOI： 10.1021/acsaelm.4c02031

Scopus

Titanite-type solid solutions (Ca,Pb)TiGeO5: a competition between triclinic and antiferroelectric distortions 査読有り

Zerui Li, Taro Kuwano, Akitoshi Nakano, Manabu Hagiwara, Shintaro Yasui, Hiroki Taniguchi, Hiroko Yokota

Journal of the Ceramic Society of Japan advpub 巻 ( 0 ) 2025年

Theoretical and data-driven approaches to semiconductors and dielectrics: from prediction to experiment 査読有り Open Access

Oba F., Nagai T., Katsube R., Mochizuki Y., Tsuji M., Deffrennes G., Hanzawa K., Nakano A., Takahashi A., Terayama K., Tamura R., Hiramatsu H., Nose Y., Taniguchi H.

Science and Technology of Advanced Materials 25 巻 ( 1 ) 頁： 2423600 2024年12月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Science and Technology of Advanced Materials

Computational approaches using theoretical calculations and data scientific methods have become increasingly important in materials science and technology, with the development of relevant methodologies and algorithms, the availability of large materials data, and the enhancement of computer performance. As reviewed herein, we have developed computational methods for the design and prediction of inorganic materials with a particular focus on the exploration of semiconductors and dielectrics. High-throughput first-principles calculations are used to systematically and accurately predict the local atomic and electronic structures of polarons, point defects, surfaces, and interfaces, as well as bulk fundamental properties. Machine learning techniques are utilized to efficiently predict various material properties, construct phase diagrams, and search for materials satisfying target properties. These computational approaches have elucidated the mechanisms behind material functionalities and explored promising materials in combination with synthesis, characterization, and device fabrication. Examples include the development of ternary nitride semiconductors for potential optoelectronic and photovoltaic applications, the exploration of phosphide semiconductors and the optimization of heterointerfaces toward the improvement of phosphide-based photovoltaic cells, and the discovery of ferroelectricity in layered perovskite oxides and the theoretical understanding of its origin, all of which demonstrate the effectiveness of our computer-aided materials research.

DOI： 10.1080/14686996.2024.2423600

Open Access

Scopus

High dielectric breakdown strength of antipolar CaTiGeO5 ceramics sintered at optimized temperature 査読有り Open Access

50 巻 ( 18 ) 頁： 34197 - 34204 2024年9月

Effect of Al–Nb codoping on dielectric properties and breakdown strength of rutile TiO2 ceramics 査読有り

Mitsuha Kawasaki, Taro Kuwano, Hiroki Taniguchi, Shinobu Fujihara, Manabu Hagiwara

Journal of the Ceramic Society of Japan 132 巻 ( 7 ) 頁： 304 - 311 2024年7月

Ferroelectric polycrystalline Bi2SiO5 thin films on Pt-covered Si substrates prepared by pulsed laser deposition combined with post-annealing 査読有り

Haruto Takahashi, Shingo Maruyama, Hiroshi Naganuma, Hiroki Taniguchi, Ryota Takahashi, Shintaro Yasui, Kenichi Kaminaga, Yuji Matsumoto

Journal of Alloys and Compounds 988 巻 ( 15 ) 頁： 174195 2024年6月

Antiferroelectricity of titanite-type oxide SrTiGeO5 and its potential for power electronics applications 査読有り

Toshiya Uohashi, Taro Kuwano, Manabu Hagiwara, Kenji Natori, Kazuhiko Deguchi, Hiroki Taniguchi

Applied Physics Letters 124 巻 ( 18 ) 頁： 182901 2024年4月

Re-estimation of Maxwell-Wagner relaxation for novel absorbers via (Ta+Ga)-doped rutile-type TiO2 ceramics with various valence proportions and sintering temperatures 査読有り

T. Kuwano, Y. Hashimoto, K. Deguchi, H. Taniguchi

Journal of Alloys and Compounds 966 巻 2023年12月

Dielectric Materials with Hyperordered Structures 査読有り

Hiroki Taniguchi

Hyperordered Structures in Materials: Disorder in Order and Order within Disorder 頁： 313 - 331 2023年10月

Direct microwave energy input on a single cation for outstanding selective catalysis 査読有り

F. Kishimoto, T. Yoshioka, R. Ishibashi, H. Yamada, K. Muraoka, H. Taniguchi, T. Wakihara, K. Takanabe

Science advances 9 巻 ( 33 ) 2023年8月

Structural origins of the unusual thermal stability of amorphous CuxGe50-xTe50 (0 ≤ x ≤ 33.3) 査読有り国際共著

J.R. Stellhorn, B. Paulus, B.D. Klee, M. Inui, H. Taniguchi, Y. Sutou, S. Hosokawa, W.C. Pilgrim

Journal of Physics Condensed Matter 35 巻 ( 30 ) 2023年8月

Temperature-Stable Linear Dielectric Response of Low-Temperature Sintered La-Doped Bi2SiO5 Ceramics 査読有り

Y. Yasumoto, T. Kuwano, H. Taniguchi, S. Fujihara, M. Hagiwara

ACS Applied Electronic Materials 5 巻 ( 8 ) 頁： 4323 - 4329 2023年7月

Ferroelectricity in oxygen-deficient perovskite-type oxide Sr10Ga6Sc4O25 査読有り

A. Nakano, I. Terasaki, H. Taniguchi

Journal of Materials Chemistry C 11 巻 ( 25 ) 頁： 8541 - 8546 2023年6月

Ferroelectric Ionic Molecular Crystals with Significant Plasticity and a Low Melting Point: High Performance in Hot-Pressed Polycrystalline Plates and Melt-Grown Crystalline Sheets 査読有り

J. Harada, H. Takahashi, R. Notsuka, M. Takehisa, Y. Takahashi, T. Usui, H. Taniguchi

Angewandte Chemie - International Edition 62 巻 ( 3 ) 頁： e202215286 2023年1月

エマージェント物性を生みだす超秩序構造の創出ー特に誘電体材料に関してー査読有り

谷口博基

セラミックス 58 巻頁： 505 - 508 2023年

Controlling dielectric properties of Nb + X (X = Al, Ga, In) co-doped and Nb-doped rutile-type TiO2 single crystals 査読有り

S. Kakimoto, Y. Hashimoto, T. Kuwano, K. Kimura, K. Hayashi, M. Hagiwara, K. Deguchi, H. Taniguchi

Journal of Materials Chemistry C 11 巻 ( 4 ) 頁： 1304 - 1310 2022年12月

Hyper-Ordered Structures in Dielectric Materials 査読有り国際共著

M. Deluca, H. Taniguchi

Journal of the Physical Society of Japan 91 巻 ( 9 ) 頁： 091001 2022年9月

　前のページ - 次のページ　

<谷口 博基>

論文 - 谷口 博基

<谷口　博基>

論文 - 谷口　博基