研究者詳細 - 小林　亮

論文 - 小林　亮

分割表示 127 件中 41 - 60 件目／全件表示 >>

Synthesis, Structure, and Photoluminescence of a Novel Oxynitride BaYSi₂O₅N Activated by Eu²⁺ and Ce³⁺ 査読有り国際誌

Makoto Kobayashi, Takuya Yasunaga, Hironori Sato, Hideki Kato, Kotaro Fujii, Masatomo Yashima, Masato Kakihana

Chemistry Letters 46 巻 ( 6 ) 頁： 795 - 797 2017年6月

Site occupancy and luminescence properties of Ca₃Ln(AlO)₃(BO₃)₄:Ce³⁺,Tb³⁺,Mn²⁺ (Ln = Y, Gd) 査読有り国際誌

Wen Dawei, Kato Hideki, Kobayashi Makoto, Yamamoto Shunsuke, Mitsuishi Masaya, Kakihana Masato

Journal of Materials Chemistry C 5 巻 ( 18 ) 頁： 4578 - 4583 2017年5月

Investigation of the Up-conversion Properties of Er-Yb-doped Calcium Tantalates with Various Ca/Ta Ratios 査読有り国際誌

Tamura Sayaka, Iwaoka Michio, Sato Yasushi, Kobayashi Makoto, Kakihana Masato, Tomita Koji

Journal of Photopolymer Science and Technology 30 巻 ( 4 ) 頁： 507 - 512 2017年

記述言語：英語掲載種別：研究論文（学術雑誌）

Er3+/Yb3+ co-doped calcium tantalate up-conversion (UC) phosphors were synthesized via a parallel synthesis scheme using the gelable citrate complex method. Samples with various Ca/Ta atomic ratios were prepared, and their UC emission properties were compared. Under 980-nm near-infrared laser excitation, α-Ca2Ta2O7 : Er3+, Yb3+ showed an extremely weak UC emission intensity and CaTa4O11 : Er3+, Yb3+ demonstrated an excellent UC emission intensity. In addition, the local symmetry around the rare-earth dopant ions affected the UC luminescence properties.

DOI： 10.2494/photopolymer.30.507

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真空加圧焼成炉を利用した新規酸窒化物蛍光体の探索招待有り

加藤英樹, 佐藤大典, 安永拓矢, 小林亮, 垣花眞人, 磯部史佳

島津評論 73 巻 ( 3・4 ) 頁： 129-135 2016年12月

Synthesis and Development of Titania with Controlled Structures 招待有り査読有り

Makoto Kobayashi

Journal of the Ceramic Society of Japan 124 巻 ( 9 ) 頁： 863-869 2016年9月

Screening of Er³⁺/Yb³⁺ Co-doped RE-Ta-O and RE-Nb-O (RE = Y, La, or Gd) Up-conversion Phosphors 査読有り国際誌

Sayaka Tamura, Michio Iwaoka, Yasushi Sato, Makoto Kobayashi, Masato Kakihana, Koji Tomita

Chemistry Letters 45 巻 ( 8 ) 頁： 890 - 891 2016年8月

Anomalous Orange Light Emitting (Sr,Ba)₂SiO₄:Eu²⁺ Phosphors for Warm White LEDs 査読有り国際誌

Dawei Wen, Hiroki Kuwahara, Hideki Kato, Makoto Kobayashi, Yasushi Sato, Takaki Masaki, Masato Kakihana

ACS Applied Materials & Interfaces 8 巻 ( 18 ) 頁： 11615 - 20 2016年5月

Anisotropy in Conformation and Dynamics of a Glycolate Ion Near the Surface of a TiO₂ Rutile Crystal Between Its {001} and {110} Planes: A Molecular Dynamics Study 査読有り国際誌

Hiroki Nada, Makoto Kobayashi, Masato Kakihana

Journal of Physical Chemistry C 120 巻 ( 12 ) 頁： 6502 - 6514 2016年3月

Effect of Site Occupancy on Deep-red Emission from Eu²⁺-activated Ca₂SiO₄ Phosphor 査読有り国際誌

Hiroki Kuwahara, Yasushi Sato, Hideki Kato, Makoto Kobayashi, Takaki Masaki, Masato Kakihana

Chemistry Letters 45 巻 ( 3 ) 頁： 321 - 323 2016年3月

Self-assembly of polyethyleneamine-intercalated H₂Ti₂O₅ nanoparticles into spherical agglomerates 査読有り国際誌

Kobayashi Makoto, Kato Hideki, Kakihana Masato

Journal of Materials Research 31 巻 ( 5 ) 頁： 564 - 572 2016年3月

水熱法によるバリウムタンタレートナノシート光触媒の合成とその水分解活性査読有り

高杉壮一, 冨田恒之, 岩岡道夫, 小林亮, 加藤英樹, 垣花眞人

Journal of the Society of Inorganic Materials, Japan 23 巻 ( 380 ) 頁： 25-29 2016年

酸化チタン多形の水熱結晶成長(<特集>水が関係する結晶成長のトピックス) 招待有り査読有り国際誌

小林亮, 加藤英樹, 垣花眞人

日本結晶成長学会誌 42 巻 ( 4 ) 頁： 283-289 2016年

記述言語：日本語掲載種別：研究論文（学術雑誌）

Control of crystal growth is rather important in the field of materials, because the shape directly affects their functional abilities. Our research group engages in hydrothermal synthesis of titanium dioxide, which is regarded as one of the representative ceramics, using water-soluble titanium complexes. The high chemical stability and peculiar molecule structures of these titanium complexes allowed us to use various compounds which play a role in control of crystal growth, resulting in the selective synthesis of four titanium dioxide polymorphs, that is, rutile, anatase, brookite and TiO_2(B), with a controlled shape. This paper summarizes our past study and reported researches on synthesis of titania polymorph crystals by classification of zero-, one-, two-, and three-dimensional structures.

DOI： 10.19009/jjacg.42.4_283

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水熱法によるバリウムタンタレートナノシート光触媒の合成とその水分解活性査読有り国際誌

高杉壮一, 冨田恒之, 岩岡道夫, 小林亮, 加藤英樹, 垣花眞人

Journal of the Society of Inorganic Materials, Japan 23 巻 ( 380 ) 頁： 25-29 2016年

Graphene/M_xWO₃ (M = Na, K) nanohybrids with excellent electrical properties 査読有り国際誌

Bin Liu, Shu Yin, Xiaoyong Wu, Yuhua Wang, Yunfang Huang, Jihuai Wu, Tohru Sekino, Junichi Matsushita, Soo Wohn Lee, Makoto Kobayashi, Masato Kakihana, Tsugio Sato

Carbon 94 巻頁： 309 - 316 2015年11月

Large Redshifts in Emission and Excitation from Eu²⁺-Activated Sr₂SiO₄ and Ba₂SiO₄ Phosphors Induced by Controlling Eu²⁺ Occupancy on the Basis on Crystal-Site-Engineering 査読有り国際誌

Yasushi Sato, Hiroki Kuwahara, Hideki Kato, Makoto Kobayashi, Takaki Masaki, Masato Kakihana

Optics and Photonics Journal 5 巻 ( 11 ) 頁： 326-333 2015年11月

Photoluminescence Properties of Mn⁴+-activated Perovskite-type Titanates, La₂MTiO₆:Mn⁴⁺ (M = Mg and Zn) 査読有り国際誌

Yohei Takeda, Hideki Kato, Makoto Kobayashi, Hisayoshi Kobayashi, Masato Kakihana

Chemistry Letters 44 巻 ( 11 ) 頁： 1541 - 1543 2015年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

It has been found that Mn4+-activated La2MTiO6 (M = Mg and Zn) functions as novel Eu-free phosphors for red emission in this work. La2MTiO6:Mn4+ exhibited emission with a peak at 710 nm under excitation by ultraviolet to blue light (300–550 nm). La2MgTiO6:Mn4+ exhibited stronger emission than La2ZnTiO6:Mn4+. The internal quantum yield of La2MgTiO6:Mn4+ was 58.7% under the excitation at 330 nm.

DOI： 10.1246/cl.150748

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A Facile One-Step Solvothermal Synthesis and Electrical Properties of Reduced Graphene Oxide/Rod-Shaped Potassium Tungsten Bronze Nanocomposite. 査読有り国際誌

Liu B, Yin S, Wang Y, Guo C, Wu X, Dong Q, Kobayashi M, Kakihana M, Sato T

Journal of Nanoscience and Nanotechnology 15 巻 ( 9 ) 頁： 7305 - 10 2015年9月

Synthesis of picolinate-iron(III) compounds through an aqueous solution process 査読有り国際誌

Sato Junki, Kobayashi Makoto, Kato Hideki, Kwon Eunsang, Kakihana Masato

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 123 巻 ( 1441 ) 頁： 751 - 755 2015年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

A novel picolinate-iron(III) compound, Fe(C6H4NO2)2(OH) (1), was synthesized from an aqueous solution of a picolinate-iron(II) complex. Compound 1 was obtained by a thermal treatment of the picolinate-iron complex aqueous solution, whose pH was adjusted to 3–7, containing more than twice molar picolinic acid (Hpa) to Fe at 353 K for 72 h. When the iron aqueous solution in the presence of more than six times molar Hpa to Fe at pH 2–5 was heated, Fe(C6H4NO2)3·H2O (2) appeared. Millimeter-sized yellow-green single crystals of 2 could be obtained by the heat treatment of the picolinate-iron aqueous solution, whose pH was adjusted to 3, with Fe2+:Hpa = 1:10 at 373 K for 72 h. Formation mechanism of 1 and 2 was also discussed through investigations of relationship between synthesis conditions and products. Our approach opens a promising new route for preparation of precursors for synthesis of high functional ceramics and development of new organic–inorganic hybrids.

DOI： 10.2109/jcersj2.123.751

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Novel Titanium Complexes with a Reversible Structural Change on Solvent Adsorption and Desorption 査読有り国際誌

Makoto Kobayashi, Tatsuya Okuhara, Hideki Kato, Sota Sato, Masato Kakihana

Chemistry Letters 44 巻 ( 8 ) 頁： 1050 - 1052 2015年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

Two novel pyrazine-2-carboxylate titanium complexes were synthesized from an aqueous solution (1) and 1 in N,N-dimethylformamide (DMF) (2). The structure of 2 was determined to be [Ti6O8(C4H3N2COO)8(C3H7NO)4]·4C3H7NO·H2O by single-crystal X-ray analysis. Both complexes exhibited solvent adsorption–desorption accompanying reversible structural change. 1 and 2 were compatible, and 1 was vital for the synthesis of 2. The degassed 1 showed gate adsorption property for water vapor.

DOI： 10.1246/cl.150393

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Discovery of Novel Delafossite-type Compounds Composed of Copper(I) Lithium Titanium with Photocatalytic Activity for H₂ Evolution under Visible Light 査読有り国際誌

Hideki Kato, Tsuyoshi Fujisawa, Makoto Kobayashi, Masato Kakihana

Chemistry Letters 44 巻 ( 7 ) 頁： 973 - 975 2015年7月

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