新規ナノ・固体クラスター高次物性と原子位置直接決定

1999 Fiscal Year Annual Research Report

• Project/Area Number: 11450250
• Research Category: Grant-in-Aid for Scientific Research (B)
• Research Institution: Osaka University
• Principal Investigator: 奥 健夫 大阪大学, 産業科学研究所, 助教授 (30221849)
• Co-Investigator(Kenkyū-buntansha): 井上 雅博 大阪大学, 産業科学研究所, 助手 (60291449) ; 菅沼 克昭 大阪大学, 産業科学研究所, 教授 (10154444)
• Keywords: フラーレン / クラスター / C / BN / 高分解能電子顕微鏡 / 原子配列 / 電子状態 / 第一原理計算

Research Abstract

炭素、ホウ素、窒素をベースとしたフラーレンは人と環境に優しく、金属。無機材料と組み合わせ新規ナノ構造を構築することにより高機能・多機能が期待されるため、フラーレン類ナノ構造 (C-B-N ナノカプセル・チューブ・クラスター) の新規合成・評価を第一の目的とした。また得られた機能調和材料の原子レベルでの情報から材料設計原理構築を可能にするため、超高分解能電子顕微鏡による極微小領域原子配列の定量的評価法の確立を第二の目的とした。
今年度は、1次元自己組織化 C ナノカプセル形成、Au ナノワイヤ内包カーボンナノチューブ自己組織形成、新規Ag@BNナノカプセル大量合成法開発、FeO_x 内包超常磁性BNナノカプセル形成により、新規合成プロセス開発及び新規ナノ構造の創成を達成し、更に微細構造を超高分解能電子顕微鏡-EDX により調べ、その形成メカニズムを解明した。さらにPd 原子インターカレーショングラファイト・(BN)_<36> フラーレンを創成し、分子軌道法・ab initio 第一原理計算・DV-Xα法により原子配列モデル構築・構造最適化・電子状態計算・物性予測を行い、将来的なナノデバイス適用可能性を検討した。またB_<12> 系ボライド、Hg 超伝導関連酸化物中のドーピング元素及び表面酸素原子等の原子位置・局所構造を決定し、原子位置直接決定及び物性発現機構解明に大きく貢献した。

Research Products

• [Publications] T. Oku,H. Kubota,T. Ohgami and K. Suganuma: "Possible detection of doping atoms in C_<60> solid clusters by high-resolution electron microscopy"Carbon. 37. 1299-1309 (1999)
• [Publications] T. Oku,J.-O. Bovin,S. Nakajima,H. Kubota,T. Ohgami and K. Suganuma: "Nanostructural characterization of solid cluster and oxide by HREM with residual indices"Nanostructured Mater.. 12. 563-566 (1999)
• [Publications] T. Oku,T. Hirano,S. Nakajima and K. Suganuma: "Formation and structure of carbon nanocage structures produced by polymer pyrolysis and electron-beam irradiation"J. Mater. Res.. 14. 4166-4273 (1999)
• [Publications] T. Oku,K. Suganuma: "Carbon nanocage structures formed by one-dimensional self-organization of gold nanoparticles"Chem. Comm.. 23. 2355-2356 (1999)
• [Publications] T. Oku, Q. Sun,D.- S. Wang,Q. Wang,Y. Kawazoe,G. Schmid and K. Suganuma: "Atomic structure of Pd-intercalated graphite by high-resolution electron microscopy and first principles calculations"Mater. Trans. JIM.. 40. 1213-12** (1999)
• [Publications] T. Oku and S. Nakajima: "Oxgen arrangement on Hg_<0.5> Tl_<0.5> Ba_2CuO_x (100)surface studied by high-resolution electron microscopy"Appl. Phys. Lett.. 75. 2226-2228 (1999)
• [Publications] T. Hirano,T. Oku and K. Suganuma: "Formation of Gold iron oxide nanoparticles encapsulated in boron nitride sheets"J. Mater. Chem.. 9. 855-857 (1999)
• [Publications] T. Oku and J.- O. Bovin: "Atomic disordering in YB_<56> detected by high-resolution electron microscopy with residual indices"Phil. Mag. A. 79. 821-834 (1999)
• [Publications] A. Carlsson,T. Oku,J.- O. Bovin, G. Karlsson,Y. Okamoto,N. Ohnishi and O. Terasaki: "The structure of iron oxide implanted zeolite Y,determined by high-resolution electron microscopy and refined with selected area electron diffraction amplitudes"Chem. Eur. J.. 5. 244-249 (1999)
• [Publications] 奥 健夫: "原子直視による高分解能電子顕微鏡像定量構造解析"Boundary. 15(8). 28-34 (1999)
• [Publications] 奥 健夫、平野 孝典 菅沼 克昭: "B-C-N フラーメン"Boundary. 15(9). 15-20 (1999)
• [Publications] 奥 健夫、平野 孝典 菅沼 克昭: "C-B-Nフラーレン物質の形成と構造-未知のオングストローム空間-"Materials Integration. 12(8). 41-46 (1999)
• [Publications] T. Oku, T. Kusunose, K. Niihara and K. Suganuma: "Chemical synthesis of silver nanoparticles encapsulated in boron nitride nanocages"J. Mater. Chem.. 10. 255-258 (2000)
• [Publications] T. Oku, T. Hirano,S. Nakajima,K. Suganuma,E. Aoyagi and K. Hiraga: "Formation and structure of cluster-included carbon nanocapsules prepared by polymer pyrolysis"Mol. Cryst. Liq. Cryst.. 印刷中 (2000)
• [Publications] T. Hirano,T. Oku,M. Kawaguchi and K. sugamuma: "Formation and properties of boron nitride nanocapsules with metal and semiconductor nanoparticles"Mol. Cryst. Liq. Cryst.. 印刷中 (2000)
• [Publications] T. Oku,T. Kusunose, T. Hirata,R. Hatakeyama,N. Sato,K. Niihara and K. Suganuma: "Formation and structure of Ag Ge and SiC nanoparticles encapsulated in boron nitride and carbon nanocapsules"Diamond and Related Mater.. 印刷中 (2000)
• [Publications] T. Oku, G. Schmid,K. Suganuma,Q. Sun and Y. Kawazoe: "Structure of Pd-intercalated graphite onions formed by electron irradiation"Mol. Cryst. Liq. Cryst.. 印刷中 (2000)
• [Publications] T. Oku and M. Kawaguchi: "Microstructure analysis of CN-based nanocage materials by high-resolution electron microscopy"Diamond and Related Mater.. (印刷中). (2000)
• [Publications] T. Hirano,T. Oku and K. Suganuma: "Atomic structures and electronic states of boron nitride fullerene and nanotubes"Diamond and Related Mater.. (印刷中). (2000)
• [Publications] T. Oku: "Digital high-resolution electron microscopy of atomic disordering in YB_< 56>"J. Electron Microsc.. 49(印刷中). (2000)
• [Publications] T. Hirano,T. Oku and K. Suganuma: "Fabrication and magnetic properties of boron nitride nanocapsules encaging iron oxide nanoparticles"Diamond and Related Mater.. (印刷中). (2000)
• [Publications] T. Oku,A. Carlsson,J.- O. Bovin,C. Svensson,L. R. Wallenberg,C. Linke and M. Jansen: "Modulated structure of Ag_2SnO_3 studied by high-resolution electron microscopy"Acta Crystallogr. B. (印刷中). (2000)
• [Publications] T. Oku,T. Hirano,M. Kuno,T. Kusunose,K. Niihara and K. Suganuma: "Formation,structure and property of C-BN fullerene materials"Mater. Sci. Eng. B. (印刷中). (2000)
• [Publications] T. Oku,T. Nakayama,M. Kuno,Y. Nozue,L. R. Wallenberg,K. Niihara and K. Suganuma: "Formation and photoluminescence of Ge and Si nanoparticles with oxide layer"Mater. Sci. Eng. B. (印刷中). (2000)
• [Publications] T. Oku and K. Suganuma: "One-dimensional positioning of carbon nanocapsules and spontaneous formation of carbon nanotubes by self-organization of gold nanoparticles"Microelectron. Eng. (印刷中). (2000)
• [Publications] T. Oku,T. Hirano and K. Suganuma: "C and BN Fullerene materials"Proc. 3^< rd> Int. Nano Ceramic Forum and 2^< nd> Int. Symp. Intermaterials. 42-51 (1999)
• [Publications] T. Oku,T. Nakayama,Y. Nozue,T. Hirano,K. Asami,L. R. Wallenberg,K. Niihara,T. Yamamoto and K. Suganuma: "Formation and structure of Ge and nanoparticles"Proc. 3^<rd> Int. Nano Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 193-196 (1999)
• [Publications] T. Hirano,T. Oku, M. Kawaguchi and K. Suganuma: "BN nanocapsules encaging semiconductor and metal nanoparticles"Proc. 3^<rd> Int. Nano Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 197-203 (1999)
• [Publications] T. Hirano,T. Oku and K. Suganuma: "Formation of BN nanotubes and fullerenes"Proc. 3^<rd> Int. Nano Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 204-206 (1999)
• [Publications] T. Oku,T. Hirata,N. Motegi,R. Hatakeyama,T. Hirano,L. R. Wallenberg,K. Suganuma,T. Mieno,N. Y. Sato,H. Mase,M. Niwano,N. Miyamoto and N. Sato: "Structure of carbon nanocapsules with Ge and Si formed by DC-RF hybrid arc-discharge"Proc. 3^<rd> Int. Nano Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 207-209 (1999)
• [Publications] T. Oku and S. Nakajima: "Atomic structures of Hg- and Tl-based high-T_c superconductors"Proc. 3^<rd> Int. Nano Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 210-217 (1999)
• [Publications] T. Oku,and M. Kawaguchi: "Microstructure of CN-based materials studied by HREM"Proc. 3^<rd> Int. Nano Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 258-261 (1999)
• [Publications] T. Oku,H. Kubota and E. Machi: "HREM of C_<60> thin films implanted with nitrogen ions"Proc. 3^< rd> Int Nano. Ceramic Forum and 2^<nd> Int. Symp. Intermaterials. 262-266 (1999)