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Atomic Level Characterization of Organic Molecule-Semiconductor Heterostructures by High-resolution Soft Probes

Research Project

Project/Area Number 15201022
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Nanomaterials/Nanobioscience
Research InstitutionNational Institute for Materials Science (2004)
Tohoku University (2003)

Principal Investigator

NAGAO Tadaaki  NIMS, Nanomaterials Lab., Senior Researcher, 若手国際研究拠点, 主幹研究員 (40267456)

Co-Investigator(Kenkyū-buntansha) SAKURAI Toshio  Tohoku University, Institute for Materials Research, Professor, 金属材料研究所, 教授 (20143539)
SADOWSKI J.T.  Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (40333885)
FUJIKAWA Yasunori  Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (70312642)
YAMADA Yukiko (TAKAMURA Yukiko)  Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (90344720)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥49,010,000 (Direct Cost: ¥37,700,000、Indirect Cost: ¥11,310,000)
Fiscal Year 2004: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2003: ¥38,090,000 (Direct Cost: ¥29,300,000、Indirect Cost: ¥8,790,000)
KeywordsOrganic molecule / Ultrathin film / MBE / Crystal growth / STM / Metal contact / Low-energy electron / III-V族化合物半導体
Research Abstract

In this project, we aimed at elucidating the atomistic picture of the growth process of the organic thin films on semiconductor substrates to obtain useful knowledge for the fabrication of highquality organic thin films. Based on our experience and techniques for characterizing and controlling the epitaxial growth of various semiconductor-on-semiconductor and metal-on-semiconductor surfaces, we tried to extract new knowledge and guiding principles which should be useful for realizing high-quality organic molecular beam epitaxy '(OMBE). Conductive soft materials such as organic semiconductor on Si substrates has become more and more important these days as a promising building blocks for the next generation microelectronics devices. These soft materials are not suited to be studied by conventional surface-sensitive electron probes such as reflection high-energy electron diffraction (RHEED) and other microscopy techniques using electron beams or tunneling electrons. In this context, high … More -sensitivity soft probes without, or with extremely low electron dose has been strongly desired, In the present project, we utilize high-sensitivity soft probes with slow electron beam such as high-resolution electron energy loss spectroscopy (HREELS), spot-profile-analyzing low-energy electron diffraction (SPA LEED) and low-energy electron microscopy (LEEM) and non-contact atomic force microscopy (nc-AFM). These novel analytical tools are nondestructive against organic thin layers and provides us important information on the structural and functional properties of organic heterostructures. In this project, we have systematically searched for good inorganic substrates for the high-quality growth of pentacene overlayer, such as stepped silicon surfaces, high-index silicon surfaces, metal monolayer coated surfaces, etc. Substrates with metallic surfaces are concluded to be not suited for the formation of abrupt interfaces since the molecules lies down and mostly forms disordered wetting layer. The same happens for the insulating substrates such as silicon dioxide. The best system we found was the Bi multi layers on Si(111) -7x7 substrate, which has rather inert chemical nature against the molecule but still highly conductive due to its semimetallic electronic and bond nature. On this template surface, we have found that the pentacene growth perfectly epitaxially to the Si(111) substrate and its domain size ranges more than a few tens of micrometers. We have found various other organic molecules and several good combinations for the hetemepitaxial OMBE growth which will be suited to form p-n organic junction, electroluminescence device structure, etc. We judge our project as very successful one which provided new knowledge on the atomistic characterization and precise control of the OMBE and thus opens up a wide avenue towards the development of new low-dimensional functional materials for the future microelectronics device application. Less

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (20 results)

All 2005 2004 Other

All Journal Article (14 results) Book (1 results) Publications (5 results)

  • [Journal Article] Thin bismuth film as a template for pentacene growth2005

    • Author(s)
      J.T.Sadowaski, T.Nagao, S.Yaginuma, Y.Fujikawa, A.Al-Mahboob, K.Nakajima, T.Sakurai, G.E.Thayer, R.M.Tromp
    • Journal Title

      Applied Physics Letters 86

      Pages: 73109-73109

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Strong Lateral Growth and Crystallization vai Two-dimensional Allotropic Transformation of Semimetal Bi Film2005

    • Author(s)
      T.Nagao, J.T.Sadowaki, M.Saito, S.Yaginuma, T.Kogure, T.Ohno, S.Hasegawa, T.Sakurai
    • Journal Title

      Sueface Science Letters (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hydrogen-Induced Instability of the Ge(105) Surface2005

    • Author(s)
      Y.Fujikawa, T.Nagao, Y.Yamada-Takamura, T.Sakurai, T.Hashimoto, Y.Morikawa, K.Terakura, M.G.Lagally
    • Journal Title

      Physical Review Letters 94

      Pages: 86105-86105

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] シリコン表面上の半金属Bi超薄膜の同素変態2005

    • Author(s)
      長尾忠昭, J.T.Sadowski, 柳沢晋, 斉藤峯雄, 藤川安仁, 大野隆央, 長谷川修司, 櫻井利夫
    • Journal Title

      表面科学 26(印刷中)

    • NAID

      10016147733

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Dimensionality effects on the plasmons in metallic nano-objects2005

    • Author(s)
      T.Nagao
    • Journal Title

      OYOBUTURI 73

      Pages: 1312-1317

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Thin bismuth film as a template for pentacene growth2005

    • Author(s)
      J.T.Sadowski, T.Nagao, S.Yaginuma, Y.Fujikawa, A.Al-Mahboob, K.Nakajima, T.Sakurai, G.E.Thayer, R.M.Tromp
    • Journal Title

      Applied Physics Letters 86

      Pages: 73109-73109

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Strong Lateral Growth and Crystallization via Two-dimensional Allotropic Transformation of Semimetal Bi Film2005

    • Author(s)
      T.Nagao, J.T.Sadowski, M.Saito, S.Yaginuma, T.Kogure, T.Ohno, S.Hasegawa, T.Sakurai
    • Journal Title

      Surface Science Letters (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] シリコン表面上の半金属Bi超薄膜の同素変態2005

    • Author(s)
      長尾忠昭, J.T.Sadowski, 柳沼晋, 斉藤峯雄, 藤川安仁, 大野隆央, 長谷川修司, 櫻井利夫
    • Journal Title

      表面科学 26(印刷中)

    • NAID

      10016147733

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 金属ナノ物質の次元性とプラズモン(および同号表紙写真)2004

    • Author(s)
      長尾忠昭
    • Journal Title

      応用物理 73

      Pages: 1312-1312

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Nanofilm Allotrope and Structural Transformation of Bi film on Si (111)-7×72004

    • Author(s)
      T.Nagao, J.T.Sadowski, M.Saito, S.Yaginuma, T.Kogure, T.Ohno, Y.Fujikawa, S.Hasegawa, T.Sakurai
    • Journal Title

      Physical Review Letters 93

      Pages: 10551-10551

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Nanofilm Allotrope and Structural Transformation of Bi film on Si(111)-7 x 72004

    • Author(s)
      T.Nagao, J.T.Sadowski, M.Saito, S.Yaginuma, T.Kogure, T.Ohno, Y.Fujikawa, S.Hasegawa, T.Sakurai
    • Journal Title

      Physivcal Review Letters 93

      Pages: 10551-10551

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 金属ナノ物質の次元性プラズモン2004

    • Author(s)
      長尾忠昭
    • Journal Title

      応用物理 73

      Pages: 1312-1312

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Nanofilm Allotrope and Structural Transformation of Bi film on Si(111)-7×72004

    • Author(s)
      T.Nagao, J.T.Sadowski, M.Saito, S.Yaginuma, T.Kogure, T.Ohno, Y.Fujikawa, S.Hasegawa, T.Sakurai
    • Journal Title

      Physical Review Letters 93

      Pages: 10551-10551

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7×7) surface2004

    • Author(s)
      K.H.Wu, A.l.Oreshkin, Y.Takamura, Y.Fujikawa, T.Nagao, T.Briere, V.Kumar, Y.Kawazoe, R.F.Dou, Q.-K.Xue, T.Sakurai
    • Journal Title

      Physical Review B 70

    • Related Report
      2004 Annual Research Report
  • [Book] 表面物性工学ハンドブック(分担執筆)9. 5章, 8. 3. 2章2005

    • Author(s)
      長尾忠昭
    • Total Pages
      5
    • Publisher
      丸善
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] S.Yaginuma, T.Nagao, J.Sadowski, A.Pucci, F.Fujikawa, T.Sakurai: "Surface pre-melting and surface flattening of Bi nanoflim on Si(111)-7×7"Surface Science Letters. 547. L877-L881 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kehui Wu, Y.Fujikawa, T.Nagao, Y.Hasegawa, K.S.Nakayama, Q.K.Xue, E.G.Wang, T.Briere, V.Kumar, Y.Kawazoe S.B.Zhang, T.Sakurai: "Na Adsorption on The Si(111)-(7×7) Surface : From Two Dimensional G as to Nanocluster Array"Physical Review Letters. 91. 12601 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] J.T.Sadowski, T.Nagao, M.Saito, S.Yaginuma, F.Fujikawa, T.Ohno, T.Sakurai: "STM/STS studies of the structural phase transition in the growth of ultra-thin Bi films on Si(111)"Acta Physica Polonica A. 104. 381-387 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Sekiguchi, T.Nagao, S.Hasegawa: "Transformation dynamics in Ca-induced reconstructions on Si(111) surfac"e-J.Surf.Sci.Nanotech.. 1. 26-31 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] R.Z.Bakhtizin, K.H.Wu, Q.Z.Xue, Q.K.Xue, T.Nagao, T.Sakurai: "STM study of Ag film initial stages growth on a GaN(0001) surface grown by MBE"Phys.Low-Dimensional Structures. 3-4. 21-29 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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