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Shape analysis of crystalline nanoparticles with superspherical approximation having physical meanings

Research Project

Project/Area Number 25390029
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nanomaterials engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

ONAKA Susumu  東京工業大学, 総合理工学研究科(研究院), 教授 (40194576)

Co-Investigator(Kenkyū-buntansha) MIYAJIMA Yoji  東京工業大学, 総合理工学研究科, 助教 (80506254)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsナノ粒子 / 析出物 / 平衡形状 / エネルギー論 / 超球 / 表面エネルギー
Outline of Final Research Achievements

Crystalline nanoparticles or nanoprecipitates in alloys often have near polyhedral shapes composed of low-index planes and round corners. Energy consideration discussing anisotropic properties such as anisotropic surface/interface energy densities could reveal physical reasons of such shapes. However, to discuss the validity of the energy consideration, it is efficient to derive algebraic formulas to reproduce the near polyhedral shapes. In the present study, various extended superspheres are formulated and measures to characterize the near polyhedral shapes are obtained.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (4 results)

All 2016 2013 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (2 results) Remarks (1 results)

  • [Journal Article] Extended Superspheres for Shape Approximation of Near Polyhedral Nanoparticles and a Measure of the Degree of Polyhedrality2016

    • Author(s)
      S. Onaka
    • Journal Title

      Nanomaterials

      Volume: 8 Issue: 2 Pages: 27-27

    • DOI

      10.3390/nano6020027

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 超球:角が丸く多面体に近い形状(球と多面体のあいだの形状)2016

    • Author(s)
      尾中 晋
    • Organizer
      強さと変形のサイエンス研究会
    • Place of Presentation
      宮城県宮城郡 松島町 ホテル一の坊
    • Year and Date
      2016-04-12
    • Related Report
      2015 Annual Research Report
  • [Presentation] ファセットを持ち角が丸い金属微粒子形状の超球近似による記述2013

    • Author(s)
      宮澤知孝,宮嶋陽司,尾中 晋
    • Organizer
      日本金属学会2013年秋期講演大会
    • Place of Presentation
      金沢大学
    • Related Report
      2013 Research-status Report
  • [Remarks] 材料中の析出物の形状についての考察およびその発展

    • URL

      http://kamonohashi.iem.titech.ac.jp/onaka_folder/onaka/supersphere/supersphere1.html

    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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