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Development of non-destructive discrimination method for single fibers based on the chemical structure of dyes and catalysts for social safety

Research Project

Project/Area Number 20K04963
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 25010:Social systems engineering-related
Research InstitutionKochi University

Principal Investigator

Nishiwaki Yoshinori  高知大学, 教育研究部人文社会科学系教育学部門, 教授 (50632585)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords科学捜査 / 繊維 / 染料 / 触媒 / X線分析 / 非破壊 / 異同識別 / マイクロビーム / 微量元素 / 単繊維
Outline of Research at the Start

刑事犯罪解明には、単繊維の異同識別は極めて重要である。しかし、現在警察で実施されている鑑定手法では鑑別できない単繊維が多数存在する。単繊維には特徴的な多数の染料や触媒が使用されているが、異同識別に利用されていない。そこで、本研究では、放射光を用いた蛍光X線分析(XRF)とX線吸収微細構造分析(XAFS)を組み合わせ、単繊維に含有する微量元素成分・染料と触媒の化学構造に着目した社会安全に資する単繊維の新規非破壊異同識別法の開発を実施する。本研究の実施により、繊維鑑定の精度が大幅に改善し、社会安全にとって重大な刑事犯罪の検挙率向上に寄与する成果が期待できる。

Outline of Final Research Achievements

Single fibers are important evidence samples for clarifying many criminal cases.
In many cases, the conventional method cannot discriminate between different types of fibers. Therefore, a new method of single fiber analysis is required. This study developed a nondestructive discrimination method for single fiber dissimilarity, focusing on elemental information and chemical structures derived from dyes and catalysts. A combination of X-ray fluorescence spectrometry (XRF) and X-ray absorption fine structure technique (XAFS) utilizing synchrotron radiation was used for the analysis method. As a result, elemental information and chemical structures derived from dyes and catalysts can be used as indicators to discriminate silk and polyester single fibers with high accuracy. This method has shown potential for use as a new nondestructive discrimination method for single fibers that can contribute to the safety of society.

Academic Significance and Societal Importance of the Research Achievements

単繊維に用いられる染料・触媒は種類が多く、本研究によって開発された手法は高い異同識別力を有する。本研究は科学捜査・放射光科学の観点から、極めて高い学術的価値を有する。本研究の独創的な点は、従来、外観・色・材質によって識別していた単繊維を使用される染料・触媒で行う点である。また、本法の技術は、近年重大な環境問題とされている海洋マイクロプラスチックへの応用が期待できる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2023 2022 2021 2020 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] 科学捜査における微細サンプルのスクリーニングおよび非破壊分析の重要性2023

    • Author(s)
      西脇芳典
    • Journal Title

      ぶんせき

      Volume: 2023年2号 Pages: 50-56

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nondestructive discrimination of black ceramic prints on automotive glasses by portable X‐ray fluorescence spectrometer2022

    • Author(s)
      Ishimi Akane、Nakanishi Toshio、Seto Yasuo、Nishiwaki Yoshinori
    • Journal Title

      Journal of Forensic Sciences

      Volume: 67 Issue: 5 Pages: 1825-1835

    • DOI

      10.1111/1556-4029.15099

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 科学捜査のための光を用いた分析技術の動向ー単繊維鑑定を例にー2022

    • Author(s)
      西脇芳典
    • Journal Title

      光学

      Volume: 51 Pages: 386-392

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nondestructive discrimination of red silk single fibers using total reflection X-ray fluorescence spectrometry and synchrotron radiation X-ray fluorescence spectrometry2021

    • Author(s)
      Hibiki Komatsu, Hikari Takahara, Wataru Matsuda, Yoshinori Nishiwaki
    • Journal Title

      journal of forensic sciences

      Volume: 66 Issue: 5 Pages: 1658-1668

    • DOI

      10.1111/1556-4029.14764

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nondestructive Differentiation of Polyester Single White Fibers Using Synchrotron Radiation Microbeam X-ray Fluorescence Spectrometry with Vertical Focusing2020

    • Author(s)
      Yoshinori Nishiwaki, Sadao Honda, Takuma Yamato, Ryosuke Kondo, Atsunori Kaneda, Shinjiro Hayakawa
    • Journal Title

      JOURNAL OF FORENSIC SCIENCES

      Volume: - Issue: 5 Pages: 1474-1479

    • DOI

      10.1111/1556-4029.14481

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] SPring-8のナノビーム放射光X線を用いた 単繊維鑑定技術の開発2023

    • Author(s)
      西脇 芳典
    • Organizer
      SPring-8法科学シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Nanobeam synchrotron radiation X-ray fluorescence imaging for single wool fibers for forensic investigation2022

    • Author(s)
      H. Komatsu, T. Iwai, S. Watanabe, T. Nakanishi, Y. Seto, Y. Nishiwaki
    • Organizer
      EAFS 2022 (European Academy of Forensic Science Conference )
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discrimination of PET bottle fragments using synchrotron radiation X-ray absorption fine structure spectroscopy2022

    • Author(s)
      Y. Nishiwaki
    • Organizer
      EAFS 2022 (European Academy of Forensic Science Conference )
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 科学捜査のための染色ウール単繊維断面の走査型放射光マイクロビームX線蛍光顕微鏡分析2021

    • Author(s)
      小松 響, 岩井貴弘, 渡邊慎平, 中西俊雄, 瀬戸康雄, 西脇芳典
    • Organizer
      第 57 回 X 線分析討論会
    • Related Report
      2021 Research-status Report
  • [Remarks] 化学鑑定研究×ドラマ『科捜研の女』:人気長寿ドラマを、科学捜査の専門家が「鑑定」する

    • URL

      http://hotozero.com/knowledge/kochi-u_kasouken20/

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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