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2004 Fiscal Year Final Research Report Summary

Tailoring organic nanoparticle by laser ablation of its bulk crystal in poor solvent

Research Project

Project/Area Number 15310074
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nanostructural science
Research InstitutionOsaka University

Principal Investigator

ASAHI Tsuyoshi  Osaka University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (20243165)

Project Period (FY) 2003 – 2004
Keywordsnanoparticle / dye molecule / organic pigments / laser ablation / ablation in liquid / photo-thermal mechanism / size-control
Research Abstract

We have recently developed a novel preparation method of organic nanoparticles, where microcrystalline powder suspended in a poor solvent was converted into the nanoparticle colloidal solution by intense pulse laser irradiation. In this project, we have applied this method to several organic dyes as follows : Benzidine Yellow, Oralith Brilliant Pink R, Deep Red, quinacridone(QA), and aluminum chloride phthalocyaninec), Vanadil phthalocyanine, and examined the effect of laser pulse duration, intensity, and wavelength on the particle size.
When using nanosecond pulse YAG laser, stable colloidal solutions of nanoparticles were obtained at certain laser fluence and their size was about 50 nm for all compounds. In the case of QA, the crystalline phase and the mean size were changed by tuning the intensity and wavelength of laser pulses. On the other hand, their size was reduced into a 10 nm order by using femtosecond laser. This particles size have not bee achieved with other preparation methods such as mechanical grinding.
We also examined the nanoparticle formation processes and the mechanism by means of steady and time-resolve spectroscopic methods, and demonstrated that nanoarticle formation can be ascribed in terms of photo-thermal laser ablation mechanism. The obtained dependence of particle size on the pulse duration, intensity, and wavelength of laser was discussed on the bases of ultrafast laser heating of organic solid and the competitive cooling process through thermal diffusion into poor solvent.

  • Research Products

    (12 results)

All 2005 2004 2003

All Journal Article (10 results) Book (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Masuhara : Preparation of Organic Dye Nanoparticles by Nanosecond Laser Ablation in a Poor Solvent2005

    • Author(s)
      T.Asahi, K.Yuyama, T.Sugiyama, H.Masuhara
    • Journal Title

      The Review of Laser Engineering 33

      Pages: 41-46

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Preparation of Organic Dye Nanoparticles by Nanosecond Laser Ablation in a Poor Solvent (in Japanese)2005

    • Author(s)
      T.Asahi, K.Yuyama, T.Sugiyama, H.Masuhara
    • Journal Title

      The Review of Laser Engineering 33

      Pages: 41-46

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Formation of 10 nm-sized Oxo(phtalocyaninato)vanadium (IV) Particles by Femtosecond Laser Ablation in Water2004

    • Author(s)
      T.Sugiyama, T.Asahi, H.Masuhara
    • Journal Title

      Chemistry Letters 33

      Pages: 724-725

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 有機固体のフェムト秒レーザーナノ加工2004

    • Author(s)
      朝日剛, 吉川洋史, 矢代正樹, 杉山輝樹, 増原宏
    • Journal Title

      光・量子デバイス研究会資料集(OQD-04-37)

      Pages: 31-34

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Nanometer Photothermal Heating and Cooling Dynamics of Azo Polymer Film Elucidated by Analyzing Nanosecond Laser-Induced Expansion/Contraction Behavior2004

    • Author(s)
      T.Tada, T.Asahi, M.Tsuchimori, O.Watanabe, H.Masuhara
    • Journal Title

      Japanese Journal of Applied Physics 43

      Pages: 5337-5346

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Tailoring nano-structures of organic molecular solids using femtosecond laser (in Japanese)2004

    • Author(s)
      T, Hiroshi Y.Yoshikawa, T.Sugiyama, H.i Masuhara
    • Journal Title

      The Paper of Technical Meeting on Optical and Quantum Devices, IEE Japan

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Nanometer Photothermal Heating and Cooling Dynamics of Azo Polymer Film Elucidated by Analyzing Nanosecond Laser-Induced Expansion/Contraction Behavior2004

    • Author(s)
      T.Tada, T.Asahi, M.Tsuchimori, O.Watanabe1, H.Masuhara
    • Journal Title

      Jpn.J.Appl.Phys. 43

      Pages: 5337-5346

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Preparation of Phthalocyanine Nanoparticles by Laser Ablation of its Microcrystal Dispersed in Poor Solventsin2004

    • Author(s)
      T.Asahi, H.Masuhara
    • Journal Title

      Handai Nanophotonics (H.Masuhara, S.Kawata Eds.)(Elsevier)

      Pages: 225-236

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Solvent dependent size and phase of vanadyl phthlocyanine nanoparticles formed by laser ablation of VOPc crystals dispersed solution2003

    • Author(s)
      Y.Tamaki, T.Asahi, H.Masuhara
    • Journal Title

      Japanese Journal of Applied Physics 42

      Pages: 2725-2732

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Solvent Dependent Size and Phase of Vanadyl Phthlocyanine Nanoparticles Formed by Laser Ablation of Its Crystals Dispersed Solution2003

    • Author(s)
      Y.Tamaki, T.Asahi, H.Masuhara
    • Journal Title

      Jpn.J.Appl.Phys. 42

      Pages: 2775-2732

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Handai Nanophotonics2004

    • Author(s)
      T.Asahi 他共著
    • Total Pages
      473
    • Publisher
      Elsevior
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] 有機化合物の超微粒子の製造方法2004

    • Inventor(s)
      増原 宏, 朝日 剛, 杉山 輝樹
    • Industrial Property Rights Holder
      独立行政法人科学技術振興機構
    • Industrial Property Number
      特願2004-047638
    • Filing Date
      2004-02-24
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2006-07-11  

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