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2015 Fiscal Year Annual Research Report

薬物・毒物の分析を可能とする表面支援レーザー脱離イオン化質量分析システム

Research Project

Project/Area Number 24241041
Research InstitutionHokkaido University

Principal Investigator

米澤 徹  北海道大学, 工学(系)研究科(研究院), 教授 (90284538)

Co-Investigator(Kenkyū-buntansha) 石田 洋平  北海道大学, 工学(系)研究科(研究院), 助教 (00726713)
Project Period (FY) 2012-10-31 – 2016-03-31
Keywordsナノ粒子 / クラスター / 質量分析 / レーザー脱離 / 薬物 / イオン化
Outline of Annual Research Achievements

酸化チタンナノ粒子やこれまで作成した金属酸化物ドープナノ粒子や他の金属ナノ粒子・金属酸化物ナノ粒子を用いてLDI-MSによる薬物・毒物の検出実験を行った。さまざまな酸化チタンナノ粒子を用いた系では、その結晶化構造と検出率の関係、粒子径と検出率、ナノ粒子の純度との関係を明らかとなった。また、チタン棒からナノ粒子をプラズマで合成した場合、ブラック酸化チタンが得られ、多くの波長域で光が吸収可能であることが示された。ドープしない酸化チタンの場合には、分子量に対応するNa附加体が観察され、プロトン附加体は全く観察されない。この検出率と結晶構造との関係は従来述べられていたものとはやや異なることが考えられ、新規なイオン化プロセスが考えらえる。それは結晶構造の差が大きくイオン化に影響しているものと考えられるが、バンドギャップの大きさである可能性がある。これは、ナノ粒子の吸収波長とレーザー波長が相関するであろうことを示しており、SALDI-MS用ナノ材料の設計指針として新しく提案できるものとなった。
また、MALDI-MSでは検出できない化合物がこのシステムで検出可能となることを明らかとした。そのなかには睡眠導入剤や広く用いられている薬物が含まれており、これらを容易に検出できる可能性を見出したことは興味深い。さらに酸化物ナノ粒子のドープ法についてさまざまに検証し、液中プラズマ法という最適な方法のほか、単なる含浸法によっても表面部分に容易に金属イオンを導入でき、その影響で、検出感度をさらに上げることが可能であることが見いだされた。
本研究成果により、新規なSALDI-MS用材料の開発と、SALDI-MSのイオン化メカニズム解明の端緒をつかむことができたと考えている。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

  • Research Products

    (39 results)

All 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (18 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 18 results,  Acknowledgement Compliant: 14 results,  Open Access: 7 results) Presentation (16 results) (of which Int'l Joint Research: 8 results,  Invited: 10 results) Book (2 results) Remarks (1 results)

  • [Int'l Joint Research] 国立台湾大学(中国(台湾))

    • Country Name
      その他の国・地域
    • Counterpart Institution
      国立台湾大学
  • [Int'l Joint Research] 北京大学(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      北京大学
  • [Journal Article] Surface-Assisted Laser Desorption Ionization Mass Spectrometry (SALDI-MS) of Low-Molecular-Weight Medicines and Toxic Materials Using Commercial TiO2 Nanoparticles2016

    • Author(s)
      Tetsu Yonezawa, Takashi Asano, Masaki Matsubara
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 89 Pages: 346-353

    • DOI

      10.1246/bcsj.20150337

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Growth of Sputtered Silver Nanoparticles on a Liquid Mercaptan Matrix with Controlled Viscosity and Sputter Rate2016

    • Author(s)
      Yohei Ishida, Satoshi Udagawa, and Tetsu Yonezawa
    • Journal Title

      Colloids and Surfaces A: Physicochemical and Engineering Aspects

      Volume: 498 Pages: 106-111

    • DOI

      DOI: 10.1016/j.colsurfa.2016.03.044

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Reproducible Shape Control of Single-Crystal SnO Micro Particles2016

    • Author(s)
      Mai Thanh Nguyen, Hiroaki Shirai, Chondanai Tiankanon, Hiroki Tsukamoto, Yohei Ishida, and Tetsu Yonezawa
    • Journal Title

      RSC Advances

      Volume: 6 Pages: 26725-26733

    • DOI

      DOI: 10.1039/C5RA25676C

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Au nanopaticles prepared using a coated electrode in plasma-in-liquid process: Effect of the solution pH2016

    • Author(s)
      David Cempel, Mai Thanh Nguyen, Yohei Ishida, Hiroki Tsukamoto, Hiroaki Shirai, Yongmin Wang, Kevin C.-W. Wu, and Tetsu Yonezawa
    • Journal Title

      Journal of Nanoscience and Nanotechnology

      Volume: in press Pages: in press

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A New Approach for Additive-free Room Temperature Sintering of Conductive Patterns Using Polymer-stabilized Sn Nanoparticles2016

    • Author(s)
      Hiroaki Shirai, Mai Thanh Nguyen, Yohei Ishida, and Tetsu Yonezawa
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 4 Pages: 2228-2234

    • DOI

      10.1039/C6TC00161K

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Double Target Sputtering into Liquid: A New Approach for Preparation of Ag-Au Alloy Nanoparticles2016

    • Author(s)
      Mai Thanh Nguyen, Tetsu Yonezawa, Yuan Wang, and Tomoharu Tokunaga
    • Journal Title

      Materials Letters

      Volume: 171 Pages: 75-78

    • DOI

      10.1016/j.matlet.2016.02.047

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Controlling an electrostatic repulsion by oppositely charged surfactants towards positively charged fluorescent gold nanoclusters2016

    • Author(s)
      Ryan D. Corpuz, Yohei Ishida, and Tetsu Yonezawa
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 18 Pages: 8773-8776

    • DOI

      10.1039/C6CP00538A

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Surface assisted laser desorption ionization mass spectrometry (SALDI-MS) of low-molecular-weight medicines and toxic materials using commercial TiO2 nanoparticles2016

    • Author(s)
      Tetsu Yonezawa, Takashi Asano, and Masaki Matsubara
    • Journal Title

      Bulletin of Chemical Society of Japan

      Volume: 89 Pages: 346-353

    • DOI

      10.1246/bcsj.20150337

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] De Novo Synthesis of Gold-Nanoparticle-Embedded, Nitrogen-Doped Nanoporous Carbon Nanoparticles (Au@NC) with Enhanced Reduction Ability2016

    • Author(s)
      Yu-Te Liao, Jeffrey E. Chen, Yohei Ishida, Tetsu Yonezawa, Wei-Chen Chang, Saad M. Alshehri, Yusuke Yamauchi, and Kevin C.-W. Wu
    • Journal Title

      ChemCatChem

      Volume: 8 Pages: 502-509

    • DOI

      10.1002/cctc.201501020

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hard-Templating Synthesis of Macroporous Platinum Microballs (MPtM)2016

    • Author(s)
      Hiroaki Shirai, Yu-Yuan Huang, Tetsu Yonezawa, Wei-Chen Chang, Tomoharu Tokunaga, Saad Alshehri, Bo Jiang, Yusuke Yamauchi, and Kevin C.-W. Wu
    • Journal Title

      Materials Letters

      Volume: 164 Pages: 488-492

    • DOI

      10.1016/j.matlet.2015.11.002

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] X-ray diffraction and high-resolution TEM observations of biopolymer nanoskin-covered metallic copper fine particles: preparative conditions and surface oxidation states2015

    • Author(s)
      Tetsu Yonezawa, Yoshiki Uchida, and Hiroki Tsukamoto
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 17 Pages: 32511-32516

    • DOI

      10.1039/C5CP06107E

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Synthesis of magnetic mesoporous titania colloidal crystals through evaporation induced self-assembly in emulsion as effective and recyclable photocatalysts2015

    • Author(s)
      Jeffrey E Chen, Hong-Yuan Lian, Saikat Dutta, Saad M. Alshehri, Yusuke Yamauchi, Mai Thanh Nguyen, Tetsu Yonezawa, and Kevin C.-W. Wu
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 17 Pages: 27653-27657

    • DOI

      DOI: 10.1039/C5CP05005G

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Novel Physical Approach for Cationic-Thiolate Protected Fluorescent Gold Nanoparticles2015

    • Author(s)
      Yohei Ishida, Chaiyathat Lee and Tetsu Yonezawa
    • Journal Title

      Scientific Reports

      Volume: 5 Pages: 15372

    • DOI

      10.1038/srep15372

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Plasma-Induced Tungsten Doping of TiO2 Nanoparticles for Enhanced Photocatalysis using Visible Light2015

    • Author(s)
      Yohei Ishida, Yasutomo Motokane, Tomoharu Tokunaga, and Tetsu Yonezawa
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 17 Pages: 24556-24559

    • DOI

      10.1039/C5CP03400K

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Mesoporous Europium-Doped Titania Nanoparticles (Eu-MTNs) for Luminescence-Based Intracellular Bio-Imaging2015

    • Author(s)
      Kuan-Chou Chen, Saikat Dutta, Saad M. Alshehri, Yuusuke Yamauchi, Mai Thanh Nguyen, Tetsu Yonezawa, Kun-Hung Shen, and Kevin C.-W. Wu
    • Journal Title

      Journal of Nanoscience and Nanotechnology

      Volume: 15 Pages: 9802-9806

    • Peer Reviewed
  • [Journal Article] Enhanced Terahertz Emission from CuxO/Metal Thin Film Deposited on Columnar-Structured Porous Silicon2015

    • Author(s)
      Xu Lu, Yohei Ishida, Tomobumi Mishina, Thanh Mai Nguyen, and Tetsu Yonezawa
    • Journal Title

      Bulletin of Chemical Society of Japan

      Volume: 88 Pages: 1385-1387

    • DOI

      10.1246/bcsj.20150173

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Black TiO2 Nanoparticles by a Microwave-induced Plasma over Titanium Complex Aqueous Solution2015

    • Author(s)
      Yohei Ishida, Wataru Doshin, Hiroki Tsukamoto, and Tetsu Yonezawa
    • Journal Title

      Chemistry Letters

      Volume: 44 Pages: 1327-1329

    • DOI

      10.1246/cl.150531

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Synthesis and fluorescence property of columnar porous silicon: the influence of Cu-coating on photoluminescence behaviours from hydrofluoric-acid-treated aged columnar porous silicon2015

    • Author(s)
      Xu Lu, Yohei Ishida, and Tetsu Yonezawa
    • Journal Title

      New Journal of Chemistry

      Volume: 39 Pages: 6267-6273

    • DOI

      10.1039/C5NJ00909J

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 酸化チタンナノ粒子へのプラズマ処理による簡便な可視光応答化技術の開発2016

    • Author(s)
      石田洋平・元兼康智・米澤 徹・徳永智春
    • Organizer
      日本化学会 第96春季年会
    • Place of Presentation
      同志社大学 京田辺キャンパス
    • Year and Date
      2016-03-27 – 2016-03-29
  • [Presentation] Ligand Induced Shape Formation of SnO Particles: from Cube to Square and Starfish-like Sheets2016

    • Author(s)
      Mai Thanh NGUYEN, Tetsu YONEZAWA, Hiroaki SHIRAI, Chondanai TIANKANON, Yohei ISHIDA
    • Organizer
      日本化学会 第96春季年会
    • Place of Presentation
      同志社大学 京田辺キャンパス
    • Year and Date
      2016-03-27 – 2016-03-29
  • [Presentation] 液中プラズマを用いた金属酸化物の合成2016

    • Author(s)
      米澤 徹・塚本宏樹・本野真梧・道心 渉・石田洋平・徳永智春
    • Organizer
      日本化学会 第96春季年会
    • Place of Presentation
      同志社大学 京田辺キャンパス
    • Year and Date
      2016-03-27 – 2016-03-29
  • [Presentation] 常温で導電性を示す金属スズ微粒子2016

    • Author(s)
      米澤 徹
    • Organizer
      ナノハイブリッドマテリアルに関する研究会
    • Place of Presentation
      宮城 バーデン家壮鳳
    • Year and Date
      2016-01-22
    • Invited
  • [Presentation] Metal oxide nanoparticles prepared by plasma in liquid processes2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      Lecture in CPE Lyon
    • Place of Presentation
      CPE Lyon, France
    • Year and Date
      2015-12-14
    • Int'l Joint Research / Invited
  • [Presentation] マイクロ波液中プラズマ法を用いた酸化チタンナノ粒子改質による可視光吸収2015

    • Author(s)
      元兼康智、石田洋平、米澤徹
    • Organizer
      平成27年度公益社団法人日本顕微鏡学会 北海道支部学術講演会
    • Place of Presentation
      北海道大学フロンティア応用科学研究棟 鈴木章ホール
    • Year and Date
      2015-12-12
    • Invited
  • [Presentation] Novel Direct Preparation of Tungsten Oxide Nanoparticles from Metallic Tungsten Wires Using Plasma in Liquid Process2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      4th Nano Today Conference
    • Place of Presentation
      JW Mariott Marquis Dubai, Dubai, UAE
    • Year and Date
      2015-12-06 – 2015-12-10
    • Int'l Joint Research
  • [Presentation] Plasma in liquid process for metal oxide modification2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      4th Hokkaido University - Seoul National University Joint Symposium
    • Place of Presentation
      Seoul National University
    • Year and Date
      2015-11-27
    • Int'l Joint Research / Invited
  • [Presentation] Modification of Titanium Oxide Nanoparticles By Using Plasma in Liquid Processes and Their Applications to SALDI-MS2015

    • Author(s)
      Tetsu Yonezawa and Hiroki Tsukamoto
    • Organizer
      6th Asian Conference on Colloid and Interface Science
    • Place of Presentation
      Arkas SASEBO
    • Year and Date
      2015-11-24 – 2015-11-27
    • Int'l Joint Research / Invited
  • [Presentation] 金属酸化物ナノ粒子の新奇合成法としての液中プラズマ2015

    • Author(s)
      米澤 徹
    • Organizer
      日本ゾル―ゲル学会 第13回討論会
    • Place of Presentation
      北海道大学 フロンティア応用科学研究棟
    • Year and Date
      2015-11-19 – 2015-11-20
    • Invited
  • [Presentation] Modification of Metal Oxides by Using Microwave-Induced Plsma in Liquid Process2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      MSA International Symposium on Materials Science and Nanotechnology (MSN) International Science and Nature Congress 2015 (ISNaC 2015)
    • Place of Presentation
      Putra World Trade Center, Kuala Lumpur, Malaysia
    • Year and Date
      2015-09-21 – 2015-09-23
    • Int'l Joint Research / Invited
  • [Presentation] チタニアへのドーピングとSALDI-MSへの応用2015

    • Author(s)
      米澤 徹、長谷川 千裕
    • Organizer
      第66回コロイドおよび界面化学討論会
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2015-09-10 – 2015-09-12
  • [Presentation] Tungsten Doping of Titanium Oxide Nanoparticles by Using Plasma in Liquid Process2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      Post conference of 2015 International Conference of Colloids and Interface Science
    • Place of Presentation
      Chung Shan Medical Univ., Taichung City, Taiwan
    • Year and Date
      2015-07-25
    • Int'l Joint Research / Invited
  • [Presentation] 液中プラズマ法による酸化チタンナノ粒子の改質2015

    • Author(s)
      元兼康智・石田洋平・米澤 徹
    • Organizer
      日本化学会北海道支部 2015年夏季研究発表会
    • Place of Presentation
      北海道教育大学函館校
    • Year and Date
      2015-07-18
  • [Presentation] Doping of Titanium Oxide Nanoparticles Using Plasma in Liquid Process2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      8th International Conference on Materials for Advanced Technologies of the Materials Research Society of Singapore & 16th IUMRS – Intentional Conference in Asia
    • Place of Presentation
      Suntec Singapore
    • Year and Date
      2015-06-28 – 2015-07-03
    • Int'l Joint Research / Invited
  • [Presentation] Finding Detailed Structure of Nanoparticles : EXAFS and STEM2015

    • Author(s)
      Tetsu Yonezawa
    • Organizer
      Xingda Presentation
    • Place of Presentation
      Peking University, China
    • Year and Date
      2015-04-24
    • Int'l Joint Research / Invited
  • [Book] ナノ材料解析の実際2016

    • Author(s)
      米澤 徹、朝倉清高、幾原雄一
    • Total Pages
      約300
    • Publisher
      講談社
  • [Book] 産業応用を目指した無機・有機新材料創製のための構造解析技術2015

    • Author(s)
      米澤 徹、陣内浩司
    • Total Pages
      290
    • Publisher
      シーエムシー出版
  • [Remarks] http://labs.eng.hokudai.ac.jp/labo/limsa/

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Published: 2017-01-06   Modified: 2022-02-16  

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