二光子吸収発光・フォトクロミズム反応のための大面積近接場光源の実現

2014 Fiscal Year Annual Research Report

• Project/Area Number: 24656040
• Research Institution: National Institute for Materials Science
• Principal Investigator: 三木 一司 独立行政法人物質・材料研究機構, 高分子材料ユニット, グループリーダー (30354335)
• Co-Investigator(Kenkyū-buntansha): 磯崎 勝弘 京都大学, 化学研究所, 助教 (30455274)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 近接場 / 光化学 / 流体デバイス / プラズモン

Outline of Annual Research Achievements

最終年度の目標であった、ITO基板上の銀ナノ粒子２次元配列の作製技術の確立は、銀ナノ粒子に代えてAg@Auコアシェル型ナノ粒子の採用する事で達成する事ができた。Ag@Auコアシェル型ナノ粒子の採用の方が有利な点は、（１）粒子配列によるレッドシフトの効果（粒子径により600-1100nmの近赤外域までレッドシフト）と（２）Auを中心に考えるとAgシェル層の成長により共鳴波長はブルーシフトする、二つの効果を利用して、粒径と共鳴波長をある程度独立に決める事が可能になる。例えば、光学的断面積に有利な大粒径でも共鳴波長が600nm程度にすることなどが可能になる。又銀粒子に比べて、Ag@Auコアシェル型ナノ粒子の方が耐酸化性で有利である。
上記Ag@Auコアシェル型ナノ粒子を大粒径でも配列化できるように、長さが異なる２種類のアルカンチオール分子の比率を変える事で凝集しやすさを制御する事に成功し、この技術の利用で80%以上の被覆率の粒子の２次元配列化に成功した。現在まで、10nm以下の粒子の２次元配列化は多く報告されているが、これ以上だと殆ど報告が無い。本成果の論文を現在執筆中であるが、金属ナノ粒子配列を用いている研究としては大きなブレークスルーになるものである。
本年度の成果により、ITO基板上にAg@Auコアシェル型ナノ粒子を大粒径でも配列化できる技術を確立する事に成功し、光学的に有利な基板上に、近接場光（局在表面プラズモン）を高輝度で発生させる技術に貢献することができた。

Research Products

• [Journal Article] Selective Two-Photon-Absorption-Induced Reactions of Anthracene-2-Carboxylic Acid on Tunable Plasmonic Substrate with Incoherent Light Source (2015)
  • Author(s): Francesca Pincella, Katsuhiro Isozaki, Tomoya Taguchi, Yeji Song, and Kazushi Miki
  • Journal Title: Journal of Nanoscience and Nanotechnology Volume: 2015 Pages: 1171-1179
  • DOI: 10.1166/jnn.2015.9501
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Visible light-driven plasmonic photocatalyst (2014)
  • Author(s): Francesca Pincella, Katsuhiro Isozaki, and Kazushi Miki
  • Journal Title: Light: Science & Applications Volume: 3 Pages: e133-1 - e133-6
  • DOI: 10.1038/lsa.2014.14
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Enhancement of self-assembly of large-sized (> 10 nm) gold nanoparticles locally on an ITO substrate (2014)
  • Author(s): Takao Ochiai, Katsuhiro Isozaki, Satoko Nishiyama, and Kazushi Miki
  • Journal Title: Applied Physics Express Volume: 7 Pages: 065001（4 pages)
  • DOI: 10.7567/APEX.7.065001
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Square-centimeter-scale 2D-arrays of Au@Ag core-shell nanoparticles towards practical SERS substrates with enhancement factor of 10^7 (2014)
  • Author(s): Francesca Pincella, Yeji Song, Takao Ochiai, Katsuhiro Isozaki, Kenji Sakamoto, and Kazushi Miki
  • Journal Title: Francesca Pincella, Yeji Song, Takao Ochiai, Katsuhiro Isozaki, Kenji Sakamoto, and Kazushi Miki Volume: 605-606 Pages: 115-120
  • DOI: 10.1016/j.cplett.2014.05.020
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Surface Potential Change of Cationic Nanoparticles by Polymer Coating (2014)
  • Author(s): Kullavadee Karn-orachai , Satoko Nishiyama, Kazushi Miki
  • Journal Title: Journal of Photopolymer Science and Technology Volume: 27 Pages: 273-276
  • DOI: 10.2494/photopolymer.27.273
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Enhanced catalysis of gold nanoparticles capped bty alkanethiol-self-assembled monolayer (2015)
  • Author(s): Katsuhiro Isozaki, Tomoya Taguchi, Kosuke Ishibashi, Hikaru Takaya, Masaharu Nakamura and Kazushi Miki
  • Organizer: Fourth International Conference on Mulifunctional, Hybrid and Nanomaterials
  • Place of Presentation: スペイン、マドリッド市
  • Year and Date: 2015-03-09 – 2015-03-12
• [Presentation] Surface Enhanced Raman Spectroscopy (SERS) Substrate towards bio-sensor for detecting serious diseases in Southeast Asia (2014)
  • Author(s): Kazushi Miki, Karn-Orachai Kullavadee, Kenji Sakamoto, Koh-ichi Nittoh, .Satoko Nishiyama, Sayaka Yanagida,, Rawiwan Laocharoensuk, Suwussa Bamrungsap, Tararaj Dharakul, Sirirurg Songsivilai, Thi Dieu Thuy Ung, Thi Kim Chi Tran, and Liem Quang Nguyen
  • Organizer: The 7th International Workshop on ADVANCED MATERIALS SCIENCE AND NANOTECHNOLOGY
  • Place of Presentation: ベトナム、ハロン湾市
  • Year and Date: 2014-11-05
  • Invited
• [Presentation] 可視光駆動可能なチタニア結晶光触媒デバイス (2014)
  • Author(s): 三木 一司，Pincella Francesca, 磯崎 勝弘
  • Organizer: 応用物理学会2014秋季講演会 薄膜・表面シンポジウム「固液界面を使った新しい酸化物エレクトロニクス：化学とデバイスの融合」
  • Place of Presentation: 札幌市
  • Year and Date: 2014-09-18
• [Presentation] 2D Array of Gold Nanoparticles Immobilized on Large-area Substrate Towards Nanophotonics Applications (2014)
  • Author(s): Kazushi Miki and Katsuhiro Isozaki
  • Organizer: the 5th International Conference on Nanotechnology: Fundamentals and Applications (ICNFA 2014)
  • Place of Presentation: チェコ共和国 プラハ市
  • Year and Date: 2014-08-12
• [Presentation] Enhanced Catalysis of Gold Nanoparticles Surrounded by Alkanethiol Self-Assembled Monolayers (2014)
  • Author(s): Katsuhiro Isozaki, Taguchi Tomoya, Kosuke Ishibashi, Hikaru Takaya, Masaharu Nakamura, and Kazushi Miki
  • Organizer: the XXVI International Conference on Organometallic Chemistry
  • Place of Presentation: 札幌市
  • Year and Date: 2014-07-13 – 2014-07-18
• [Presentation] Surface Potential Change of Cationic Nanoparticles by Polymer Coating (2014)
  • Author(s): Karn-orachai Kullavadee, Satoko Nishiyama, Kazushi Miki
  • Organizer: 31st International Conference of Photopolymer Science and Technology (ICPST-31)
  • Place of Presentation: 千葉市
  • Year and Date: 2014-07-08 – 2014-07-11
• [Presentation] Mixed alkanethiol-SAM on large-sized (> 10 nm) gold nanoparticles for enhancement of their self-assembly on an ITO substrate (2014)
  • Author(s): Takao Ochiai, Katsuhiro Isozaki, Satoko Nishiyama, and Kazushi Miki
  • Organizer: NIMS conference 2014 “A Strong Future from Soft Materials”
  • Place of Presentation: つくば市
  • Year and Date: 2014-07-02
• [Presentation] Enhanced Catalysis of Self-Assembled Monolayer-Capped Gold Nanoparticles (2014)
  • Author(s): Katsuhiro Isozaki, Taguchi Tomoya, Kosuke Ishibashi, Hikaru Takaya, Masaharu Nakamura, and Kazushi Miki
  • Organizer: Seventh Tokyo Conference on Advanced Catalytic Science and Technology
  • Place of Presentation: 京都市
  • Year and Date: 2014-07-01 – 2014-07-06