• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2006 Fiscal Year Final Research Report Summary

Time-resolved near-field spectroscopic study on photophysical processes at solid/liquid interface

Research Project

Project/Area Number 16072217
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionKwansei Gakuin University

Principal Investigator

TAMAI Naoto  Kwansei Gakuin University, 理工学部, Professor (60163664)

Project Period (FY) 2004 – 2006
KeywordsTransient Absorption Microspectroscopy / Semiconductor Quantum Dot / Scanning Probe Microscopy / Silver Nanorod / Photoinc Crystal Fiber / Single Particle Spectroscopy
Research Abstract

1) Spectroscopic Properties of Semiconductor Nanostructures by Scanning Probe Microspectroscopy Non-linear optical properties such as two-photon absorption cross section and nonlinear refractive index of CdTe QDs were found to strongly depend on a size of QDs. The figure of merit was also found to increase with decreasing the size. The size dependence of nonlinear optical properties was analyzed by the theory derived by Sheik Bahae. CdTe nanowires synthesized from QDs was analyzed by time-resolved SPM, suggesting the heterogeneity of nanowires. In addition, the exciton annihilation of nanowires increased as compared with QDs because of the energy diffusion in nanowires. In previous experiments, blinking behavior was observed for single QD embedded by PVA and trehalose. We have found that the silica coating of a single CdTe QD dramatically suppress the blinking, suggesting that the environmental condition plays an important role for luminescence properties of single QD. Furthermore, CdS … More e nanorods and QDs were synthesized at low temperature and their physicochemical properties have been examined by SPM.
2) Synthesis and Characterization of Ag Nanorods Silver nanorods were prepared by a seed-mediated growth approach with chemical reduction of Ag^+ in a detergent aqueous solution. Longitudinal and transverse modes of plasmon absorption have been clearly observed in this synthetic approach. Transient absorption dynamics indicates that the coherent acoustic vibration with oscillation period of 20 to 40 ps was originated from the heat release of nanorods that induces a periodic shift of plasmon absorption bands. By the analysis of acoustic vibration, the size of synthetic nanorods and the aspect ratio have been estimated.
3) Highly-sensitive, Broadband Transient Absorption Microspectroscopy Detection wavelength region was expanded up to 1.6 μm by using InGaAs photodiode as a detector, which enables us to examine the dynamics of exciton delocalization or weak intermolecular interaction dynamics in small domains at interface with high sensitivity of △OD = 10^<-7> 〜 10^<-8>..Global-pump and local-probe geometry was also successful for transient absorption SNOM experiments. Less

  • Research Products

    (9 results)

All 2007 2006 2005

All Journal Article (6 results) (of which Peer Reviewed: 3 results) Presentation (2 results) Book (1 results)

  • [Journal Article] Detection of Optical Trapping of CdTe Quantum Dots by Two-photon-induced Luminescence2007

    • Author(s)
      L. Pan, A. Ishikawa, N. Tamai
    • Journal Title

      Phys. Rev. B Vol. 75

      Pages: 161305-1-4

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optical and Dynamic Properties of Water Soluble Highly Luminescent CdTe Quantum Dots2007

    • Author(s)
      A. Mandal, J. Nakayama, N. Tamai, V. Biju, M. Isikawa
    • Journal Title

      J. Phys. Chem. B Vol. 111

      Pages: 12765-12771

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Nonlinear Optical Properties of Thiol-capped CdTe Quantum Dots in Nonresonant Region2007

    • Author(s)
      L. Pan, N. Tamai, K. Kamada, S. Deki
    • Journal Title

      Appl. Phys. Lett. Vol. 91

      Pages: 051902-1-3

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Femtosecond Fluorescence Spectroscopy and Near-field Spectroscopy of Water-soluble Tetra(4- sulfonatophenyl)porphyrin and its J-aggregate2006

    • Author(s)
      A. Miura, Y. Shibata, H. Chosrowjan, N. Mataga, *N. Tamai
    • Journal Title

      J. Photochem. Photobiol. A : Chem. 178

      Pages: 192-200

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Intramolecular Proton Transfer in 4-Methyl-2, 6-diformyl phenol and its Derivative Studied by Femtosecond Transient Absorption Spectroscop2006

    • Author(s)
      S^*. Mitra, N. Tamai, S. Mukherjee
    • Journal Title

      J. Photochem. Photobiol. A : Chem. 178

      Pages: 76-82

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] UV-Vis, NMR, and Time-Resolved Spectroscopy Analysis of PhotoisomerizationBehavior of Three- and Six-Azobenzene-Bound Tris(bipyridine)cobalt Complexes2005

    • Author(s)
      K. Yamaguchi, S. Kume, M. Murata, N. Tamai, ^*H. Nishihara
    • Journal Title

      Inorg. Chem. 44

      Pages: 9056-9067

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Presentation] Photochemistry and Photophysics of CdTe Quntum Dots and Nanowires2007

    • Author(s)
      Lingyun Pan, Abhijit Mandal, Youichi Kobayashi, Naoto Tamai
    • Organizer
      2007 Korea-Japan Symposium on Frontier Photoscience
    • Place of Presentation
      Gyeongju, Korea
    • Year and Date
      20071122-20071125
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Spectroscopy and Dynamics of Semiconductor Quantum Dots and Nanowires by Microspectroscopy2006

    • Author(s)
      N. Tamai, L. Pan, J. Nakayama, Y. Miyoshi, A. Mandal
    • Organizer
      2006 Korea-Japan Symposium on Frontier Photoscience
    • Place of Presentation
      Seoul, Korea
    • Year and Date
      20061103-20061106
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 役に立つ化学シリーズ2. 分子の物理化学2006

    • Author(s)
      安保正一, 川崎昌博編, 玉井尚登(分担)
    • Total Pages
      108-123
    • Publisher
      朝倉書店
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2010-06-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi