English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 57042/90725 (63%)
造訪人次 : 12437343      線上人數 : 45
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27675

    題名: Conformation and energy transfer in a single luminescent conjugated polymer
    作者: 楊淑君;Yang, Shu-chun;White, J. D.;Hsu, Jui-Hung;Peng, K. Y.;Chen, S. A.;Fann, Wun-Shain
    貢獻者: 淡江大學物理學系
    日期: 2005-04-05
    上傳時間: 2009-12-31 10:36:30 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: The photophysics and conformation of single long-chain 2,5-dioctyloxy-p-phenylenevinylene (DOO-PPV) polymers are investigated. The fluorescence intensity−time trace of an individual polymer contains abrupt quantized intensity changes superimposed on small gradual changes. Under the same processing conditions, the size of abrupt changes varies from individual to individual, varying between 0 and 100% of the total intensity. Polarization modulation indicates considerable orientation of absorption dipoles within the polymer. Time-dependent measurements indicate that, in the majority of polymers, absorption dipoles in those regions of the polymer responsible for abrupt intensity changes are arranged less anisotropically than in regions responsible for the gradual changes. Spectroscopic measurements show a greater spectral variation accompanying jumps than that accompanying gradual decay. This can be explained by the coexistence of extended regions and a core region. The first is characterized by a relatively greater alignment of absorption dipoles and multiple emitters, while in the second, absorption dipoles are more isotropically distributed and energy is efficiently funneled to a few emitting excitons. Within a single processing batch, the ratio of these two regions varies from individual to individual.
    關聯: Macromolecules 38(7), pp.2966-2973
    顯示於類別:[物理學系暨研究所] 期刊論文


    檔案 描述 大小格式瀏覽次數



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋