Temperature and crystal size dependence of excitonic absorption for polydiacetylene microcrystals

Hideyuki Katagi, Hidetoshi Oikawa, Shuji Okada, Hitoshi Kasai, Akira Watanabe, Osamu Ito, Yasuo Nozue, Hachiro Nakanishi

研究成果: Conference article査読

29 被引用数 (Scopus)

抄録

The excitonic absorption of well defined polydiacetylene microcrystals was measured as a function of temperature and crystal size. Poly-DCHD microcrystals were prepared by a recently reported reprecipitation method, and crystal size was controlled by changing the concentration of diacetylene monomer solution injected into water. The excitonic absorption peak position was blue-shifted from 650 nm to 635 nm with decreasing crystal size from 120 nm to 30 nm. On the other hand, the peak position was red-shifted by 15 nm (300 cm-1) upon decreasing the temperature from 273 K to 4 K. Narrowing of the half peak width was also observed to accompany this red-shift. These phenomena are considered to be related to the coupling interaction between the excitonic state and phonons depending on crystal size and temperature.

本文言語English
ページ(範囲)285-290
ページ数6
ジャーナルMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
314
DOI
出版ステータスPublished - 1998 1 1
イベントProceedings of the 1998 TAPPI Metered Size Press Forum - New Orleans, LA, USA
継続期間: 1998 4 301998 5 2

ASJC Scopus subject areas

  • Condensed Matter Physics

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