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)


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.

ジャーナルMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
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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