期刊論文
| 學年 | 85 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 1997-01-01 |
| 作品名稱 | Low-frequency dynamics of liquid crystals |
| 作品名稱（其他語言） | |
| 著者 | Hsueh, H. C.; H. Vass; F. N. Pu; S. J. Clark; W. C. K. Poon; J. Crain |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | EUROPHYSICS LETTERS 38(2), pp.107-112 |
| 摘要 | The nature of low-frequency (0 to 200 cm−1) dynamics of liquid crystal molecules is explored using a combination of high-resolution Raman spectroscopy and first principles computer simulations implemented on a parallel computer. The frequencies and displacement patterns associated with these vibrations have been determined by diagonalisation of a dynamical matrix. Results indicate that in the prototypical nematogen 5CB, complex internal modes have frequencies comparable to those of lattice modes in the low-temperature solid polymorphs. We expect this result is not specific to 5CB and that such behaviour is common to many liquid-crystal systems. Such low-frequency modes may be related to the conformational changes which have been observed to occur near liquid crystalline phase transitions. In smectic 8CB, very low-frequency features (near 10 cm−1) in the Raman spectrum are observed and are attributed to interlayer interactions in the smectic phase. |
| 關鍵字 | |
| 語言 | en |
| ISSN | |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 0 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/107888 ) |