Anomalous hydrodynamic behavior of lyotropic smectic phases of hydrated phospholipid at low frequencies

Jun Yamamoto, Yuka Tabe, Koji Okano

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We measured the frequency dependence of the longitudinal viscosity and the layer compression modulus of homeotropically aligned multilamellar film of hydrated dimyristoyl phosphatidylcholine (DMPC) at low frequencies from 10 Hz to 1 kHz, varying temperature (T) and relative humidity (RH) systematically. We have, for the first time, demonstrated unambiguously that in the La phase (the lyotropic smectic-A phase) the longitudinal viscosity diverges as 1 /co when the circular frequency goes to zero. In addition, we were able to construct the T-RH phase diagram of the La- Lp. transition of hydrated DMPC, based upon the T and RH dependences of the layer compression modulus. The phase boundary thus determined agreed well with that obtained by X-ray scattering by Smith et al. (J. Chem. Phys. 92 (1990) 4519).

本文言語English
ページ(範囲)L1560-L1562
ジャーナルJapanese journal of applied physics
31
11
DOI
出版ステータスPublished - 1992 11
外部発表はい

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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