Positional order in Langmuir monolayers: An x-ray diffraction study
Kaganer, VM; Brezesinski, G; Mohwald, H; Howes, PB; Kjaer, K
| HERO ID | 4937285 |
|---|---|
| In Press | No |
| Year | 1999 |
| Title | Positional order in Langmuir monolayers: An x-ray diffraction study |
| Authors | Kaganer, VM; Brezesinski, G; Mohwald, H; Howes, PB; Kjaer, K |
| Journal | Physical Review E |
| Volume | 59 |
| Issue | 2 |
| Page Numbers | 2141-2152 |
| Abstract | The structural phase transition from the hexagonal to a distorted-hexagonal (centered rectangular) phase (the LS-S transition) in Langmuir monolayers of octadecanol is studied in a grazing incidence x-ray diffraction experiment. We find algebraic decay of positional correlations, which suggests solid-like order in both phases at the distances accessible in the present x-ray diffraction experiment. The transition is accompanied by strong positional disorder, which is evident from the drastic increase of the exponent eta to values eta>2 close to the transition. Remarkably, on approaching the transition, the continuous increase of eta is apparent already at 20 degrees C above it. The positional disorder is attributed to elastic distortions around pretransitional fluctuations. [S1063-651X(99)10102-8]. |
| Doi | 10.1103/PhysRevE.59.2141 |
| Wosid | WOS:000078779700027 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |