| Issue |
Europhys. Lett.
Volume 64, Number 3, November 2003
|
|
|---|---|---|
| Page(s) | 385 - 391 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00206-0 | |
| Published online | 01 November 2003 | |
Incomplete transfer-induced interfacial roughening of Langmuir-Blodgett films
1
Institute of Physics, Chinese Academy of Sciences - Beijing 100080, PRC
2
College of Chemistry and Molecular Engineering - Peking University, PRC
3
Beijing Synchrotron Radiation Facility - Beijing 100039, PRC
Corresponding author: mingli@aphy.iphy.ac.cn
Received:
15
April
2003
Accepted:
26
August
2003
A growth model is proposed for the interfacial evolution of imperfect Langmuir-Blodgett films. It indicates that the kinetic roughening arises from the incomplete membrane transfer. But the surface tension depresses the fluctuations, leading to a logarithmic interfacial correlation. The finite defect size and the finite film thickness result in a short-distance cutoff and a long-distance saturation, respectively. A correlation function is derived to explain the X-ray scattering data of the films, from which the mean size of the desorbed patches and the healing length of the growing membranes are estimated.
PACS: 68.47.Pe – Langmuir-Blodgett films on solids; polymers on surfaces; biological molecules on surfaces / 61.10.-i – X-ray diffraction and scattering / 68.55.-a – Thin film structure and morphology
© EDP Sciences, 2003
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