Observation of slowly decreasing molecular oscillations in ultrathin liquid films using X-ray reflectivity
- Authors
- Lee, D. R.; Choi, S. H.; Lee, H. H.; Kim, J. -Y.; Yu, C. -J.
- Issue Date
- Feb-2009
- Publisher
- EDP SCIENCES S A
- Citation
- EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS, v.167, pp.163 - 169
- Journal Title
- EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
- Volume
- 167
- Start Page
- 163
- End Page
- 169
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/15889
- DOI
- 10.1140/epjst/e2009-00953-4
- ISSN
- 1951-6355
- Abstract
- We studied similar to 0.5 mu m and 30-80 angstrom thick films of a normal dielectric liquid, tetrakis(2-ethylhexoxy) silane (TEHOS), at temperature range 228-286 K, deposited onto silicon ( 111) substrate with native oxide using X-ray reflectivity. TEHOS is spherical with size similar to 10 angstrom, non-polar, non-reactive, and non-entangling; TEHOS has been reported to show interfacial layering at room temperature and surface layering at 0.23 T(c) (T(c) approximate to 950 K). For. lms similar to 0.5 mu m thick, the reflectivity data did not change significantly as a function of temperature; for. lms 30-80 angstrom thick, the re. ectivity data did change. The data could be fitted with an electron density model composed of a minimum necessary number of Gaussians and a uniform density layer with error-function broadened interfaces. When the film thickness is 60-80 angstrom below 246 K, we found that the interface and the surface layering coexist but do not overlap. When the film thickness is 30-40 angstrom below 277 K, they overlap and the electron density pro. le shows slowly decreasing molecular oscillations at the air-liquid interface.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/15889)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.