Abstract
In this study, we demonstrate that the adsorbed amount of respective layers in spin self-assembled multilayer films can be controlled and predictable using an empirical power-law equation in terms of spin speed and initial solution concentration. The amount of a pair of polyelectrolytes deposited per bilayer rapidly increases with increasing polyelectrolyte concentration up to 12.5 mM while the solution concentration above 16 mM has no appreciable effect on the adsorbed amount. The adsorbed film thickness per bilayer is shown to be easily controlled from about 5 to 40 Å and proportional to constant power exponents of - 0.34 and 0.78 with respect to the spinning speed (Ω) and the mole concentration of polyelectrolytes, respectively. We also demonstrate with synchrotron X-ray reflectivity measurement that the alternating organic/inorganic ultrathin films fabricated by the spin self-assembly process contain highly ordered internal structure and retain unique optical characteristics determined by the boundary condition at both the substrate/multilayer film interface as well as the multilayer/air interface.
| Original language | English |
|---|---|
| Pages (from-to) | 5455-5459 |
| Number of pages | 5 |
| Journal | Polymer |
| Volume | 44 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2003 Aug 7 |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by the National Research Laboratory fund (Grant M1-0104-00-0191) from the Ministry of Science and Technology (MOST), the Ministry of Education through the Brain Korea 21 Program at Seoul National University and the National R&D Project for Nano Science and Technology. X-ray reflectivity experiments performed at the Pohang Light Source (PLS) were also supported in part by MOST and POSCO.
Keywords
- Layer-by-layer films
- Spin self-assembly
- X-ray reflectivity
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry