We introduce a method to build up organic/organic and organic/inorganic multilayer films composed of cationic poly(allylamine hydrochloride) (PAH) and negatively charged poly(sodium 4-styrenesulfonate) (PSS) or inorganic cadmium sulfide (CdS) nanoparticles using a spinning process. Since the deposition of each layer is made at a high spinning speed, the adsorption time for the formation of a homogeneous thin layer takes only 8 to 15 seconds. The adsorbed film thickness per bilayer can be easily controlled from about 5Å to 40Å by varying the spinning speed (Ω) and the mole concentration of polyelectrolytes. We also demonstrated with X-ray reflectivity that the alternating organic/inorganic ultrathin films fabricated by the spin SA process retain highly ordered internal structure in comparison with those prepared by the conventional SA process.
|Materials Research Society Symposium - Proceedings
|Published - 2001
|Growth, Evolution and Properties of Surfaces, Thin Films and Self-Organized Strutures - Boston, MA, United States
Duration: 2000 Nov 27 → 2000 Dec 1
Bibliographical noteFunding Information:
This work was supported by the Ministry of Education through the Brain Korea 21 Program at Seoul National University. X-ray reflectivity experiments performed at the Pohang Light Source (PLS) were supported in part by MOST and POSCO. We are very grateful to S.-H. Lee, H. Kang, J. Koo, B. H. Seung and Prof. K.-B. Lee for their assistance during X-ray reflectivity experiments. We also thank Prof. J.-D. Hong at University of Inchon for kindly providing UV/vis spectroscopy.
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering