Abstract
Hybrid thin films composed of block copolymer(BCP) and TiO2 with various morphologies on the nanoscale were fabricated using self-assembly of block copolymer combined with sol-gel proccess. The factors governing morphology changes considered in this study are block copolymer composition, selectivity of solvent and the inclusion of an additive. We also investigated the efficiency of photoluminescence for selected films with different morphologies. Micelle or nanowire structure can be derived from the self-assembly of poly(styrene-block-4-vinyl pyridine) (PS-b-P4VP) depending on the relative selectivity of the solvent for the two blocks, and the titanium tetraisopropoxide(Ti{OCH(CH3)2}4, TTIP) is coordinated with nitrogen in P4VP block. Addition of a third component 3-pentadecylphenol into the BCP/sol-gel mixture solution induces morphology change as a result of the change of relative volume fraction of the BCP. We confirmed that the efficiency of TiO2 fluorescence changes for films depending on morphologies.
| Original language | English |
|---|---|
| Pages (from-to) | 465-469 |
| Number of pages | 5 |
| Journal | Polymer (Korea) |
| Volume | 32 |
| Issue number | 5 |
| State | Published - Sep 2008 |
Bibliographical note
Funding Information:From the Departments of Pediatric Surgery, Clinical Biochemistry, and Experimental Surgery, The Faculty of Medicine, Institute of Technology, Technion, Haifa, Israel Presented at the 41st Annual International Congress of the British Association of Paediatric Surgeons, Rotterdam, The Netherlands, June 29-July 1, 1994. Supported in part by the Hirschenstrauss-Gutman Medical Research Fund. Address reprint requests to G. Shoshany, MD, Department of Pediatric Surgery, Rambam Medical Center, Haifa 31096, Israel Copyright © 1995 by W.B. Saunders Company 0022-3468/95/3003-0006503. 00/0
Keywords
- Block copolymer
- Fluorescence
- Poly(styrene-block-4-vinyl pyridine)
- Sol-gel
- TiO