Design Strategies for Reduced-scale Surface Composition Gradients via CVD Copolymerization
| Autor: | Aftin M. Ross, Paul H. Krebsbach, Michael P. Hoepfner, Yaseen Elkasabi, Joerg Lahann, H. Scott Fogler, Jonathan Oh |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Materials science Infrared Process Chemistry and Technology Diffusion Analytical chemistry Surfaces and Interfaces General Chemistry Polymer Surface engineering symbols.namesake Fourier transform chemistry X-ray photoelectron spectroscopy symbols Copolymer Fourier transform infrared spectroscopy |
| Zdroj: | Chemical Vapor Deposition. 20:23-31 |
| ISSN: | 0948-1907 |
| DOI: | 10.1002/cvde.201307057 |
| Popis: | A new method for generating and modeling reduced-scale copolymer gradients by CVD is reported. By exploiting diffusion through confined channels, functionalized [2.2]paracyclophanes are copolymerized into their poly(p-xylylene) (PPX) analogues as a composition gradient. Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) are used to verify the gradient composition profiles. Gradients are deposited on both flat substrates and 3-dimensional cylinders. Both the thickness and compositional profiles are fitted to a diffusion-based model using realistic physical parameters. The derived equation can be generalized and optimized for any copolymerization gradient through a confined geometry, thus allowing for broad applicability to other copolymer systems. |
| Databáze: | OpenAIRE |
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