Design Strategies for Reduced‐scale Surface Composition Gradients via  CVD  Copolymerization | Zendy

Elkasabi Yaseen | Zendy; Ross Aftin M. | Zendy; Oh Jonathan | Zendy; Hoepfner Michael P. | Zendy; Fogler H. Scott | Zendy; Lahann Joerg | Zendy; Krebsbach Paul H. | Zendy

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Design Strategies for Reduced‐scale Surface Composition Gradients via CVD Copolymerization

Author(s) -

Elkasabi Yaseen,

Ross Aftin M.,

Oh Jonathan,

Hoepfner Michael P.,

Fogler H. Scott,

Lahann Joerg,

Krebsbach Paul H.

Publication year - 2014

Publication title -

chemical vapor deposition

Language(s) - English

Resource type - Journals

eISSN - 1521-3862

pISSN - 0948-1907

DOI - 10.1002/cvde.201307057

Subject(s) - copolymer , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , diffusion , materials science , fourier transform , polymer , composition (language) , infrared , polymer chemistry , chemical engineering , analytical chemistry (journal) , chemistry , optics , thermodynamics , composite material , physics , organic chemistry , linguistics , philosophy , engineering , quantum mechanics

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.

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