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Foster RN, Keefe AJ, Jiang S, et al. Surface initiated atom transfer radical polymerization grafting of sodium styrene sulfonate from titanium and silicon substrates. J Vac Sci Technol A. 2013;31(6):6F103doi: 10.1116/1.4819833.
Foster, R. N., Keefe, A. J., Jiang, S., & Castner, D. G. (2013). Surface initiated atom transfer radical polymerization grafting of sodium styrene sulfonate from titanium and silicon substrates. Journal of vacuum science & technology. A, Vacuum, surfaces, and films : an official journal of the American Vacuum Society, 31(6), 6F103. https://doi.org/10.1116/1.4819833
Foster, Rami N, et al. "Surface initiated atom transfer radical polymerization grafting of sodium styrene sulfonate from titanium and silicon substrates." Journal of vacuum science & technology. A, Vacuum, surfaces, and films : an official journal of the American Vacuum Society vol. 31,6 (2013): 6F103. doi: https://doi.org/10.1116/1.4819833
Foster RN, Keefe AJ, Jiang S, Castner DG. Surface initiated atom transfer radical polymerization grafting of sodium styrene sulfonate from titanium and silicon substrates. J Vac Sci Technol A. 2013 Nov;31(6):6F103. doi: 10.1116/1.4819833. Epub 2013 Sep 05. PMID: 24482558; PMCID: PMC3869207.
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J Vac Sci Technol A. 2013 Nov;31(6):6F103. doi: 10.1116/1.4819833. Epub 2013 Sep 05.

Surface initiated atom transfer radical polymerization grafting of sodium styrene sulfonate from titanium and silicon substrates.

Journal of vacuum science & technology. A, Vacuum, surfaces, and films : an official journal of the American Vacuum Society

Rami N Foster, Andrew J Keefe, Shaoyi Jiang, David G Castner

Affiliations

  1. Department of Chemical Engineering, University of Washington-Seattle, and National ESCA and Surface Analysis Center for Biomedical Problems, Seattle, Washington 98195.
  2. Department of Chemical Engineering, University of Washington-Seattle, Seattle, Washington 98195.
  3. Departments of Chemical Engineering and Bioengineering, University of Washington-Seattle, and National ESCA and Surface Analysis Center for Biomedical Problems, Seattle, Washington 98195.

PMID: 24482558 PMCID: PMC3869207 DOI: 10.1116/1.4819833

Abstract

This study investigates the grafting of poly-sodium styrene sulfonate (pNaSS) from trichlorosilane/10-undecen-1-yl 2-bromo-2-methylpropionate functionalized Si and Ti substrates by atom transfer radical polymerization (ATRP). The composition, molecular structure, thickness, and topography of the grafted pNaSS films were characterized with x-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), variable angle spectroscopic ellipsometry (VASE), and atomic force microscopy (AFM), respectively. XPS and ToF-SIMS results were consistent with the successful grafting of a thick and uniform pNaSS film on both substrates. VASE and AFM scratch tests showed the films were between 25 and 49 nm thick on Si, and between 13 and 35 nm thick on Ti. AFM determined root-mean-square roughness values were ∼2 nm on both Si and Ti substrates. Therefore, ATRP grafting is capable of producing relatively smooth, thick, and chemically homogeneous pNaSS films on Si and Ti substrates. These films will be used in subsequent studies to test the hypothesis that pNaSS-grafted Ti implants preferentially adsorb certain plasma proteins in an orientation and conformation that modulates the foreign body response and promotes formation of new bone.

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