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Zorn G, Castner DG, Tyagi A, et al. Analysis of the surface density and reactivity of perfluorophenylazide and the impact on ligand immobilization. J Vac Sci Technol A. 2015;33(2):021407doi: 10.1116/1.4907924.
Zorn, G., Castner, D. G., Tyagi, A., Wang, X., Wang, H., & Yan, M. (2015). Analysis of the surface density and reactivity of perfluorophenylazide and the impact on ligand immobilization. Journal of vacuum science & technology. A, Vacuum, surfaces, and films : an official journal of the American Vacuum Society, 33(2), 021407. https://doi.org/10.1116/1.4907924
Zorn, Gilad, et al. "Analysis of the surface density and reactivity of perfluorophenylazide and the impact on ligand immobilization." Journal of vacuum science & technology. A, Vacuum, surfaces, and films : an official journal of the American Vacuum Society vol. 33,2 (2015): 021407. doi: https://doi.org/10.1116/1.4907924
Zorn G, Castner DG, Tyagi A, Wang X, Wang H, Yan M. Analysis of the surface density and reactivity of perfluorophenylazide and the impact on ligand immobilization. J Vac Sci Technol A. 2015 Mar;33(2):021407. doi: 10.1116/1.4907924. Epub 2015 Feb 12. PMID: 25759511; PMCID: PMC4327916.
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J Vac Sci Technol A. 2015 Mar;33(2):021407. doi: 10.1116/1.4907924. Epub 2015 Feb 12.

Analysis of the surface density and reactivity of perfluorophenylazide and the impact on ligand immobilization.

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

Gilad Zorn, David G Castner, Anuradha Tyagi, Xin Wang, Hui Wang, Mingdi Yan

Affiliations

  1. National ESCA and Surface Analysis Center for Biomedical Problems, Departments of Bioengineering and Chemical Engineering, University of Washington , Box 351653, Seattle, Washington 98195-1653.
  2. Department of Chemistry, Portland State University , Portland, Oregon 97207-0751.

PMID: 25759511 PMCID: PMC4327916 DOI: 10.1116/1.4907924

Abstract

Perfluorophenylazide (PFPA) chemistry is a novel method for tailoring the surface properties of solid surfaces and nanoparticles. It is general and versatile, and has proven to be an efficient way to immobilize graphene, proteins, carbohydrates, and synthetic polymers. The main thrust of this work is to provide a detailed investigation on the chemical composition and surface density of the PFPA tailored surface. Specifically, gold surfaces were treated with PFPA-derivatized (11-mercaptoundecyl)tetra(ethylene glycol) (PFPA-MUTEG) mixed with 2-[2-(2-mercaptoethoxy)ethoxy]ethanol (MDEG) at varying solution mole ratios. Complementary analytical techniques were employed to characterize the resulting films including Fourier transform infrared spectroscopy to detect fingerprints of the PFPA group, x-ray photoelectron spectroscopy and ellipsometry to study the homogeneity and uniformity of the films, and near edge x-ray absorption fine structures to study the electronic and chemical structure of the PFPA groups. Results from these studies show that the films prepared from 90:10 and 80:20 PFPA-MUTEG/MDEG mixed solutions exhibited the highest surface density of PFPA and the most homogeneous coverage on the surface. A functional assay using surface plasmon resonance with carbohydrates covalently immobilized onto the PFPA-modified surfaces showed the highest binding affinity for lectin on the PFPA-MUTEG/MDEG film prepared from a 90:10 solution.

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